Add files via upload

Updated the Special Thanks section to include a table format with contributor images and a message of appreciation.

.github/workflows/build-dev.yml

@@ -8,25 +8,62 @@ on:
 permissions:
   contents: write
 
+concurrency:
+  group: release
+  cancel-in-progress: false
+
 jobs:
   build:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Get latest semantic version tag
+        id: version
+        shell: bash
+        run: |
+          git fetch --tags
+
+          LAST_TAG=$(git tag --sort=-v:refname | grep -E '^[0-9]+\.[0-9]+\.[0-9]+$' | head -n 1 || true)
+
+          if [ -z "$LAST_TAG" ]; then
+            NEW_TAG="1.0.0"
+          else
+            IFS='.' read -r MAJOR MINOR PATCH <<< "$LAST_TAG"
+
+            PATCH=$((PATCH + 1))
+
+            NEW_TAG="$MAJOR.$MINOR.$PATCH"
+          fi
+
+          echo "Latest tag: $LAST_TAG"
+          echo "New tag: $NEW_TAG"
+
+          echo "NEW_TAG=$NEW_TAG" >> $GITHUB_OUTPUT
+
+      - name: Create Git tag
+        shell: bash
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+          git tag ${{ steps.version.outputs.NEW_TAG }}
+          git push origin ${{ steps.version.outputs.NEW_TAG }}
 
       - name: Build firmware
+        shell: bash
         run: |
           export DIST_SUFFIX=Flipper-ARF
           chmod +x fbt
           ./fbt COMPACT=1 DEBUG=0 updater_package
 
-      - name: Generate tag name
-        id: tag
-        run: echo "TAG=dev-$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
-
       - name: Detect firmware updater
         id: firmware
+        shell: bash
         run: |
           DIR=$(ls -d dist/f7-* | head -n 1)
           FILE="$DIR/flipper-z-f7-update-Flipper-ARF.tgz"
@@ -36,13 +73,28 @@ jobs:
             exit 1
           fi
 
+          echo "Found firmware: $FILE"
+
           echo "FILE=$FILE" >> $GITHUB_OUTPUT
 
-      - name: Create Release
+      - name: Read changelog
+        id: changelog
+        shell: bash
+        run: |
+          {
+            echo 'CHANGELOG<<EOF'
+            cat CHANGELOG.md
+            echo 'EOF'
+          } >> "$GITHUB_OUTPUT"
+
+      - name: Create GitHub Release
         uses: softprops/action-gh-release@v2
         with:
-          tag_name: ${{ steps.tag.outputs.TAG }}
-          name: Dev Build ${{ steps.tag.outputs.TAG }}
-          files: ${{ steps.firmware.outputs.FILE }}
+          tag_name: ${{ steps.version.outputs.NEW_TAG }}
+          name: Release ${{ steps.version.outputs.NEW_TAG }}
+          body: ${{ steps.changelog.outputs.CHANGELOG }}
+          make_latest: true
+          files: |
+            ${{ steps.firmware.outputs.FILE }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

CHANGELOG.md

@@ -0,0 +1,123 @@
+# Changelog
+
+---
+
+# Added
+
+## CarEmulate Scene
+
+* Added custom automotive key emulation view with:
+
+  * D-pad button layout
+  * TX overlay animation
+  * Counter delta display
+  * TX power control integration
+
+* Added `CarEmulateSettings` scene with:
+
+  * Enable/disable toggle for the custom emulate UI
+  * TX power selector
+  * Persistent storage through `SubGhzLastSettings`
+
+### Special Thanks
+
+Special thanks to [RocketGod-git](https://github.com/RocketGod-git) for inspiration from the Proto Pirate application and related UI/interaction concepts that helped shape the CarEmulate workflow.
+
+---
+
+## Generic Custom Button API (`custom_btn_i.h`)
+
+Protocols can now expose UP/DOWN/LEFT/RIGHT button cycling in the transmitter view using a single macro instead of manually wiring switch/case handlers and scattered `set_original()` / `set_max()` calls.
+
+### New macro
+
+```
+SUBGHZ_CUSTOM_BTN_DEFINE_MAP(
+    my_proto,
+    {SUBGHZ_CUSTOM_BTN_OK,    0xAA},
+    {SUBGHZ_CUSTOM_BTN_UP,    0xBB},
+    {SUBGHZ_CUSTOM_BTN_DOWN,  0xCC},
+    {SUBGHZ_CUSTOM_BTN_LEFT,  0xDD},
+    {SUBGHZ_CUSTOM_BTN_RIGHT, 0xEE},
+)
+```
+
+The macro automatically generates:
+
+* `my_proto_custom_btn_to_code()`
+* `my_proto_code_to_custom_btn()`
+* `my_proto_custom_btn_init()`
+
+---
+
+## New Protocols
+
+### Land Rover
+
+* Added support for the Land Rover Sub-GHz protocol.
+
+### Special Thanks
+
+Thanks to [Zero-Mega](https://github.com/Zero-Mega) for research, references, and contributions related to Land Rover protocol support.
+
+---
+
+# Fixed
+
+## CarEmulate
+
+* Fixed `car_emulate_apply_button()` being fully commented out.
+
+  * D-pad input never reached the `custom_btn` system.
+  * Protocols always transmitted the originally captured button regardless of the selected key.
+
+* Fixed `custom_btn_id` potentially being lost if `subghz_tx_start()` internally reset SubGhz state before encoder `deserialize()` execution.
+
+  * The selected button is now passed into `car_emulate_start_tx()`
+  * The button is re-applied immediately before TX begins.
+
+* Fixed hardcoded button labels in the CarEmulate view.
+
+  * Previous labels:
+
+    * `LOCK`
+    * `UNLOCK`
+    * `PANIC`
+    * `BOOT`
+    * `XXX`
+  * Labels are now dynamically stored in the view model and configured by the scene through:
+
+    * `subghz_car_emulate_view_set_labels()`
+
+---
+
+# Internal Changes
+
+## `custom_btn_i.h`
+
+* Added `SubGhzCustomBtnEntry`
+* Added `SUBGHZ_CUSTOM_BTN_DEFINE_MAP`
+* Added automatic conversion helpers
+* Added automatic `_init()` helper generation
+
+---
+
+# Ongoing Work
+
+* Continued improvements and cleanup across additional automotive protocols.
+* Ongoing protocol analysis, decoder refinement, encoder validation, and transmit reliability improvements.
+* Additional protocol integrations and UI enhancements are still actively being developed.
+
+---
+
+# Notes
+
+The old approach required:
+
+* Manual switch/case handlers
+* Manual button registration
+* Repeated `subghz_custom_btn_set_original()`
+* Repeated `subghz_custom_btn_set_max()`
+* Protocol-specific duplicated logic
+
+The new API centralizes all button mapping behavior into a single reusable macro system.

README.md

@@ -22,6 +22,7 @@ This project may incorporate, adapt, or build upon **other open-source projects*
 - [Contribution Policy](#contribution-policy)
 - [Citations & References](#citations--references)
 - [Disclaimer](#disclaimer)
+- [Special Thanks](#special-thanks-to-everyone-who-contributes-to-this-project)
 
 ---
 
@@ -362,13 +363,22 @@ IN NO EVENT SHALL THE AUTHORS, COPYRIGHT HOLDERS, OR CONTRIBUTORS BE LIABLE FOR
 
 ## Special Thanks
 
-- 47LeCoste
-- Ash
-- D4c1
-- D4rks1d3
-- LTX74
-- Leeroy
-- lupettohf
-- MMX
-- RalphWiggum
-- zero-mega
+<table align="center">
+  <tr>
+    <td align="center">
+      <a href="https://github.com/whatthefxck">
+        <img src="https://avatars.githubusercontent.com/whatthefxck?s=80" width="80" height="80" alt="whatthefxck"/>
+      </a>
+    </td>
+    <td align="center">
+      <a href="https://github.com/zero-mega">
+        <img src="https://avatars.githubusercontent.com/zero-mega?s=80" width="80" height="80" alt="zero-mega"/>
+      </a>
+    </td>
+  </tr>
+</table>
+
+<p align="center">
+  Special thanks to everyone who contributed code, testing, reversing,
+  research, ideas, captures and documentation.
+</p>

applications/main/subghz/helpers/subghz_custom_event.h

@@ -64,6 +64,10 @@ typedef enum {
     SubGhzCustomEventViewFreqAnalOkLong,
 
     SubGhzCustomEventByteInputDone,
+    SubGhzCustomEventCarEmulateTransmit,
+    SubGhzCustomEventCarEmulateStop,
+    SubGhzCustomEventCarEmulateExit,
+
 } SubGhzCustomEvent;
 
 typedef enum {

applications/main/subghz/helpers/subghz_types.h

@@ -94,6 +94,7 @@ typedef enum {
     SubGhzViewIdReadRAW,
     SubGhzViewIdPsaDecrypt,
     SubGhzViewIdKeeloqDecrypt,
+    SubGhzViewIdCarEmulate,
 
 } SubGhzViewId;
 

applications/main/subghz/scenes/subghz_scene_car_emulate.c

@@ -0,0 +1,499 @@
+/**
+ * Scene: CarEmulate
+ * Custom automotive-key emulation GUI ported from ProtoPirate.
+ * Activated when SubGhzLastSettings::custom_car_emulate == true and the
+ * user presses "Emulate" on a saved dynamic protocol.
+ *
+ * Flow:
+ *   SavedMenu → Emulate → (custom_car_emulate?) CarEmulate : Transmitter
+ */
+#include "../subghz_i.h"
+#include "../views/subghz_car_emulate.h"
+#include "../helpers/subghz_custom_event.h"
+#include <lib/subghz/blocks/generic.h>
+#include <notification/notification_messages.h>
+#include "../helpers/subghz_txrx_i.h"
+#include <lib/subghz/blocks/custom_btn_i.h>
+
+#define TAG           "SubGhzSceneCarEmulate"
+#define MIN_TX_TICKS  66U   /* ~666 ms at 100 ms tick */
+
+/* ── Per-session state (heap, freed on exit) ─────────────────────────────── */
+typedef struct {
+    /* Signal metadata read from fff_data */
+    char     protocol_name[48];
+    uint32_t serial;
+    uint8_t  original_button;
+    uint32_t original_counter;
+    uint32_t current_counter;
+    uint32_t freq;
+    char     preset_short[12];  /* "AM650", "FM476", … */
+
+    /* TX state */
+    bool     is_transmitting;
+    bool     stop_pending;      /* stop requested before MIN_TX_TICKS elapsed */
+    uint32_t tx_start_tick;
+
+    /* Pending button key (InputKey) decoded from the packed custom event */
+    uint8_t  pending_button;
+} CarEmulateState;
+
+static CarEmulateState* s_state = NULL;
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Button mapping  (protocol-name → InputKey → button byte)
+ * Ported verbatim from protopirate_scene_emulate.c
+ * ═════════════════════════════════════════════════════════════════════════*/
+//static uint8_t car_emulate_map_button(
+//    const char* protocol,
+//    InputKey    key,
+//    uint8_t     original) {
+
+    /* Land Rover V0 */
+//    if(strstr(protocol, "Land Rover")) {
+//        switch(key) {
+//        case InputKeyUp:   return 0x02; /* Lock   */
+//        case InputKeyOk:   return 0x04; /* Unlock */
+//        default:           return original;
+//        }
+//    }
+    /* Mazda */
+//    if(strstr(protocol, "Mazda")) {
+//        switch(key) {
+//        case InputKeyUp:    return 0x01;
+//        case InputKeyOk:    return 0x02;
+//        case InputKeyDown:  return 0x04;
+//        case InputKeyRight: return 0x08;
+//        default:            return original;
+//        }
+//    }
+    /* PSA */
+//    if(strstr(protocol, "PSA")) {
+//        switch(key) {
+//        case InputKeyUp:    return 0x1;
+//        case InputKeyOk:    return 0x2;
+//        case InputKeyDown:  return 0x4;
+//        case InputKeyLeft:  return 0x8;
+//        default:            return original;
+//        }
+//    }
+    /* VAG */
+//    if(strstr(protocol, "VAG")) {
+//        if(original == 0x10 || original == 0x20 || original == 0x40) {
+//            switch(key) {
+//            case InputKeyUp:   return 0x20;
+//            case InputKeyOk:   return 0x10;
+//            case InputKeyDown: return 0x40;
+//            default:           return original;
+//            }
+//        }
+//        switch(key) {
+//        case InputKeyUp:    return 0x2;
+//        case InputKeyOk:    return 0x1;
+//        case InputKeyDown:  return 0x4;
+//        case InputKeyLeft:  return 0x8;
+//        case InputKeyRight: return 0x3;
+//        default:            return original;
+//        }
+//    }
+    /* Honda Static */
+//    if(strstr(protocol, "Honda Static")) {
+//        switch(key) {
+//        case InputKeyUp:    return 0x1;
+//        case InputKeyOk:    return 0x2;
+//        case InputKeyDown:  return 0x4;
+//        case InputKeyRight: return 0x5;
+//        case InputKeyLeft:  return 0x8;
+//        default:            return original;
+//        }
+//    }
+    /* Ford */
+//    if(strstr(protocol, "Ford")) {
+//        switch(key) {
+//        case InputKeyLeft:  return 0x1;
+//        case InputKeyUp:    return 0x2;
+//        case InputKeyOk:    return 0x4;
+//        case InputKeyDown:  return 0x8;
+//        case InputKeyRight: return 0x10;
+//        default:            return original;
+//        }
+//    }
+    /* Chrysler */
+//    if(strstr(protocol, "Chrysler")) {
+//        switch(key) {
+//        case InputKeyUp: return 0x1;
+//        case InputKeyOk: return 0x2;
+//        default:         return original;
+//        }
+//    }
+    /* Subaru */
+//    if(strstr(protocol, "Subaru")) {
+//        switch(key) {
+//        case InputKeyUp:    return 0x1;
+//        case InputKeyOk:    return 0x2;
+//        case InputKeyDown:  return 0x3;
+//        case InputKeyLeft:  return 0x4;
+//        case InputKeyRight: return 0x8;
+//        default:            return original;
+//        }
+//    }
+    /* Fiat V1 */
+//    if(strstr(protocol, "Fiat V1")) {
+//        switch(key) {
+//        case InputKeyUp:   return 0x8;
+//        case InputKeyOk:   return 0x0;
+//        case InputKeyDown: return 0xD;
+//        default:           return original;
+//        }
+//    }
+    /* Generic KeeLoq / KIA etc. – simple 4-button layout */
+//    if(strstr(protocol, "Kia") || strstr(protocol, "KIA") ||
+//       strstr(protocol, "KeeLoq")     || strstr(protocol, "Keeloq")) {
+//        switch(key) {
+//        case InputKeyUp:    return 0x1;
+//        case InputKeyOk:    return 0x2;
+//        case InputKeyDown:  return 0x3;
+//        case InputKeyLeft:  return 0x4;
+//        case InputKeyRight: return 0x8;
+//        default:            return original;
+//        }
+//    }
+
+//    return original;
+//}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * TX helpers
+ * ═════════════════════════════════════════════════════════════════════════*/
+
+/**
+ * Read frequency and short preset name from fff_data.
+ * Falls back to 433.92 MHz / "AM650" on failure.
+ */
+static void car_emulate_read_freq_preset(SubGhz* subghz, CarEmulateState* st) {
+    FlipperFormat* fff = subghz_txrx_get_fff_data(subghz->txrx);
+
+    st->freq = 433920000UL;
+    strncpy(st->preset_short, "AM650", sizeof(st->preset_short) - 1);
+
+    if(!fff) return;
+
+    uint32_t freq = 0;
+    flipper_format_rewind(fff);
+    if(flipper_format_read_uint32(fff, "Frequency", &freq, 1) && freq > 0) {
+        st->freq = freq;
+    }
+
+    FuriString* preset_str = furi_string_alloc();
+    flipper_format_rewind(fff);
+    if(flipper_format_read_string(fff, "Preset", preset_str)) {
+        /* Convert long FuriHal name → short token used by the setting */
+        const char* raw = furi_string_get_cstr(preset_str);
+        const char* short_name = "AM650";
+        if(strstr(raw, "Ook270"))       short_name = "AM270";
+        else if(strstr(raw, "Ook650"))  short_name = "AM650";
+        else if(strstr(raw, "238"))     short_name = "FM238";
+        else if(strstr(raw, "12K"))     short_name = "FM12K";
+        else if(strstr(raw, "476"))     short_name = "FM476";
+        else if(strstr(raw, "Custom"))  short_name = "CUST";
+        strncpy(st->preset_short, short_name, sizeof(st->preset_short) - 1);
+    }
+    furi_string_free(preset_str);
+}
+
+/** Update Btn and Cnt fields in fff_data so the transmitter re-serialises them. */
+static void car_emulate_apply_button(SubGhz* subghz, InputKey key) {
+    UNUSED(subghz);
+
+    uint8_t custom_btn_id;
+    switch(key) {
+    case InputKeyUp:    custom_btn_id = SUBGHZ_CUSTOM_BTN_UP;    break;
+    case InputKeyDown:  custom_btn_id = SUBGHZ_CUSTOM_BTN_DOWN;  break;
+    case InputKeyLeft:  custom_btn_id = SUBGHZ_CUSTOM_BTN_LEFT;  break;
+    case InputKeyRight: custom_btn_id = SUBGHZ_CUSTOM_BTN_RIGHT; break;
+    case InputKeyOk:
+    default:            custom_btn_id = SUBGHZ_CUSTOM_BTN_OK;    break;
+    }
+
+    subghz_custom_btn_set(custom_btn_id);
+}
+
+
+/** Update Cnt in fff_data (Btn is handled by the protocol via custom_btn). */
+static void car_emulate_update_fff(SubGhz* subghz, uint32_t counter) {
+    FlipperFormat* fff = subghz_txrx_get_fff_data(subghz->txrx);
+    if(!fff) return;
+    flipper_format_rewind(fff);
+    flipper_format_insert_or_update_uint32(fff, "Cnt", &counter, 1);
+}
+
+
+/** Apply tx_power to the current preset and start a single transmission burst. */
+static bool car_emulate_start_tx(SubGhz* subghz, uint8_t custom_btn_id) {
+    SubGhzRadioPreset preset = subghz_txrx_get_preset(subghz->txrx);
+    if(preset.data && preset.data_size > 0 && subghz->tx_power > 0) {
+        subghz_txrx_set_tx_power(preset.data, preset.data_size, subghz->tx_power);
+        FURI_LOG_I(TAG, "TX power index applied: %u", subghz->tx_power);
+    }
+
+    subghz_custom_btn_set(custom_btn_id);
+
+    bool ok = subghz_tx_start(subghz, subghz_txrx_get_fff_data(subghz->txrx));
+    if(ok) {
+        subghz->state_notifications = SubGhzNotificationStateTx;
+        notification_message(subghz->notifications, &sequence_blink_magenta_10);
+        FURI_LOG_I(TAG, "TX started");
+    } else {
+        FURI_LOG_E(TAG, "subghz_tx_start failed");
+    }
+    return ok;
+}
+
+
+/** Stop an active transmission. */
+static void car_emulate_stop_tx(SubGhz* subghz) {
+    subghz_txrx_stop(subghz->txrx);
+    subghz->state_notifications = SubGhzNotificationStateIDLE;
+    notification_message(subghz->notifications, &sequence_blink_stop);
+    FURI_LOG_I(TAG, "TX stopped");
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * View callback (fired from the View's input handler)
+ * ═════════════════════════════════════════════════════════════════════════*/
+static void subghz_scene_car_emulate_view_callback(uint32_t event, void* context) {
+    SubGhz* subghz = context;
+    view_dispatcher_send_custom_event(subghz->view_dispatcher, event);
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Helpers to keep the view in sync
+ * ═════════════════════════════════════════════════════════════════════════*/
+static void car_emulate_refresh_view(SubGhz* subghz) {
+    furi_assert(s_state);
+    subghz_car_emulate_view_set_data(
+        subghz->car_emulate_view,
+        s_state->protocol_name,
+        s_state->serial,
+        s_state->current_counter,
+        s_state->original_counter,
+        s_state->freq,
+        s_state->preset_short,
+        s_state->is_transmitting);
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Scene on_enter
+ * ═════════════════════════════════════════════════════════════════════════*/
+void subghz_scene_car_emulate_on_enter(void* context) {
+    SubGhz* subghz = context;
+    furi_assert(subghz);
+
+    /* Allocate per-session state */
+    s_state = malloc(sizeof(CarEmulateState));
+    furi_check(s_state);
+    memset(s_state, 0, sizeof(CarEmulateState));
+
+    /* ── Read metadata from the loaded fff_data ── */
+    FlipperFormat* fff = subghz_txrx_get_fff_data(subghz->txrx);
+    if(fff) {
+        FuriString* tmp = furi_string_alloc();
+
+        flipper_format_rewind(fff);
+        if(flipper_format_read_string(fff, "Protocol", tmp)) {
+            strncpy(
+                s_state->protocol_name,
+                furi_string_get_cstr(tmp),
+                sizeof(s_state->protocol_name) - 1);
+        }
+
+        flipper_format_rewind(fff);
+        flipper_format_read_uint32(fff, "Serial", &s_state->serial, 1);
+
+        flipper_format_rewind(fff);
+        uint32_t btn_tmp = 0;
+        if(flipper_format_read_uint32(fff, "Btn", &btn_tmp, 1)) {
+            s_state->original_button = (uint8_t)btn_tmp;
+        }
+
+        flipper_format_rewind(fff);
+        flipper_format_read_uint32(fff, "Cnt", &s_state->original_counter, 1);
+        s_state->current_counter = s_state->original_counter;
+
+        furi_string_free(tmp);
+    }
+
+    /* ── Initialize the custom_btn system ──────────────────────────────────
+     * Reset first so any leftover state from a previous session is cleared.
+     * Then deserialize the decoder once: this causes the protocol's own
+     * deserialize() to call subghz_custom_btn_set_original() and
+     * subghz_custom_btn_set_max(), which is exactly what the standard
+     * Transmitter scene does via subghz_scene_transmitter_update_data_show().
+     * After this call:
+     *   - subghz_custom_btn_get_original() → the button that was in the file
+     *   - subghz_custom_btn_is_allowed()   → true if protocol supports it
+     *   - subghz_custom_btn_get_max()      → number of buttons available     */
+    subghz_custom_btns_reset();
+
+    SubGhzProtocolDecoderBase* decoder = subghz_txrx_get_decoder(subghz->txrx);
+    if(decoder && fff) {
+        flipper_format_rewind(fff);
+        subghz_protocol_decoder_base_deserialize(decoder, fff);
+        /* Rewind again so subsequent reads in car_emulate_read_freq_preset()
+         * start from the beginning of the file. */
+        flipper_format_rewind(fff);
+    }
+
+        subghz_car_emulate_view_set_labels(
+        subghz->car_emulate_view,
+        "UNLOCK",       /* OK    */
+        "LOCK",         /* Up    */
+        "TRUNK",        /* Down  */
+        "PANIC",        /* Left  */
+        "START"         /* Right */
+    );
+
+    car_emulate_read_freq_preset(subghz, s_state);
+
+    /* ── Configure the view ── */
+    subghz_car_emulate_view_set_callback(
+        subghz->car_emulate_view, subghz_scene_car_emulate_view_callback, subghz);
+
+    car_emulate_refresh_view(subghz);
+
+    subghz->state_notifications = SubGhzNotificationStateIDLE;
+    view_dispatcher_switch_to_view(subghz->view_dispatcher, SubGhzViewIdCarEmulate);
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Scene on_event
+ * ═════════════════════════════════════════════════════════════════════════*/
+bool subghz_scene_car_emulate_on_event(void* context, SceneManagerEvent event) {
+    SubGhz* subghz = context;
+    furi_assert(s_state);
+    bool consumed = false;
+
+    if(event.type == SceneManagerEventTypeCustom) {
+
+        /* ── Transmit ── */
+        if((event.event & 0xFFFFU) == SubGhzCustomEventCarEmulateTransmit) {
+            InputKey key = (InputKey)((event.event >> 16) & 0xFFU);
+
+            /* Stop any ongoing TX first */
+            if(subghz->state_notifications == SubGhzNotificationStateTx) {
+                car_emulate_stop_tx(subghz);
+            }
+
+            /* Bump counter */
+            s_state->current_counter++;
+
+            /* Set the custom button BEFORE deserialize() is called inside
+             * subghz_tx_start() → subghz_txrx_tx_start().
+             * The protocol's deserialize() will call subghz_custom_btn_get()
+             * to pick the right button code. */
+            car_emulate_apply_button(subghz, key);
+
+            /* Only update the counter in fff_data; the protocol handles Btn. */
+            car_emulate_update_fff(subghz, s_state->current_counter);
+
+            s_state->is_transmitting = true;
+            s_state->stop_pending    = false;
+            s_state->tx_start_tick   = (uint32_t)furi_get_tick();
+
+            uint8_t cur_btn = subghz_custom_btn_get();
+            if(!car_emulate_start_tx(subghz, cur_btn)) {
+                s_state->is_transmitting = false;
+                notification_message(subghz->notifications, &sequence_error);
+            }
+
+            car_emulate_refresh_view(subghz);
+            consumed = true;
+
+        /* ── Stop ── */
+        } else if(event.event == SubGhzCustomEventCarEmulateStop) {
+            if(s_state->is_transmitting &&
+               subghz->state_notifications == SubGhzNotificationStateTx) {
+
+                uint32_t elapsed = (uint32_t)furi_get_tick() - s_state->tx_start_tick;
+                if(elapsed >= MIN_TX_TICKS) {
+                    car_emulate_stop_tx(subghz);
+                    s_state->is_transmitting = false;
+                    s_state->stop_pending    = false;
+                } else {
+                    s_state->stop_pending = true;
+                }
+            }
+            car_emulate_refresh_view(subghz);
+            consumed = true;
+
+        /* ── Exit ── */
+        } else if(event.event == SubGhzCustomEventCarEmulateExit) {
+            if(subghz->state_notifications == SubGhzNotificationStateTx) {
+                car_emulate_stop_tx(subghz);
+            }
+            scene_manager_search_and_switch_to_previous_scene(
+                subghz->scene_manager, SubGhzSceneSavedMenu);
+            consumed = true;
+        }
+
+    } else if(event.type == SceneManagerEventTypeTick) {
+
+        if(s_state->is_transmitting &&
+           subghz->state_notifications == SubGhzNotificationStateTx) {
+
+            /* Check if hardware is done */
+            if(subghz_devices_is_async_complete_tx(subghz->txrx->radio_device)) {
+                subghz->state_notifications = SubGhzNotificationStateIDLE;
+                subghz_txrx_stop(subghz->txrx);
+
+                if(s_state->stop_pending) {
+                    s_state->is_transmitting = false;
+                    s_state->stop_pending    = false;
+                    notification_message(subghz->notifications, &sequence_blink_stop);
+                }
+            } else {
+                /* Still transmitting – blink LED */
+                notification_message(subghz->notifications, &sequence_blink_magenta_10);
+            }
+
+            /* Enforce MIN_TX_TICKS stop gate */
+            if(s_state->stop_pending) {
+                uint32_t elapsed = (uint32_t)furi_get_tick() - s_state->tx_start_tick;
+                if(elapsed >= MIN_TX_TICKS) {
+                    car_emulate_stop_tx(subghz);
+                    s_state->is_transmitting = false;
+                    s_state->stop_pending    = false;
+                }
+            }
+        }
+
+        /* Refresh view every tick for animation */
+        car_emulate_refresh_view(subghz);
+        consumed = true;
+    }
+
+    return consumed;
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Scene on_exit
+ * ═════════════════════════════════════════════════════════════════════════*/
+void subghz_scene_car_emulate_on_exit(void* context) {
+    SubGhz* subghz = context;
+
+    if(subghz->state_notifications == SubGhzNotificationStateTx) {
+        car_emulate_stop_tx(subghz);
+    }
+
+    subghz->state_notifications = SubGhzNotificationStateIDLE;
+    notification_message(subghz->notifications, &sequence_blink_stop);
+
+    /* Clear view callbacks */
+    subghz_car_emulate_view_set_callback(subghz->car_emulate_view, NULL, NULL);
+
+    /* Free per-session state */
+    if(s_state) {
+        free(s_state);
+        s_state = NULL;
+    }
+}

applications/main/subghz/scenes/subghz_scene_car_emulate_settings.c

@@ -0,0 +1,109 @@
+/**
+ * Scene: CarEmulateSettings
+ * Toggle: Custom Emulate  Off / On
+ * Selector: TX Power (reuses the same table as Radio Settings)
+ * Both settings are persisted in SubGhzLastSettings.
+ */
+#include "../subghz_i.h"
+#include <lib/toolbox/value_index.h>
+
+#define TAG "SubGhzCarEmulateSettings"
+
+/* ── Toggle ──────────────────────────────────────────────────────────────── */
+static const char* const toggle_text[] = {"Off", "On"};
+
+static void subghz_scene_car_emulate_settings_toggle_changed(VariableItem* item) {
+    SubGhz* subghz = variable_item_get_context(item);
+    furi_assert(subghz);
+
+    uint8_t index = variable_item_get_current_value_index(item);
+    variable_item_set_current_value_text(item, toggle_text[index]);
+
+    subghz->last_settings->custom_car_emulate = (index == 1);
+    subghz_last_settings_save(subghz->last_settings);
+}
+
+/* ── TX Power ────────────────────────────────────────────────────────────── */
+/* Must match the table in subghz_scene_radio_settings.c exactly */
+#define CE_TX_POWER_COUNT 9
+static const char* const ce_tx_power_text[CE_TX_POWER_COUNT] = {
+    "Preset",   /* index 0 → use whatever the preset has baked in */
+    "10dBm +",
+    "7dBm",
+    "5dBm",
+    "0dBm",
+    "-10dBm",
+    "-15dBm",
+    "-20dBm",
+    "-30dBm",
+};
+
+static void subghz_scene_car_emulate_settings_power_changed(VariableItem* item) {
+    SubGhz* subghz = variable_item_get_context(item);
+    furi_assert(subghz);
+
+    uint8_t index = variable_item_get_current_value_index(item);
+    variable_item_set_current_value_text(item, ce_tx_power_text[index]);
+
+    /* Mirror the same fields that Radio Settings touches so the value is
+     * visible everywhere and survives app restart. */
+    subghz->tx_power                  = index;
+    subghz->last_settings->tx_power   = index;
+    subghz_last_settings_save(subghz->last_settings);
+
+    /* Patch the live preset buffer immediately so any subsequent TX in this
+     * session uses the new power without needing a restart. */
+    SubGhzRadioPreset preset = subghz_txrx_get_preset(subghz->txrx);
+    if(preset.data && preset.data_size > 0) {
+        subghz_txrx_set_tx_power(preset.data, preset.data_size, index);
+    }
+}
+
+/* ── Scene callbacks ─────────────────────────────────────────────────────── */
+void subghz_scene_car_emulate_settings_on_enter(void* context) {
+    SubGhz* subghz = context;
+    furi_assert(subghz);
+
+    VariableItemList* list = subghz->variable_item_list;
+    variable_item_list_reset(list);
+
+    /* ── Row 1: Custom Emulate toggle ── */
+    VariableItem* item = variable_item_list_add(
+        list,
+        "Custom Emulate",
+        2,
+        subghz_scene_car_emulate_settings_toggle_changed,
+        subghz);
+
+    uint8_t toggle_idx = subghz->last_settings->custom_car_emulate ? 1 : 0;
+    variable_item_set_current_value_index(item, toggle_idx);
+    variable_item_set_current_value_text(item, toggle_text[toggle_idx]);
+
+    /* ── Row 2: TX Power ── */
+    item = variable_item_list_add(
+        list,
+        "TX Power",
+        CE_TX_POWER_COUNT,
+        subghz_scene_car_emulate_settings_power_changed,
+        subghz);
+
+    /* Clamp stored value to valid range in case settings file is corrupt */
+    uint8_t power_idx = subghz->tx_power;
+    if(power_idx >= CE_TX_POWER_COUNT) power_idx = 0;
+
+    variable_item_set_current_value_index(item, power_idx);
+    variable_item_set_current_value_text(item, ce_tx_power_text[power_idx]);
+
+    view_dispatcher_switch_to_view(subghz->view_dispatcher, SubGhzViewIdVariableItemList);
+}
+
+bool subghz_scene_car_emulate_settings_on_event(void* context, SceneManagerEvent event) {
+    UNUSED(context);
+    UNUSED(event);
+    return false;
+}
+
+void subghz_scene_car_emulate_settings_on_exit(void* context) {
+    SubGhz* subghz = context;
+    variable_item_list_reset(subghz->variable_item_list);
+}

applications/main/subghz/scenes/subghz_scene_config.h

@@ -34,3 +34,5 @@ ADD_SCENE(subghz, keeloq_decrypt, KeeloqDecrypt)
 ADD_SCENE(subghz, keeloq_bf2, KeeloqBf2)
 ADD_SCENE(subghz, kl_bf_cleanup, KlBfCleanup)
 ADD_SCENE(subghz, counter_bf, CounterBf)
+ADD_SCENE(subghz, car_emulate, CarEmulate)
+ADD_SCENE(subghz, car_emulate_settings, CarEmulateSettings)

applications/main/subghz/scenes/subghz_scene_saved_menu.c

@@ -6,7 +6,8 @@ enum SubmenuIndex {
     SubmenuIndexEdit,
     SubmenuIndexDelete,
     SubmenuIndexSignalSettings,
-    SubmenuIndexCounterBf
+    SubmenuIndexCounterBf,                  /* <-- comma was missing here */
+    SubmenuIndexCarEmulateSettings,
 };
 
 void subghz_scene_saved_menu_submenu_callback(void* context, uint32_t index) {
@@ -77,6 +78,13 @@ void subghz_scene_saved_menu_on_enter(void* context) {
         subghz_scene_saved_menu_submenu_callback,
         subghz);
 
+    submenu_add_item(
+        subghz->submenu,
+        "Custom Emulate Settings",
+        SubmenuIndexCarEmulateSettings,
+        subghz_scene_saved_menu_submenu_callback,
+        subghz);
+
     if(furi_hal_rtc_is_flag_set(FuriHalRtcFlagDebug)) {
         submenu_add_item(
             subghz->submenu,
@@ -109,7 +117,22 @@ bool subghz_scene_saved_menu_on_event(void* context, SceneManagerEvent event) {
         if(event.event == SubmenuIndexEmulate) {
             scene_manager_set_scene_state(
                 subghz->scene_manager, SubGhzSceneSavedMenu, SubmenuIndexEmulate);
-            scene_manager_next_scene(subghz->scene_manager, SubGhzSceneTransmitter);
+
+            bool use_custom = subghz->last_settings->custom_car_emulate;
+            if(use_custom) {
+                FlipperFormat* fff = subghz_txrx_get_fff_data(subghz->txrx);
+                uint32_t cnt_tmp = 0;
+                flipper_format_rewind(fff);
+                if(!flipper_format_read_uint32(fff, "Cnt", &cnt_tmp, 1)) {
+                    use_custom = false;
+                }
+            }
+
+            if(use_custom) {
+                scene_manager_next_scene(subghz->scene_manager, SubGhzSceneCarEmulate);
+            } else {
+                scene_manager_next_scene(subghz->scene_manager, SubGhzSceneTransmitter);
+            }
             return true;
         } else if(event.event == SubmenuIndexPsaDecrypt) {
             scene_manager_set_scene_state(
@@ -136,6 +159,14 @@ bool subghz_scene_saved_menu_on_event(void* context, SceneManagerEvent event) {
                 subghz->scene_manager, SubGhzSceneSavedMenu, SubmenuIndexCounterBf);
             scene_manager_next_scene(subghz->scene_manager, SubGhzSceneCounterBf);
             return true;
+        } else if(event.event == SubmenuIndexCarEmulateSettings) {
+            /* <-- was outside the if block due to misplaced brace, now fixed */
+            scene_manager_set_scene_state(
+                subghz->scene_manager,
+                SubGhzSceneSavedMenu,
+                SubmenuIndexCarEmulateSettings);
+            scene_manager_next_scene(subghz->scene_manager, SubGhzSceneCarEmulateSettings);
+            return true;
         }
     }
     return false;

applications/main/subghz/subghz.c

@@ -206,6 +206,12 @@ SubGhz* subghz_alloc(bool alloc_for_tx_only) {
         SubGhzViewIdKeeloqDecrypt,
         subghz_view_keeloq_decrypt_get_view(subghz->subghz_keeloq_decrypt));
 
+    subghz->car_emulate_view = subghz_car_emulate_view_alloc();
+    view_dispatcher_add_view(
+        subghz->view_dispatcher,
+        SubGhzViewIdCarEmulate,
+        subghz_car_emulate_view_get_view(subghz->car_emulate_view));
+
     //init threshold rssi
     subghz->threshold_rssi = subghz_threshold_rssi_alloc();
 
@@ -321,6 +327,10 @@ void subghz_free(SubGhz* subghz, bool alloc_for_tx_only) {
     view_dispatcher_remove_view(subghz->view_dispatcher, SubGhzViewIdKeeloqDecrypt);
     subghz_view_keeloq_decrypt_free(subghz->subghz_keeloq_decrypt);
 
+    // Custom car-emulate view
+    view_dispatcher_remove_view(subghz->view_dispatcher, SubGhzViewIdCarEmulate);
+    subghz_car_emulate_view_free(subghz->car_emulate_view);
+
     // Read RAW
     view_dispatcher_remove_view(subghz->view_dispatcher, SubGhzViewIdReadRAW);
     subghz_read_raw_free(subghz->subghz_read_raw);

applications/main/subghz/subghz_i.h

@@ -43,6 +43,8 @@
 #include "helpers/subghz_txrx.h"
 #include "helpers/subghz_keeloq_keys.h"
 
+#include "views/subghz_car_emulate.h"
+
 #define SUBGHZ_MAX_LEN_NAME      64
 #define SUBGHZ_EXT_PRESET_NAME   true
 #define SUBGHZ_RAW_THRESHOLD_MIN (-90.0f)
@@ -76,6 +78,7 @@ struct SubGhz {
     SubGhzReadRAW* subghz_read_raw;
     SubGhzViewPsaDecrypt* subghz_psa_decrypt;
     SubGhzViewKeeloqDecrypt* subghz_keeloq_decrypt;
+    SubGhzCarEmulateView* car_emulate_view;
     bool raw_send_only;
 
     bool save_datetime_set;

applications/main/subghz/subghz_last_settings.c

@@ -22,6 +22,7 @@
 #define SUBGHZ_LAST_SETTING_FIELD_HOPPING_THRESHOLD                 "HoppingThreshold"
 #define SUBGHZ_LAST_SETTING_FIELD_LED_AND_POWER_AMP                 "LedAndPowerAmp"
 #define SUBGHZ_LAST_SETTING_FIELD_TX_POWER                          "TXPower"
+#define SUBGHZ_LAST_SETTING_FIELD_CUSTOM_CAR_EMULATE                "CustomCarEmulate"
 
 SubGhzLastSettings* subghz_last_settings_alloc(void) {
     SubGhzLastSettings* instance = malloc(sizeof(SubGhzLastSettings));
@@ -163,6 +164,14 @@ void subghz_last_settings_load(SubGhzLastSettings* instance, size_t preset_count
                    1)) {
                 flipper_format_rewind(fff_data_file);
             }
+             if(!flipper_format_read_bool(
+                    fff_data_file,
+                    SUBGHZ_LAST_SETTING_FIELD_CUSTOM_CAR_EMULATE,
+                    &instance->custom_car_emulate,
+                    1)) {
+                instance->custom_car_emulate = false;
+                flipper_format_rewind(fff_data_file);
+            }
 
         } while(0);
     } else {
@@ -281,6 +290,13 @@ bool subghz_last_settings_save(SubGhzLastSettings* instance) {
                file, SUBGHZ_LAST_SETTING_FIELD_LED_AND_POWER_AMP, &instance->leds_and_amp, 1)) {
             break;
         }
+        if(!flipper_format_write_bool(
+               file,
+               SUBGHZ_LAST_SETTING_FIELD_CUSTOM_CAR_EMULATE,
+               &instance->custom_car_emulate,
+               1)) {
+            break;
+        }
 
         saved = true;
     } while(0);

applications/main/subghz/subghz_last_settings.h

@@ -30,6 +30,7 @@ typedef struct {
     float preset_hopping_threshold;
     bool leds_and_amp;
     uint8_t tx_power;
+    bool custom_car_emulate;
 } SubGhzLastSettings;
 
 SubGhzLastSettings* subghz_last_settings_alloc(void);

applications/main/subghz/views/subghz_car_emulate.c

@@ -0,0 +1,264 @@
+#include "subghz_car_emulate.h"
+#include "../helpers/subghz_custom_event.h"
+
+#include <gui/elements.h>
+#include <input/input.h>
+#include <furi.h>
+
+#define TAG "SubGhzCarEmulateView"
+
+/* ── Model ──────────────────────────────────────────────────────────────── */
+typedef struct {
+    char     protocol_name[32];
+    uint32_t serial;
+    uint32_t counter;
+    uint32_t original_counter;
+    uint32_t freq;
+    char     preset[12];
+    bool     is_transmitting;
+    uint8_t  anim_frame;
+    char     label_ok[12];
+    char     label_up[12];
+    char     label_down[12];
+    char     label_left[12];
+    char     label_right[12];
+} SubGhzCarEmulateViewModel;
+
+/* ── Handle ─────────────────────────────────────────────────────────────── */
+struct SubGhzCarEmulateView {
+    View*                        view;
+    SubGhzCarEmulateViewCallback callback;
+    void*                        context;
+};
+
+/* ── Draw ───────────────────────────────────────────────────────────────── */
+static void subghz_car_emulate_view_draw(Canvas* canvas, void* model_ptr) {
+    SubGhzCarEmulateViewModel* m = model_ptr;
+
+    m->anim_frame = (m->anim_frame + 1) % 8;
+
+    canvas_clear(canvas);
+
+    /* Header bar */
+    canvas_draw_box(canvas, 0, 0, 128, 11);
+    canvas_invert_color(canvas);
+    canvas_set_font(canvas, FontSecondary);
+    canvas_draw_str_aligned(canvas, 64, 2, AlignCenter, AlignTop, m->protocol_name);
+    canvas_invert_color(canvas);
+
+    /* Info row 1: serial + counter */
+    canvas_set_font(canvas, FontSecondary);
+    char buf[32];
+
+    if(m->serial <= 0xFFFFFFUL) {
+        snprintf(buf, sizeof(buf), "SN:%06lX", (unsigned long)(m->serial & 0xFFFFFFUL));
+    } else {
+        snprintf(buf, sizeof(buf), "SN:%08lX", (unsigned long)m->serial);
+    }
+    canvas_draw_str(canvas, 2, 20, buf);
+
+    snprintf(buf, sizeof(buf), "CNT:%04lX", (unsigned long)m->counter);
+    canvas_draw_str(canvas, 68, 20, buf);
+
+    if(m->counter > m->original_counter) {
+        snprintf(buf, sizeof(buf), "+%ld", (long)(m->counter - m->original_counter));
+        canvas_draw_str(canvas, 112, 20, buf);
+    }
+
+    /* Info row 2: frequency + preset */
+    snprintf(
+        buf,
+        sizeof(buf),
+        "F:%lu.%02lu",
+        (unsigned long)(m->freq / 1000000UL),
+        (unsigned long)((m->freq % 1000000UL) / 10000UL));
+    canvas_draw_str(canvas, 2, 30, buf);
+    canvas_draw_str(canvas, 95, 30, m->preset);
+
+    /* ── Button labels ── */
+    const uint8_t font_h = canvas_current_font_height(canvas);
+
+    /* Centre  → UNLOCK (OK button) */
+    {
+        const char* lbl        = m->label_ok;
+        uint8_t     w          = (uint8_t)(canvas_string_width(canvas, lbl) + 8U);
+        canvas_draw_rbox(canvas, 64 - w / 2, 45 - font_h / 2, w, font_h, 3);
+        canvas_invert_color(canvas);
+        canvas_draw_str_aligned(canvas, 64, 49, AlignCenter, AlignBottom, lbl);
+        canvas_invert_color(canvas);
+    }
+
+    /* Up → LOCK */
+    {
+        const char* lbl        = m->label_up;
+        uint8_t     w          = (uint8_t)(canvas_string_width(canvas, lbl) + 8U);
+        canvas_draw_rbox(canvas, 64 - w / 2, 33 - font_h / 2, w, font_h, 3);
+        canvas_invert_color(canvas);
+        canvas_draw_str_aligned(canvas, 64, 37, AlignCenter, AlignBottom, lbl);
+        canvas_invert_color(canvas);
+    }
+
+    /* Left → PANIC */
+    {
+        const char* lbl = m->label_left;
+        uint8_t     w   = (uint8_t)(canvas_string_width(canvas, lbl) + 8U);
+        canvas_draw_rbox(canvas, 0, 46 - font_h / 2, w, font_h, 3);
+        canvas_invert_color(canvas);
+        canvas_draw_str_aligned(canvas, w / 2, 50, AlignCenter, AlignBottom, lbl);
+        canvas_invert_color(canvas);
+    }
+
+    /* Right → generic extra */
+    {
+        const char* lbl = m->label_right;
+        uint8_t     w   = (uint8_t)(canvas_string_width(canvas, lbl) + 8U);
+        canvas_draw_rbox(canvas, 127 - w, 46 - font_h / 2, w, font_h, 3);
+        canvas_invert_color(canvas);
+        canvas_draw_str_aligned(canvas, 127 - w / 2, 50, AlignCenter, AlignBottom, lbl);
+        canvas_invert_color(canvas);
+    }
+
+    /* Down → BOOT */
+    {
+        const char* lbl = m->label_down;
+        uint8_t     w   = (uint8_t)(canvas_string_width(canvas, lbl) + 8U);
+        canvas_draw_rbox(canvas, 64 - w / 2, 57 - font_h / 2, w, font_h, 3);
+        canvas_invert_color(canvas);
+        canvas_draw_str_aligned(canvas, 64, 61, AlignCenter, AlignBottom, lbl);
+        canvas_invert_color(canvas);
+    }
+
+    /* TX overlay */
+    if(m->is_transmitting) {
+        canvas_draw_rbox(canvas, 24, 18, 80, 18, 3);
+        canvas_invert_color(canvas);
+        int wave = m->anim_frame % 3;
+        canvas_draw_str(canvas, 28 + wave * 2, 25, ")))");
+        canvas_set_font(canvas, FontPrimary);
+        canvas_draw_str_aligned(canvas, 64, 24, AlignCenter, AlignCenter, "TX");
+        canvas_invert_color(canvas);
+    }
+}
+
+/* ── Input ──────────────────────────────────────────────────────────────── */
+static bool subghz_car_emulate_view_input(InputEvent* event, void* context) {
+    SubGhzCarEmulateView* instance = context;
+    furi_assert(instance);
+
+    if(event->type == InputTypePress) {
+        if(event->key == InputKeyBack) {
+            if(instance->callback) {
+                instance->callback(SubGhzCustomEventCarEmulateExit, instance->context);
+            }
+            return true;
+        }
+
+        /* Any directional / OK key → start TX */
+        if(instance->callback) {
+            /* Pack the raw InputKey into the upper bits of the event so the
+               scene can read which button was pressed.
+               Lower 16 bits = SubGhzCustomEventCarEmulateTransmit marker,
+               upper 16 bits = InputKey value. */
+            uint32_t ev = ((uint32_t)event->key << 16) |
+                          (uint32_t)SubGhzCustomEventCarEmulateTransmit;
+            instance->callback(ev, instance->context);
+        }
+        return true;
+
+    } else if(event->type == InputTypeRelease) {
+        if(event->key != InputKeyBack) {
+            if(instance->callback) {
+                instance->callback(SubGhzCustomEventCarEmulateStop, instance->context);
+            }
+            return true;
+        }
+    }
+
+    return false;
+}
+
+/* ── Alloc / Free ───────────────────────────────────────────────────────── */
+SubGhzCarEmulateView* subghz_car_emulate_view_alloc(void) {
+    SubGhzCarEmulateView* instance = malloc(sizeof(SubGhzCarEmulateView));
+    furi_check(instance);
+
+    instance->view     = view_alloc();
+    instance->callback = NULL;
+    instance->context  = NULL;
+
+    view_set_context(instance->view, instance);
+    view_allocate_model(instance->view, ViewModelTypeLocking, sizeof(SubGhzCarEmulateViewModel));
+    view_set_draw_callback(instance->view, subghz_car_emulate_view_draw);
+    view_set_input_callback(instance->view, subghz_car_emulate_view_input);
+
+    return instance;
+}
+
+void subghz_car_emulate_view_free(SubGhzCarEmulateView* instance) {
+    furi_check(instance);
+    view_free(instance->view);
+    free(instance);
+}
+
+View* subghz_car_emulate_view_get_view(SubGhzCarEmulateView* instance) {
+    furi_check(instance);
+    return instance->view;
+}
+
+void subghz_car_emulate_view_set_callback(
+    SubGhzCarEmulateView* instance,
+    SubGhzCarEmulateViewCallback callback,
+    void* context) {
+    furi_check(instance);
+    instance->callback = callback;
+    instance->context  = context;
+}
+
+void subghz_car_emulate_view_set_data(
+    SubGhzCarEmulateView* instance,
+    const char*  protocol_name,
+    uint32_t     serial,
+    uint32_t     counter,
+    uint32_t     original_counter,
+    uint32_t     freq,
+    const char*  preset,
+    bool         is_transmitting) {
+    furi_check(instance);
+
+    with_view_model(
+        instance->view,
+        SubGhzCarEmulateViewModel * m,
+        {
+            strncpy(m->protocol_name, protocol_name, sizeof(m->protocol_name) - 1);
+            m->protocol_name[sizeof(m->protocol_name) - 1] = '\0';
+            m->serial           = serial;
+            m->counter          = counter;
+            m->original_counter = original_counter;
+            m->freq             = freq;
+            strncpy(m->preset, preset, sizeof(m->preset) - 1);
+            m->preset[sizeof(m->preset) - 1] = '\0';
+            m->is_transmitting  = is_transmitting;
+        },
+        true);
+}
+
+void subghz_car_emulate_view_set_labels(
+    SubGhzCarEmulateView* instance,
+    const char* ok,
+    const char* up,
+    const char* down,
+    const char* left,
+    const char* right) {
+    furi_check(instance);
+    with_view_model(
+        instance->view,
+        SubGhzCarEmulateViewModel * m,
+        {
+            strncpy(m->label_ok,    ok    ? ok    : "",  sizeof(m->label_ok)    - 1);
+            strncpy(m->label_up,    up    ? up    : "",  sizeof(m->label_up)    - 1);
+            strncpy(m->label_down,  down  ? down  : "",  sizeof(m->label_down)  - 1);
+            strncpy(m->label_left,  left  ? left  : "",  sizeof(m->label_left)  - 1);
+            strncpy(m->label_right, right ? right : "",  sizeof(m->label_right) - 1);
+        },
+        true);
+}

applications/main/subghz/views/subghz_car_emulate.h

@@ -0,0 +1,45 @@
+#pragma once
+
+#include <gui/view.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct SubGhzCarEmulateView SubGhzCarEmulateView;
+
+typedef void (*SubGhzCarEmulateViewCallback)(uint32_t event, void* context);
+
+SubGhzCarEmulateView* subghz_car_emulate_view_alloc(void);
+void subghz_car_emulate_view_free(SubGhzCarEmulateView* instance);
+View* subghz_car_emulate_view_get_view(SubGhzCarEmulateView* instance);
+
+void subghz_car_emulate_view_set_callback(
+    SubGhzCarEmulateView* instance,
+    SubGhzCarEmulateViewCallback callback,
+    void* context);
+
+/** Update the fields shown on the view.
+ *  All strings are copied internally so the caller can free them after the call.
+ */
+void subghz_car_emulate_view_set_labels(
+    SubGhzCarEmulateView* instance,
+    const char* ok,
+    const char* up,
+    const char* down,
+    const char* left,
+    const char* right);
+
+void subghz_car_emulate_view_set_data(
+    SubGhzCarEmulateView* instance,
+    const char* protocol_name,
+    uint32_t serial,
+    uint32_t counter,
+    uint32_t original_counter,
+    uint32_t freq,
+    const char* preset,
+    bool is_transmitting);
+
+#ifdef __cplusplus
+}
+#endif

lib/subghz/blocks/custom_btn_i.h

@@ -16,3 +16,59 @@ void subghz_custom_btn_set_max(uint8_t b);
 void subghz_custom_btn_set_prog_mode(ProgMode prog_mode);
 
 ProgMode subghz_custom_btn_get_prog_mode(void);
+
+/**
+ * Helper macro: declare a static button-map table and the two
+ * conversion functions that every protocol with custom buttons needs.
+ *
+ * Usage in your protocol .c file:
+ *
+ *   SUBGHZ_CUSTOM_BTN_DEFINE_MAP(my_proto,
+ *       {SUBGHZ_CUSTOM_BTN_OK,    0x01},   // OK    → Lock
+ *       {SUBGHZ_CUSTOM_BTN_UP,    0x01},   // Up    → Lock
+ *       {SUBGHZ_CUSTOM_BTN_DOWN,  0x02},   // Down  → Unlock
+ *       {SUBGHZ_CUSTOM_BTN_LEFT,  0x04},   // Left  → Boot
+ *       {SUBGHZ_CUSTOM_BTN_RIGHT, 0x08},   // Right → Panic
+ *   )
+ *
+ * This generates:
+ *   static uint8_t my_proto_custom_btn_to_code(uint8_t custom_btn);
+ *   static uint8_t my_proto_code_to_custom_btn(uint8_t code);
+ *   static const uint8_t my_proto_custom_btn_max;
+ */
+
+typedef struct {
+    uint8_t custom_btn_id;  /* SUBGHZ_CUSTOM_BTN_OK / UP / DOWN / LEFT / RIGHT */
+    uint8_t protocol_code;  /* the actual byte the protocol puts in the frame   */
+} SubGhzCustomBtnEntry;
+
+#define SUBGHZ_CUSTOM_BTN_DEFINE_MAP(prefix_, ...)                              \
+    static const SubGhzCustomBtnEntry prefix_##_btn_map[] = {__VA_ARGS__};      \
+    static const uint8_t prefix_##_custom_btn_max =                             \
+        (sizeof(prefix_##_btn_map) / sizeof(SubGhzCustomBtnEntry)) - 1U;        \
+                                                                                \
+    static uint8_t prefix_##_custom_btn_to_code(uint8_t custom_btn) {           \
+        for(size_t i = 0; i < sizeof(prefix_##_btn_map) /                       \
+                              sizeof(SubGhzCustomBtnEntry); i++) {              \
+            if(prefix_##_btn_map[i].custom_btn_id == custom_btn)                \
+                return prefix_##_btn_map[i].protocol_code;                      \
+        }                                                                       \
+        /* fallback: return whatever OK maps to */                              \
+        return prefix_##_btn_map[0].protocol_code;                              \
+    }                                                                           \
+                                                                                \
+    static uint8_t prefix_##_code_to_custom_btn(uint8_t code) {                 \
+        for(size_t i = 0; i < sizeof(prefix_##_btn_map) /                       \
+                              sizeof(SubGhzCustomBtnEntry); i++) {              \
+            if(prefix_##_btn_map[i].protocol_code == code)                      \
+                return prefix_##_btn_map[i].custom_btn_id;                      \
+        }                                                                       \
+        return SUBGHZ_CUSTOM_BTN_OK;                                            \
+    }                                                                           \
+                                                                                \
+    static void prefix_##_custom_btn_init(uint8_t current_code) {               \
+        uint8_t original = prefix_##_code_to_custom_btn(current_code);          \
+        if(subghz_custom_btn_get_original() == 0)                               \
+            subghz_custom_btn_set_original(original);                           \
+        subghz_custom_btn_set_max(prefix_##_custom_btn_max);                    \
+    }

lib/subghz/protocols/ford_v2.c

@@ -3,6 +3,7 @@
 #include <string.h>
 #include <lib/toolbox/manchester_decoder.h>
 #include <lib/toolbox/manchester_encoder.h>
+#include <lib/subghz/blocks/custom_btn_i.h>
 
 #define FORD_V2_TE_SHORT 200U
 #define FORD_V2_TE_LONG 400U
@@ -34,6 +35,16 @@
 #define FORD_V2_PREAMBLE_COUNT_MAX 0xFFFFU
 #define FORD_V2_ENCODER_DEFAULT_REPEAT 10U
 
+SUBGHZ_CUSTOM_BTN_DEFINE_MAP(
+    ford_v2,
+    {SUBGHZ_CUSTOM_BTN_OK,    0x11},   /* OK    → Unlock       */
+    {SUBGHZ_CUSTOM_BTN_UP,    0x10},   /* Up    → Lock         */
+    {SUBGHZ_CUSTOM_BTN_DOWN,  0x13},   /* Down  → Trunk        */
+    {SUBGHZ_CUSTOM_BTN_LEFT,  0x14},   /* Left  → Panic        */
+    {SUBGHZ_CUSTOM_BTN_RIGHT, 0x15},   /* Right → RemoteStart  */
+)
+
+
 static const uint16_t ford_v2_sync_shift16_inv =
     (uint16_t)(~(((uint16_t)FORD_V2_SYNC_0 << 8) | (uint16_t)FORD_V2_SYNC_1));
 
@@ -208,6 +219,10 @@ static bool ford_v2_decoder_commit_frame(SubGhzProtocolDecoderFordV2* instance)
         return false;
     }
 
+    /* Register this protocol's button map with the custom_btn system so the
+     * standard transmitter view can show UP/DOWN/LEFT/RIGHT cycling. */
+    ford_v2_custom_btn_init(instance->generic.btn);
+
     if(instance->base.callback) {
         instance->base.callback(&instance->base, instance->base.context);
     }
@@ -461,26 +476,44 @@ static SubGhzProtocolStatus ford_v2_encoder_deserialize_read_header(
     return SubGhzProtocolStatusOk;
 }
 
-static SubGhzProtocolStatus ford_v2_encoder_deserialize_validate_and_pack(SubGhzProtocolEncoderFordV2* instance) {
+static SubGhzProtocolStatus ford_v2_encoder_deserialize_validate_and_pack(
+    SubGhzProtocolEncoderFordV2* instance) {
+
     ford_v2_encoder_rebuild_raw_from_payload(instance);
 
     if(!ford_v2_button_is_valid(instance->raw_bytes[6])) {
         return SubGhzProtocolStatusErrorParserOthers;
     }
 
+    uint16_t cnt = (uint16_t)(
+        (((uint16_t)(instance->raw_bytes[7] & 0x7FU)) << 9) |
+        (((uint16_t)instance->raw_bytes[8]) << 1) |
+        ((uint16_t)(instance->raw_bytes[9] >> 7)));
+
+    cnt = (cnt + 1U) & 0x7FFFU;
+
+    // raw_bytes[7] bits [6:0] = cnt[14:8], bit[7] = parity(btn)
+    instance->raw_bytes[7] = (instance->raw_bytes[7] & 0x80U) |
+                             (uint8_t)((cnt >> 9) & 0x7FU);
+    instance->raw_bytes[8] = (uint8_t)((cnt >> 1) & 0xFFU);
+    // raw_bytes[9] bit[7] = cnt[0], bits[6:0] = tail
+    instance->raw_bytes[9] = (instance->raw_bytes[9] & 0x7FU) |
+                             (uint8_t)((cnt & 1U) << 7);
+
     ford_v2_encoder_refresh_data_from_raw(instance);
+
     instance->generic.btn = instance->raw_bytes[6];
-    instance->generic.serial = ((uint32_t)instance->raw_bytes[2] << 24) |
-                               ((uint32_t)instance->raw_bytes[3] << 16) |
-                               ((uint32_t)instance->raw_bytes[4] << 8) |
-                               (uint32_t)instance->raw_bytes[5];
-    instance->generic.cnt = (uint16_t)((((uint16_t)(instance->raw_bytes[7] & 0x7FU)) << 9) |
-                                       (((uint16_t)instance->raw_bytes[8]) << 1) |
-                                       ((uint16_t)(instance->raw_bytes[9] >> 7)));
+    instance->generic.serial =
+        ((uint32_t)instance->raw_bytes[2] << 24) |
+        ((uint32_t)instance->raw_bytes[3] << 16) |
+        ((uint32_t)instance->raw_bytes[4] << 8) |
+        (uint32_t)instance->raw_bytes[5];
+    instance->generic.cnt = cnt;
 
     return SubGhzProtocolStatusOk;
 }
 
+
 static void ford_v2_encoder_deserialize_apply_repeat(SubGhzProtocolEncoderFordV2* instance, FlipperFormat* flipper_format) {
     flipper_format_rewind(flipper_format);
     uint32_t repeat = FORD_V2_ENCODER_DEFAULT_REPEAT;
@@ -523,13 +556,36 @@ SubGhzProtocolStatus
     FuriString* temp_str = furi_string_alloc();
     furi_check(temp_str);
 
-    SubGhzProtocolStatus ret = ford_v2_encoder_deserialize_read_header(instance, flipper_format, temp_str);
+    SubGhzProtocolStatus ret =
+        ford_v2_encoder_deserialize_read_header(instance, flipper_format, temp_str);
 
     if(ret == SubGhzProtocolStatusOk) {
         ret = ford_v2_encoder_deserialize_validate_and_pack(instance);
     }
 
     if(ret == SubGhzProtocolStatusOk) {
+        ford_v2_custom_btn_init(instance->raw_bytes[6]);
+
+        uint8_t btn_sel = subghz_custom_btn_get();
+        if(btn_sel != SUBGHZ_CUSTOM_BTN_OK) {
+            uint8_t new_code = ford_v2_custom_btn_to_code(btn_sel);
+            if(ford_v2_button_is_valid(new_code)) {
+                instance->raw_bytes[6] = new_code;
+                const uint8_t k7_msb =
+                    (uint8_t)(ford_v2_uint8_parity(new_code) << 7);
+                instance->raw_bytes[7] =
+                    (instance->raw_bytes[7] & 0x7FU) | k7_msb;
+                ford_v2_encoder_refresh_data_from_raw(instance);
+                instance->generic.btn = new_code;
+            }
+        }
+
+        instance->extra_data = 0;
+        for(uint8_t i = 0; i < FORD_V2_TAIL_RAW_BYTE_COUNT; i++) {
+            instance->extra_data =
+                (instance->extra_data << 8) | (uint64_t)instance->raw_bytes[8U + i];
+        }
+
         ford_v2_encoder_deserialize_apply_repeat(instance, flipper_format);
         ford_v2_encoder_build_upload(instance);
         instance->encoder.is_running = true;
@@ -539,6 +595,7 @@ SubGhzProtocolStatus
     return ret;
 }
 
+
 void subghz_protocol_encoder_ford_v2_stop(void* context) {
     furi_check(context);
     SubGhzProtocolEncoderFordV2* instance = context;
@@ -740,6 +797,25 @@ SubGhzProtocolStatus subghz_protocol_decoder_ford_v2_deserialize(
         return SubGhzProtocolStatusErrorParserOthers;
     }
 
+    /* Keep custom_btn in sync when loading from file. */
+    ford_v2_custom_btn_init(instance->generic.btn);
+
+    uint8_t btn_sel = subghz_custom_btn_get();
+    if(btn_sel != SUBGHZ_CUSTOM_BTN_OK) {
+        uint8_t new_code = ford_v2_custom_btn_to_code(btn_sel);
+        if(ford_v2_button_is_valid(new_code)) {
+            instance->generic.btn  = new_code;
+            instance->raw_bytes[6] = new_code;
+            instance->raw_bytes[7] = (instance->raw_bytes[7] & 0x7FU) |
+                                     (uint8_t)(ford_v2_uint8_parity(new_code) << 7);
+            instance->generic.data = 0;
+            for(uint8_t i = 0; i < FORD_V2_KEY_BYTE_COUNT; i++) {
+                instance->generic.data =
+                    (instance->generic.data << 8) | (uint64_t)instance->raw_bytes[i];
+            }
+        }
+    }
+
     return ret;
 }
 

lib/subghz/protocols/land_rover_v0.c

@@ -0,0 +1,984 @@
+#include "land_rover_v0.h"
+
+#include <string.h>
+
+#define TAG "LandRoverV0"
+
+static const SubGhzBlockConst subghz_protocol_land_rover_v0_const = {
+    .te_short                = 250,
+    .te_long                 = 500,
+    .te_delta                = 100,
+    .min_count_bit_for_found = 81,
+};
+
+#define LAND_ROVER_V0_PREAMBLE_PAIRS     319U
+#define LAND_ROVER_V0_MIN_PREAMBLE_PAIRS 64U
+#define LAND_ROVER_V0_SYNC_US            750U
+#define LAND_ROVER_V0_SYNC_DELTA_US      120U
+#define LAND_ROVER_V0_UPLOAD_CAPACITY    1024U
+#define LAND_ROVER_V0_GAP_US             50000U
+
+#define LAND_ROVER_V0_BTN_UNKNOWN 0x00U
+#define LAND_ROVER_V0_BTN_LOCK    0x02U
+#define LAND_ROVER_V0_BTN_UNLOCK  0x04U
+
+#define LAND_ROVER_V0_SIG_UNLOCK 0xA285E3UL
+#define LAND_ROVER_V0_SIG_LOCK   0xC20363UL
+
+/* Extra FlipperFormat field names specific to this protocol */
+#define LAND_ROVER_V0_FF_BTNSIG    "BtnSig"
+#define LAND_ROVER_V0_FF_CHECK     "Check"
+#define LAND_ROVER_V0_FF_TAIL      "Tail"
+#define LAND_ROVER_V0_FF_EXTRA_BIT "ExtraBit"
+
+/* FlipperFormat field name aliases (replacing the external pp library's FF_* macros) */
+#define LR_FF_KEY    "Key"
+#define LR_FF_SERIAL "Serial"
+#define LR_FF_BTN    "Btn"
+#define LR_FF_CNT    "Cnt"
+
+/* ── Decoder struct ──────────────────────────────────────────────────────── */
+typedef struct SubGhzProtocolDecoderLandRoverV0 {
+    SubGhzProtocolDecoderBase base;
+    SubGhzBlockDecoder        decoder;
+    SubGhzBlockGeneric        generic;
+
+    uint16_t preamble_count;
+    uint8_t  raw[10];
+    uint8_t  bit_count;
+    bool     extra_bit;
+    bool     previous_bit;
+    bool     boundary_pad_skipped;
+    bool     pending_short;
+
+    uint64_t key;
+    uint16_t tail;
+    uint32_t command_signature;
+    uint32_t serial;
+    uint32_t count;
+    uint8_t  button;
+    uint8_t  check;
+    bool     check_ok;
+    bool     tail_ok;
+} SubGhzProtocolDecoderLandRoverV0;
+
+/* ── Encoder struct ──────────────────────────────────────────────────────── */
+typedef struct SubGhzProtocolEncoderLandRoverV0 {
+    SubGhzProtocolEncoderBase  base;
+    SubGhzProtocolBlockEncoder encoder;
+    SubGhzBlockGeneric         generic;
+
+    uint64_t key;
+    uint16_t tail;
+    uint32_t command_signature;
+    uint32_t serial;
+    uint32_t count;
+    uint8_t  button;
+    uint8_t  check;
+} SubGhzProtocolEncoderLandRoverV0;
+
+/* ── Decoder state machine steps ─────────────────────────────────────────── */
+typedef enum {
+    LandRoverV0DecoderStepReset = 0,
+    LandRoverV0DecoderStepPreambleLow,
+    LandRoverV0DecoderStepPreambleHigh,
+    LandRoverV0DecoderStepSyncLow,
+    LandRoverV0DecoderStepData,
+} LandRoverV0DecoderStep;
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Internal helpers replacing pp_* functions from the external app library
+ * ═════════════════════════════════════════════════════════════════════════*/
+
+/** Write a uint64_t into 8 bytes in big-endian order. */
+static inline void lr_u64_to_bytes_be(uint64_t val, uint8_t out[8]) {
+    for(int i = 7; i >= 0; i--) {
+        out[i] = (uint8_t)(val & 0xFFU);
+        val >>= 8;
+    }
+}
+
+/** Read 8 big-endian bytes and return a uint64_t. */
+static inline uint64_t lr_bytes_to_u64_be(const uint8_t in[8]) {
+    uint64_t val = 0;
+    for(int i = 0; i < 8; i++) {
+        val = (val << 8) | in[i];
+    }
+    return val;
+}
+
+/** Returns true when duration matches te_short within te_delta. */
+static inline bool lr_is_short(uint32_t duration) {
+    return DURATION_DIFF(duration, subghz_protocol_land_rover_v0_const.te_short) <
+           subghz_protocol_land_rover_v0_const.te_delta;
+}
+
+/** Returns true when duration matches te_long within te_delta. */
+static inline bool lr_is_long(uint32_t duration) {
+    return DURATION_DIFF(duration, subghz_protocol_land_rover_v0_const.te_long) <
+           subghz_protocol_land_rover_v0_const.te_delta;
+}
+
+/** Insert-or-update a single uint32 field in a FlipperFormat file. */
+static void lr_ff_write_u32(FlipperFormat* ff, const char* key, uint32_t val) {
+    flipper_format_insert_or_update_uint32(ff, key, &val, 1);
+}
+
+/** Read a single uint32 field from a FlipperFormat file. */
+static bool lr_ff_read_u32(FlipperFormat* ff, const char* key, uint32_t* out) {
+    return flipper_format_read_uint32(ff, key, out, 1);
+}
+
+/**
+ * Verify that the "Protocol" field in the FlipperFormat file matches the
+ * expected protocol name.  Returns SubGhzProtocolStatusOk on match.
+ */
+static SubGhzProtocolStatus lr_verify_protocol_name(
+    FlipperFormat* ff,
+    const char*    expected_name) {
+    FuriString* name = furi_string_alloc();
+    bool        ok   = false;
+    if(flipper_format_read_string(ff, "Protocol", name)) {
+        ok = furi_string_equal_str(name, expected_name);
+    }
+    furi_string_free(name);
+    return ok ? SubGhzProtocolStatusOk : SubGhzProtocolStatusErrorProtocolNotFound;
+}
+
+/**
+ * Read the "Repeat" field from a FlipperFormat file.
+ * Falls back to default_val when the field is absent.
+ */
+static uint16_t lr_encoder_read_repeat(FlipperFormat* ff, uint16_t default_val) {
+    uint32_t repeat = default_val;
+    flipper_format_rewind(ff);
+    if(!flipper_format_read_uint32(ff, "Repeat", &repeat, 1)) {
+        repeat = default_val;
+    }
+    return (uint16_t)repeat;
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Forward declarations for internal (static) helpers
+ * ═════════════════════════════════════════════════════════════════════════*/
+static uint8_t     land_rover_v0_button_from_signature(uint32_t signature);
+static const char* land_rover_v0_button_name(uint8_t button);
+static uint8_t     land_rover_v0_calculate_check(uint32_t count);
+static bool        land_rover_v0_calculate_tail_msb(uint32_t count);
+static uint16_t    land_rover_v0_calculate_tail(uint32_t count);
+static void        land_rover_v0_parse_key_fields(
+           uint64_t  key,
+           uint32_t* signature,
+           uint32_t* serial,
+           uint32_t* count,
+           uint8_t*  button,
+           uint8_t*  check);
+static bool land_rover_v0_validate_frame(
+    uint64_t key,
+    uint16_t tail,
+    bool     extra_bit,
+    bool*    check_ok,
+    bool*    tail_ok);
+static bool land_rover_v0_add_decoded_bit(
+    SubGhzProtocolDecoderLandRoverV0* instance,
+    bool                              bit);
+static bool land_rover_v0_process_transition(
+    SubGhzProtocolDecoderLandRoverV0* instance,
+    bool                              level,
+    uint32_t                          duration);
+static bool land_rover_v0_finish_frame(SubGhzProtocolDecoderLandRoverV0* instance);
+
+static bool land_rover_v0_encoder_add_level(
+    SubGhzProtocolEncoderLandRoverV0* instance,
+    size_t*                           index,
+    bool                              level,
+    uint32_t                          duration);
+static bool land_rover_v0_encoder_add_bit(
+    SubGhzProtocolEncoderLandRoverV0* instance,
+    size_t*                           index,
+    bool*                             previous_bit,
+    bool                              bit);
+static bool land_rover_v0_build_upload(SubGhzProtocolEncoderLandRoverV0* instance);
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Protocol descriptor tables
+ * ═════════════════════════════════════════════════════════════════════════*/
+const SubGhzProtocolDecoder subghz_protocol_land_rover_v0_decoder = {
+    .alloc         = subghz_protocol_decoder_land_rover_v0_alloc,
+    .free          = subghz_protocol_decoder_land_rover_v0_free,
+    .feed          = subghz_protocol_decoder_land_rover_v0_feed,
+    .reset         = subghz_protocol_decoder_land_rover_v0_reset,
+    .get_hash_data = subghz_protocol_decoder_land_rover_v0_get_hash_data,
+    .serialize     = subghz_protocol_decoder_land_rover_v0_serialize,
+    .deserialize   = subghz_protocol_decoder_land_rover_v0_deserialize,
+    .get_string    = subghz_protocol_decoder_land_rover_v0_get_string,
+};
+
+const SubGhzProtocolEncoder subghz_protocol_land_rover_v0_encoder = {
+    .alloc       = subghz_protocol_encoder_land_rover_v0_alloc,
+    .free        = subghz_protocol_encoder_land_rover_v0_free,
+    .deserialize = subghz_protocol_encoder_land_rover_v0_deserialize,
+    .stop        = subghz_protocol_encoder_land_rover_v0_stop,
+    .yield       = subghz_protocol_encoder_land_rover_v0_yield,
+};
+
+const SubGhzProtocol subghz_protocol_land_rover_v0 = {
+    .name    = LAND_ROVER_PROTOCOL_V0_NAME,
+    .type    = SubGhzProtocolTypeDynamic,
+    .flag    = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_FM |
+               SubGhzProtocolFlag_Decodable | SubGhzProtocolFlag_Load |
+               SubGhzProtocolFlag_Save      | SubGhzProtocolFlag_Send,
+    .decoder = &subghz_protocol_land_rover_v0_decoder,
+    .encoder = &subghz_protocol_land_rover_v0_encoder,
+};
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Protocol logic helpers
+ * ═════════════════════════════════════════════════════════════════════════*/
+
+static bool land_rover_v0_is_sync(uint32_t duration) {
+    return DURATION_DIFF(duration, LAND_ROVER_V0_SYNC_US) < LAND_ROVER_V0_SYNC_DELTA_US;
+}
+
+static uint8_t land_rover_v0_button_from_signature(uint32_t signature) {
+    if(signature == LAND_ROVER_V0_SIG_UNLOCK) return LAND_ROVER_V0_BTN_UNLOCK;
+    if(signature == LAND_ROVER_V0_SIG_LOCK)   return LAND_ROVER_V0_BTN_LOCK;
+    return LAND_ROVER_V0_BTN_UNKNOWN;
+}
+
+static const char* land_rover_v0_button_name(uint8_t button) {
+    switch(button) {
+    case LAND_ROVER_V0_BTN_LOCK:   return "Lock";
+    case LAND_ROVER_V0_BTN_UNLOCK: return "Unlock";
+    default:                        return "Unknown";
+    }
+}
+
+static uint8_t land_rover_v0_calculate_check(uint32_t count) {
+    const uint8_t c0 =
+        ((count >> 1) ^ (count >> 2) ^ (count >> 3) ^ (count >> 4) ^ (count >> 6)) & 1U;
+    const uint8_t c1 =
+        ((count >> 0) ^ (count >> 2) ^ (count >> 3) ^ (count >> 4) ^ (count >> 5) ^
+         (count >> 6) ^ 1U) & 1U;
+    const uint8_t c2 =
+        ((count >> 1) ^ (count >> 3) ^ (count >> 4) ^ (count >> 5) ^ (count >> 6)) & 1U;
+    return (uint8_t)(c0 | (c1 << 1) | (c2 << 2));
+}
+
+static bool land_rover_v0_calculate_tail_msb(uint32_t count) {
+    const uint8_t tail =
+        ((count >> 0) ^ (count >> 2) ^ (count >> 4) ^ (count >> 5)) & 1U;
+    return tail != 0U;
+}
+
+static uint16_t land_rover_v0_calculate_tail(uint32_t count) {
+    return land_rover_v0_calculate_tail_msb(count) ? 0xFFFFU : 0x7FFFU;
+}
+
+static void land_rover_v0_parse_key_fields(
+    uint64_t  key,
+    uint32_t* signature,
+    uint32_t* serial,
+    uint32_t* count,
+    uint8_t*  button,
+    uint8_t*  check) {
+
+    uint8_t key_bytes[8];
+    lr_u64_to_bytes_be(key, key_bytes);
+
+    const uint32_t sig =
+        ((uint32_t)key_bytes[0] << 16) | ((uint32_t)key_bytes[1] << 8) | key_bytes[2];
+    const uint32_t sn =
+        ((uint32_t)key_bytes[3] << 16) | ((uint32_t)key_bytes[4] << 8) | key_bytes[5];
+    const uint32_t cnt =
+        ((uint32_t)key_bytes[6] << 1) | ((key_bytes[7] >> 7) & 1U);
+
+    if(signature) *signature = sig;
+    if(serial)    *serial    = sn;
+    if(count)     *count     = cnt;
+    if(button)    *button    = land_rover_v0_button_from_signature(sig);
+    if(check)     *check     = key_bytes[7] & 0x07U;
+}
+
+static bool land_rover_v0_validate_frame(
+    uint64_t key,
+    uint16_t tail,
+    bool     extra_bit,
+    bool*    check_ok,
+    bool*    tail_ok) {
+
+    uint8_t key_bytes[8];
+    lr_u64_to_bytes_be(key, key_bytes);
+
+    const uint32_t count          = ((uint32_t)key_bytes[6] << 1) | ((key_bytes[7] >> 7) & 1U);
+    const uint8_t  expected_check = land_rover_v0_calculate_check(count);
+    const uint16_t expected_tail  = land_rover_v0_calculate_tail(count);
+
+    const bool local_check_ok =
+        ((key_bytes[7] & 0x78U) == 0U) && ((key_bytes[7] & 0x07U) == expected_check);
+    const bool local_tail_ok = (tail == expected_tail) && extra_bit;
+
+    if(check_ok) *check_ok = local_check_ok;
+    if(tail_ok)  *tail_ok  = local_tail_ok;
+
+    return local_check_ok && local_tail_ok;
+}
+
+static bool land_rover_v0_add_decoded_bit(
+    SubGhzProtocolDecoderLandRoverV0* instance,
+    bool                              bit) {
+
+    if(instance->bit_count < 80U) {
+        const uint8_t byte_index = instance->bit_count / 8U;
+        const uint8_t bit_index  = 7U - (instance->bit_count % 8U);
+        if(bit) instance->raw[byte_index] |= (uint8_t)(1U << bit_index);
+    } else if(instance->bit_count == 80U) {
+        instance->extra_bit = bit;
+    } else {
+        return false;
+    }
+
+    instance->bit_count++;
+    return true;
+}
+
+static bool land_rover_v0_finish_frame(SubGhzProtocolDecoderLandRoverV0* instance) {
+    const uint64_t key  = lr_bytes_to_u64_be(instance->raw);
+    const uint16_t tail =
+        ((uint16_t)instance->raw[8] << 8) | instance->raw[9];
+
+    if(!land_rover_v0_validate_frame(
+           key, tail, instance->extra_bit,
+           &instance->check_ok, &instance->tail_ok)) {
+        return false;
+    }
+
+    instance->key  = key;
+    instance->tail = tail;
+
+    land_rover_v0_parse_key_fields(
+        key,
+        &instance->command_signature,
+        &instance->serial,
+        &instance->count,
+        &instance->button,
+        &instance->check);
+
+    instance->generic.data           = instance->key;
+    instance->generic.data_count_bit =
+        subghz_protocol_land_rover_v0_const.min_count_bit_for_found;
+    instance->generic.serial = instance->serial;
+    instance->generic.btn    = instance->button;
+    instance->generic.cnt    = instance->count;
+
+    return true;
+}
+
+static bool land_rover_v0_process_transition(
+    SubGhzProtocolDecoderLandRoverV0* instance,
+    bool                              level,
+    uint32_t                          duration) {
+
+    if(!instance->boundary_pad_skipped) {
+        if(level && lr_is_short(duration)) {
+            instance->boundary_pad_skipped = true;
+            return true;
+        }
+        instance->boundary_pad_skipped = true;
+    }
+
+    if(instance->pending_short) {
+        if(!instance->previous_bit && !level && lr_is_short(duration)) {
+            instance->pending_short = false;
+            return land_rover_v0_add_decoded_bit(instance, false);
+        } else if(instance->previous_bit && level && lr_is_short(duration)) {
+            instance->pending_short = false;
+            return land_rover_v0_add_decoded_bit(instance, true);
+        }
+        return false;
+    }
+
+    if(!instance->previous_bit) {
+        if(level && lr_is_long(duration)) {
+            instance->previous_bit = true;
+            return land_rover_v0_add_decoded_bit(instance, true);
+        } else if(level && lr_is_short(duration)) {
+            instance->pending_short = true;
+            return true;
+        }
+        return false;
+    }
+
+    if(!level && lr_is_long(duration)) {
+        instance->previous_bit = false;
+        return land_rover_v0_add_decoded_bit(instance, false);
+    } else if(!level && lr_is_short(duration)) {
+        instance->pending_short = true;
+        return true;
+    }
+
+    return false;
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Encoder waveform helpers
+ * ═════════════════════════════════════════════════════════════════════════*/
+
+static bool land_rover_v0_encoder_add_level(
+    SubGhzProtocolEncoderLandRoverV0* instance,
+    size_t*                           index,
+    bool                              level,
+    uint32_t                          duration) {
+
+    if(*index >= LAND_ROVER_V0_UPLOAD_CAPACITY) return false;
+    instance->encoder.upload[(*index)++] = level_duration_make(level, duration);
+    return true;
+}
+
+static bool land_rover_v0_encoder_add_bit(
+    SubGhzProtocolEncoderLandRoverV0* instance,
+    size_t*                           index,
+    bool*                             previous_bit,
+    bool                              bit) {
+
+    const uint32_t te_short = subghz_protocol_land_rover_v0_const.te_short;
+    const uint32_t te_long  = subghz_protocol_land_rover_v0_const.te_long;
+
+    if(!*previous_bit && !bit) {
+        /* 0→0: two short pulses low-high */
+        if(!land_rover_v0_encoder_add_level(instance, index, true,  te_short) ||
+           !land_rover_v0_encoder_add_level(instance, index, false, te_short))
+            return false;
+    } else if(!*previous_bit && bit) {
+        /* 0→1: one long high */
+        if(!land_rover_v0_encoder_add_level(instance, index, true, te_long))
+            return false;
+    } else if(*previous_bit && !bit) {
+        /* 1→0: one long low */
+        if(!land_rover_v0_encoder_add_level(instance, index, false, te_long))
+            return false;
+    } else {
+        /* 1→1: two short pulses high-low */
+        if(!land_rover_v0_encoder_add_level(instance, index, false, te_short) ||
+           !land_rover_v0_encoder_add_level(instance, index, true,  te_short))
+            return false;
+    }
+
+    *previous_bit = bit;
+    return true;
+}
+
+static bool land_rover_v0_build_upload(SubGhzProtocolEncoderLandRoverV0* instance) {
+    furi_check(instance);
+
+    size_t         index    = 0;
+    const uint32_t te_short = subghz_protocol_land_rover_v0_const.te_short;
+
+    uint8_t key_bytes[8];
+    lr_u64_to_bytes_be(instance->key, key_bytes);
+
+    /* Preamble: alternating short high/low pairs */
+    for(uint16_t i = 0; i < LAND_ROVER_V0_PREAMBLE_PAIRS; i++) {
+        if(!land_rover_v0_encoder_add_level(instance, &index, true,  te_short) ||
+           !land_rover_v0_encoder_add_level(instance, &index, false, te_short))
+            return false;
+    }
+
+    /* Sync: long high, long low, short high (boundary pulse) */
+    if(!land_rover_v0_encoder_add_level(instance, &index, true,  LAND_ROVER_V0_SYNC_US) ||
+       !land_rover_v0_encoder_add_level(instance, &index, false, LAND_ROVER_V0_SYNC_US) ||
+       !land_rover_v0_encoder_add_level(instance, &index, true,  te_short))
+        return false;
+
+    /* First encoded bit: always 0, previous state is 1 (the boundary pulse) */
+    bool previous_bit = true;
+    if(!land_rover_v0_encoder_add_bit(instance, &index, &previous_bit, false))
+        return false;
+
+    /* Data bits 2..63 from the 64-bit key */
+    for(uint8_t bit_index = 2; bit_index < 64; bit_index++) {
+        const uint8_t byte_index  = bit_index / 8U;
+        const uint8_t bit_in_byte = 7U - (bit_index % 8U);
+        const bool    bit         = (key_bytes[byte_index] >> bit_in_byte) & 1U;
+        if(!land_rover_v0_encoder_add_bit(instance, &index, &previous_bit, bit))
+            return false;
+    }
+
+    /* 16-bit tail */
+    instance->tail = land_rover_v0_calculate_tail(instance->count);
+    for(uint8_t bit_index = 0; bit_index < 16; bit_index++) {
+        const bool bit = (instance->tail >> (15U - bit_index)) & 1U;
+        if(!land_rover_v0_encoder_add_bit(instance, &index, &previous_bit, bit))
+            return false;
+    }
+
+    /* Extra bit (always 1) */
+    if(!land_rover_v0_encoder_add_bit(instance, &index, &previous_bit, true))
+        return false;
+
+    /* Inter-frame gap */
+    if(!land_rover_v0_encoder_add_level(instance, &index, false, LAND_ROVER_V0_GAP_US))
+        return false;
+
+    instance->encoder.front       = 0;
+    instance->encoder.size_upload = index;
+    return true;
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Decoder – public API
+ * ═════════════════════════════════════════════════════════════════════════*/
+
+void* subghz_protocol_decoder_land_rover_v0_alloc(SubGhzEnvironment* environment) {
+    UNUSED(environment);
+    SubGhzProtocolDecoderLandRoverV0* instance =
+        calloc(1, sizeof(SubGhzProtocolDecoderLandRoverV0));
+    furi_check(instance);
+    instance->base.protocol         = &subghz_protocol_land_rover_v0;
+    instance->generic.protocol_name = instance->base.protocol->name;
+    return instance;
+}
+
+void subghz_protocol_decoder_land_rover_v0_free(void* context) {
+    furi_check(context);
+    free(context);
+}
+
+void subghz_protocol_decoder_land_rover_v0_reset(void* context) {
+    furi_check(context);
+    SubGhzProtocolDecoderLandRoverV0* instance = context;
+
+    instance->decoder.parser_step     = LandRoverV0DecoderStepReset;
+    instance->decoder.te_last         = 0;
+    instance->preamble_count          = 0;
+    memset(instance->raw, 0, sizeof(instance->raw));
+    instance->bit_count               = 0;
+    instance->extra_bit               = false;
+    instance->previous_bit            = true;
+    instance->boundary_pad_skipped    = false;
+    instance->pending_short           = false;
+}
+
+void subghz_protocol_decoder_land_rover_v0_feed(
+    void*    context,
+    bool     level,
+    uint32_t duration) {
+
+    furi_check(context);
+    SubGhzProtocolDecoderLandRoverV0* instance = context;
+
+    switch(instance->decoder.parser_step) {
+    case LandRoverV0DecoderStepReset:
+        if(level && lr_is_short(duration)) {
+            instance->preamble_count      = 0;
+            instance->decoder.parser_step = LandRoverV0DecoderStepPreambleLow;
+        }
+        break;
+
+    case LandRoverV0DecoderStepPreambleLow:
+        if(!level && lr_is_short(duration)) {
+            instance->preamble_count++;
+            instance->decoder.parser_step = LandRoverV0DecoderStepPreambleHigh;
+        } else {
+            instance->decoder.parser_step = LandRoverV0DecoderStepReset;
+        }
+        break;
+
+    case LandRoverV0DecoderStepPreambleHigh:
+        if(level && lr_is_short(duration)) {
+            instance->decoder.parser_step = LandRoverV0DecoderStepPreambleLow;
+        } else if(level && land_rover_v0_is_sync(duration) &&
+                  instance->preamble_count >= LAND_ROVER_V0_MIN_PREAMBLE_PAIRS) {
+            instance->decoder.parser_step = LandRoverV0DecoderStepSyncLow;
+        } else {
+            instance->decoder.parser_step = LandRoverV0DecoderStepReset;
+        }
+        break;
+
+    case LandRoverV0DecoderStepSyncLow:
+        if(!level && land_rover_v0_is_sync(duration)) {
+            memset(instance->raw, 0, sizeof(instance->raw));
+            instance->bit_count            = 0;
+            instance->extra_bit            = false;
+            instance->previous_bit         = true;
+            instance->boundary_pad_skipped = false;
+            instance->pending_short        = false;
+            land_rover_v0_add_decoded_bit(instance, true);
+            instance->decoder.parser_step  = LandRoverV0DecoderStepData;
+        } else {
+            instance->decoder.parser_step = LandRoverV0DecoderStepReset;
+        }
+        break;
+
+    case LandRoverV0DecoderStepData:
+        if(!land_rover_v0_process_transition(instance, level, duration)) {
+            instance->decoder.parser_step = LandRoverV0DecoderStepReset;
+            break;
+        }
+        if(instance->bit_count ==
+           subghz_protocol_land_rover_v0_const.min_count_bit_for_found) {
+            if(land_rover_v0_finish_frame(instance) && instance->base.callback) {
+                instance->base.callback(&instance->base, instance->base.context);
+            }
+            instance->decoder.parser_step = LandRoverV0DecoderStepReset;
+        }
+        break;
+    }
+
+    instance->decoder.te_last = duration;
+}
+
+uint8_t subghz_protocol_decoder_land_rover_v0_get_hash_data(void* context) {
+    furi_check(context);
+    SubGhzProtocolDecoderLandRoverV0* instance = context;
+
+    SubGhzBlockDecoder decoder = {
+        .decode_data      = instance->key,
+        .decode_count_bit = 64,
+    };
+    uint8_t hash = subghz_protocol_blocks_get_hash_data(&decoder, 9);
+    hash ^= (uint8_t)(instance->tail >> 8);
+    hash ^= (uint8_t)instance->tail;
+    hash ^= instance->extra_bit ? 1U : 0U;
+    return hash;
+}
+
+SubGhzProtocolStatus subghz_protocol_decoder_land_rover_v0_serialize(
+    void*              context,
+    FlipperFormat*     flipper_format,
+    SubGhzRadioPreset* preset) {
+
+    furi_check(context);
+    SubGhzProtocolDecoderLandRoverV0* instance = context;
+
+    SubGhzProtocolStatus ret =
+        subghz_block_generic_serialize(&instance->generic, flipper_format, preset);
+
+    if(ret == SubGhzProtocolStatusOk) {
+        uint8_t key_bytes[8];
+        lr_u64_to_bytes_be(instance->key, key_bytes);
+
+        flipper_format_rewind(flipper_format);
+        flipper_format_insert_or_update_hex(
+            flipper_format, LR_FF_KEY, key_bytes, sizeof(key_bytes));
+        lr_ff_write_u32(flipper_format, LR_FF_SERIAL,             instance->serial);
+        lr_ff_write_u32(flipper_format, LR_FF_BTN,                instance->button);
+        lr_ff_write_u32(flipper_format, LAND_ROVER_V0_FF_BTNSIG,  instance->command_signature);
+        lr_ff_write_u32(flipper_format, LR_FF_CNT,                instance->count);
+        lr_ff_write_u32(flipper_format, LAND_ROVER_V0_FF_CHECK,   instance->check);
+        lr_ff_write_u32(flipper_format, LAND_ROVER_V0_FF_TAIL,    instance->tail);
+        lr_ff_write_u32(flipper_format, LAND_ROVER_V0_FF_EXTRA_BIT,
+                        instance->extra_bit ? 1U : 0U);
+    }
+
+    return ret;
+}
+
+SubGhzProtocolStatus subghz_protocol_decoder_land_rover_v0_deserialize(
+    void*          context,
+    FlipperFormat* flipper_format) {
+
+    furi_check(context);
+    SubGhzProtocolDecoderLandRoverV0* instance = context;
+
+    SubGhzProtocolStatus ret = subghz_block_generic_deserialize_check_count_bit(
+        &instance->generic,
+        flipper_format,
+        subghz_protocol_land_rover_v0_const.min_count_bit_for_found);
+
+    if(ret == SubGhzProtocolStatusOk) {
+        uint8_t key_bytes[8] = {0};
+        bool    have_key     = false;
+
+        flipper_format_rewind(flipper_format);
+        if(flipper_format_read_hex(
+               flipper_format, LR_FF_KEY, key_bytes, sizeof(key_bytes))) {
+            instance->key = lr_bytes_to_u64_be(key_bytes);
+            have_key      = true;
+        }
+
+        if(!have_key) {
+            instance->key = instance->generic.data;
+            lr_u64_to_bytes_be(instance->key, key_bytes);
+        }
+
+        uint32_t temp = 0;
+
+        flipper_format_rewind(flipper_format);
+        if(lr_ff_read_u32(flipper_format, LAND_ROVER_V0_FF_TAIL, &temp)) {
+            instance->tail = (uint16_t)(temp & 0xFFFFU);
+        } else {
+            const uint32_t count =
+                ((uint32_t)key_bytes[6] << 1) | ((key_bytes[7] >> 7) & 1U);
+            instance->tail = land_rover_v0_calculate_tail(count);
+        }
+
+        flipper_format_rewind(flipper_format);
+        if(lr_ff_read_u32(flipper_format, LAND_ROVER_V0_FF_EXTRA_BIT, &temp)) {
+            instance->extra_bit = (temp & 1U) != 0;
+        } else {
+            instance->extra_bit = true;
+        }
+
+        land_rover_v0_validate_frame(
+            instance->key, instance->tail, instance->extra_bit,
+            &instance->check_ok, &instance->tail_ok);
+
+        land_rover_v0_parse_key_fields(
+            instance->key,
+            &instance->command_signature,
+            &instance->serial,
+            &instance->count,
+            &instance->button,
+            &instance->check);
+
+        instance->generic.data           = instance->key;
+        instance->generic.data_count_bit =
+            subghz_protocol_land_rover_v0_const.min_count_bit_for_found;
+        instance->generic.serial = instance->serial;
+        instance->generic.btn    = instance->button;
+        instance->generic.cnt    = instance->count;
+    }
+
+    return ret;
+}
+
+void subghz_protocol_decoder_land_rover_v0_get_string(void* context, FuriString* output) {
+    furi_check(context);
+    SubGhzProtocolDecoderLandRoverV0* instance = context;
+
+    furi_string_cat_printf(
+        output,
+        "%s %dbit\r\n"
+        "Key:%016llX\r\n"
+        "Sn:%06lX  Btn:%02X - %s\r\n"
+        "BtnSig:%06lX\r\n"
+        "Cnt:%05lX  Chk:%02X [%s]  Tail:%05lX [%s]\r\n",
+        instance->generic.protocol_name,
+        instance->generic.data_count_bit,
+        (unsigned long long)instance->key,
+        (unsigned long)instance->serial,
+        instance->button,
+        land_rover_v0_button_name(instance->button),
+        (unsigned long)instance->command_signature,
+        (unsigned long)instance->count,
+        instance->check,
+        instance->check_ok ? "OK" : "BAD",
+        (unsigned long)(((instance->tail >> 15) & 1U) ? 0x1FFFFUL : 0x0FFFFUL),
+        instance->tail_ok ? "OK" : "BAD");
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Encoder – helpers
+ * ═════════════════════════════════════════════════════════════════════════*/
+
+static uint32_t land_rover_v0_signature_from_button(uint8_t button) {
+    switch(button) {
+    case LAND_ROVER_V0_BTN_LOCK:   return LAND_ROVER_V0_SIG_LOCK;
+    case LAND_ROVER_V0_BTN_UNLOCK: return LAND_ROVER_V0_SIG_UNLOCK;
+    default:                        return 0;
+    }
+}
+
+static uint64_t land_rover_v0_build_key(
+    uint32_t signature,
+    uint32_t serial,
+    uint32_t count) {
+
+    uint8_t key_bytes[8] = {0};
+    key_bytes[0] = (uint8_t)((signature >> 16) & 0xFFU);
+    key_bytes[1] = (uint8_t)((signature >>  8) & 0xFFU);
+    key_bytes[2] = (uint8_t)( signature        & 0xFFU);
+    key_bytes[3] = (uint8_t)((serial    >> 16) & 0xFFU);
+    key_bytes[4] = (uint8_t)((serial    >>  8) & 0xFFU);
+    key_bytes[5] = (uint8_t)( serial           & 0xFFU);
+    key_bytes[6] = (uint8_t)((count     >>  1) & 0xFFU);
+
+    const bool    counter_lsb = (count & 1U) != 0;
+    const uint8_t check       = land_rover_v0_calculate_check(count);
+    key_bytes[7]              = (counter_lsb ? 0x80U : 0x00U) | check;
+
+    return lr_bytes_to_u64_be(key_bytes);
+}
+
+/* ═══════════════════════════════════════════════════════════════════════════
+ * Encoder – public API
+ * ═════════════════════════════════════════════════════════════════════════*/
+
+void* subghz_protocol_encoder_land_rover_v0_alloc(SubGhzEnvironment* environment) {
+    UNUSED(environment);
+    SubGhzProtocolEncoderLandRoverV0* instance =
+        calloc(1, sizeof(SubGhzProtocolEncoderLandRoverV0));
+    furi_check(instance);
+
+    instance->base.protocol         = &subghz_protocol_land_rover_v0;
+    instance->generic.protocol_name = instance->base.protocol->name;
+
+    /* Allocate the waveform upload buffer */
+    instance->encoder.upload =
+        malloc(LAND_ROVER_V0_UPLOAD_CAPACITY * sizeof(LevelDuration));
+    furi_check(instance->encoder.upload);
+
+    instance->encoder.repeat      = 10;
+    instance->encoder.size_upload = 0;
+    instance->encoder.front       = 0;
+    instance->encoder.is_running  = false;
+
+    return instance;
+}
+
+void subghz_protocol_encoder_land_rover_v0_free(void* context) {
+    furi_check(context);
+    SubGhzProtocolEncoderLandRoverV0* instance = context;
+    free(instance->encoder.upload);
+    free(instance);
+}
+
+SubGhzProtocolStatus subghz_protocol_encoder_land_rover_v0_deserialize(
+    void*          context,
+    FlipperFormat* flipper_format) {
+
+    furi_check(context);
+    SubGhzProtocolEncoderLandRoverV0* instance = context;
+    SubGhzProtocolStatus              ret      = SubGhzProtocolStatusError;
+
+    instance->encoder.is_running = false;
+    instance->encoder.front      = 0;
+    instance->encoder.repeat     = 10;
+
+    do {
+        if(lr_verify_protocol_name(flipper_format, instance->base.protocol->name) !=
+           SubGhzProtocolStatusOk)
+            break;
+
+        SubGhzProtocolStatus load_status =
+            subghz_block_generic_deserialize_check_count_bit(
+                &instance->generic,
+                flipper_format,
+                subghz_protocol_land_rover_v0_const.min_count_bit_for_found);
+        if(load_status != SubGhzProtocolStatusOk) break;
+
+        instance->serial = instance->generic.serial & 0xFFFFFFU;
+        instance->button = instance->generic.btn;
+        instance->count  = instance->generic.cnt    & 0x1FFU;
+
+        uint8_t key_bytes[8] = {0};
+        bool    have_key     = false;
+
+        flipper_format_rewind(flipper_format);
+        if(flipper_format_read_hex(
+               flipper_format, LR_FF_KEY, key_bytes, sizeof(key_bytes))) {
+            instance->key = lr_bytes_to_u64_be(key_bytes);
+            have_key      = true;
+        }
+
+        if(have_key) {
+            land_rover_v0_parse_key_fields(
+                instance->key,
+                &instance->command_signature,
+                &instance->serial,
+                &instance->count,
+                &instance->button,
+                &instance->check);
+        }
+
+        uint32_t u32         = 0;
+        bool     have_button = false;
+
+        flipper_format_rewind(flipper_format);
+        if(lr_ff_read_u32(flipper_format, LR_FF_SERIAL, &u32))
+            instance->serial = u32 & 0xFFFFFFU;
+
+        flipper_format_rewind(flipper_format);
+        if(lr_ff_read_u32(flipper_format, LR_FF_CNT, &u32))
+            instance->count = u32 & 0x1FFU;
+
+        flipper_format_rewind(flipper_format);
+        if(lr_ff_read_u32(flipper_format, LR_FF_BTN, &u32)) {
+            instance->button = (uint8_t)u32;
+            have_button      = true;
+        }
+
+        flipper_format_rewind(flipper_format);
+        if(lr_ff_read_u32(flipper_format, LAND_ROVER_V0_FF_BTNSIG, &u32))
+            instance->command_signature = u32 & 0xFFFFFFU;
+
+        if(have_button) {
+            const uint32_t sig = land_rover_v0_signature_from_button(instance->button);
+            if(sig != 0U) instance->command_signature = sig;
+        }
+
+        if(instance->command_signature == 0U) break;
+
+        instance->key = land_rover_v0_build_key(
+            instance->command_signature, instance->serial, instance->count);
+
+        lr_u64_to_bytes_be(instance->key, key_bytes);
+        instance->tail = land_rover_v0_calculate_tail(instance->count);
+
+        land_rover_v0_parse_key_fields(
+            instance->key,
+            &instance->command_signature,
+            &instance->serial,
+            &instance->count,
+            &instance->button,
+            &instance->check);
+
+        instance->generic.data           = instance->key;
+        instance->generic.data_count_bit =
+            subghz_protocol_land_rover_v0_const.min_count_bit_for_found;
+        instance->generic.serial = instance->serial;
+        instance->generic.btn    = instance->button;
+        instance->generic.cnt    = instance->count;
+
+        flipper_format_rewind(flipper_format);
+        instance->encoder.repeat = lr_encoder_read_repeat(flipper_format, 10);
+
+        if(!land_rover_v0_build_upload(instance) ||
+           instance->encoder.size_upload == 0U)
+            break;
+
+        /* Update the file with all recalculated fields */
+        flipper_format_rewind(flipper_format);
+        flipper_format_insert_or_update_hex(
+            flipper_format, LR_FF_KEY, key_bytes, sizeof(key_bytes));
+        lr_ff_write_u32(flipper_format, LR_FF_SERIAL,             instance->serial);
+        lr_ff_write_u32(flipper_format, LR_FF_BTN,                instance->button);
+        lr_ff_write_u32(flipper_format, LAND_ROVER_V0_FF_BTNSIG,  instance->command_signature);
+        lr_ff_write_u32(flipper_format, LR_FF_CNT,                instance->count);
+        lr_ff_write_u32(flipper_format, LAND_ROVER_V0_FF_CHECK,   instance->check);
+        lr_ff_write_u32(flipper_format, LAND_ROVER_V0_FF_TAIL,    instance->tail);
+        lr_ff_write_u32(flipper_format, LAND_ROVER_V0_FF_EXTRA_BIT, 1U);
+
+        instance->encoder.is_running = true;
+        ret = SubGhzProtocolStatusOk;
+    } while(false);
+
+    return ret;
+}
+
+void subghz_protocol_encoder_land_rover_v0_stop(void* context) {
+    furi_check(context);
+    SubGhzProtocolEncoderLandRoverV0* instance = context;
+    instance->encoder.is_running = false;
+}
+
+LevelDuration subghz_protocol_encoder_land_rover_v0_yield(void* context) {
+    furi_check(context);
+    SubGhzProtocolEncoderLandRoverV0* instance = context;
+
+    if(instance->encoder.front >= instance->encoder.size_upload) {
+        /* One full repetition done; count it down */
+        if(instance->encoder.repeat > 0) {
+            instance->encoder.repeat--;
+        }
+        instance->encoder.front = 0;
+
+        if(instance->encoder.repeat == 0) {
+            instance->encoder.is_running = false;
+            return level_duration_reset();
+        }
+    }
+
+    return instance->encoder.upload[instance->encoder.front++];
+}

lib/subghz/protocols/land_rover_v0.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <furi.h>
+#include <lib/subghz/protocols/base.h>
+#include <lib/subghz/types.h>
+#include <lib/subghz/blocks/const.h>
+#include <lib/subghz/blocks/decoder.h>
+#include <lib/subghz/blocks/encoder.h>
+#include <lib/subghz/blocks/generic.h>
+#include <lib/subghz/blocks/math.h>
+#include <flipper_format/flipper_format.h>
+#include <lib/toolbox/level_duration.h>
+
+#define LAND_ROVER_PROTOCOL_V0_NAME "Land Rover V0"
+
+extern const SubGhzProtocol subghz_protocol_land_rover_v0;
+
+void* subghz_protocol_decoder_land_rover_v0_alloc(SubGhzEnvironment* environment);
+void subghz_protocol_decoder_land_rover_v0_free(void* context);
+void subghz_protocol_decoder_land_rover_v0_reset(void* context);
+void subghz_protocol_decoder_land_rover_v0_feed(void* context, bool level, uint32_t duration);
+uint8_t subghz_protocol_decoder_land_rover_v0_get_hash_data(void* context);
+SubGhzProtocolStatus subghz_protocol_decoder_land_rover_v0_serialize(
+    void* context,
+    FlipperFormat* flipper_format,
+    SubGhzRadioPreset* preset);
+SubGhzProtocolStatus
+    subghz_protocol_decoder_land_rover_v0_deserialize(void* context, FlipperFormat* flipper_format);
+void subghz_protocol_decoder_land_rover_v0_get_string(void* context, FuriString* output);
+
+void* subghz_protocol_encoder_land_rover_v0_alloc(SubGhzEnvironment* environment);
+void subghz_protocol_encoder_land_rover_v0_free(void* context);
+SubGhzProtocolStatus
+    subghz_protocol_encoder_land_rover_v0_deserialize(void* context, FlipperFormat* flipper_format);
+void subghz_protocol_encoder_land_rover_v0_stop(void* context);
+LevelDuration subghz_protocol_encoder_land_rover_v0_yield(void* context);

lib/subghz/protocols/protocol_items.c

@@ -84,6 +84,7 @@ const SubGhzProtocol* const subghz_protocol_registry_items[] = {
     &ford_protocol_v1,
     &ford_protocol_v2,
     &ford_protocol_v3,
+    &subghz_protocol_land_rover_v0,
 
 };
 

lib/subghz/protocols/protocol_items.h

@@ -85,3 +85,4 @@
 #include "ford_v1.h"
 #include "ford_v2.h"
 #include "ford_v3.h"
+#include "land_rover_v0.h"