Update Heltec Tracker v2 to version KCT8103L.

src/helpers/sensors/MicroNMEALocationProvider.h

@@ -39,6 +39,7 @@ class MicroNMEALocationProvider : public LocationProvider {
     mesh::RTCClock* _clock;
     Stream* _gps_serial;
     RefCountedDigitalPin* _peripher_power;
+    int8_t _claims = 0;
     int _pin_reset;
     int _pin_en;
     long next_check = 0;
@@ -57,8 +58,21 @@ public :
         }
     }
 
+    void claim() {
+        _claims++;
+        if (_claims > 0) {
+            if (_peripher_power) _peripher_power->claim();
+        }
+    }
+
+    void release() {
+        if (_claims == 0) return; // avoid negative _claims
+        _claims--;
+        if (_peripher_power) _peripher_power->release();
+    }
+
     void begin() override {
-        if (_peripher_power) _peripher_power->claim();
+        claim();
         if (_pin_en != -1) {
             digitalWrite(_pin_en, PIN_GPS_EN_ACTIVE);
         }
@@ -82,7 +96,7 @@ public :
         if (_pin_reset != -1) {
             digitalWrite(_pin_reset, GPS_RESET_FORCE);
         }
-        if (_peripher_power) _peripher_power->release();
+        release();
     }
 
     bool isEnabled() override {

variants/heltec_tracker_v2/HeltecTrackerV2Board.cpp

@@ -6,19 +6,7 @@ void HeltecTrackerV2Board::begin() {
     pinMode(PIN_ADC_CTRL, OUTPUT);
     digitalWrite(PIN_ADC_CTRL, LOW); // Initially inactive
 
-    // Set up digital GPIO registers before releasing RTC hold. The hold latches
-    // the pad state including function select, so register writes accumulate
-    // without affecting the pad. On hold release, all changes apply atomically
-    // (IO MUX switches to digital GPIO with output already HIGH — no glitch).
-    pinMode(P_LORA_PA_POWER, OUTPUT);
-    digitalWrite(P_LORA_PA_POWER,HIGH);
-    rtc_gpio_hold_dis((gpio_num_t)P_LORA_PA_POWER);
-
-    pinMode(P_LORA_PA_EN, OUTPUT);
-    digitalWrite(P_LORA_PA_EN,HIGH);
-    rtc_gpio_hold_dis((gpio_num_t)P_LORA_PA_EN);
-    pinMode(P_LORA_PA_TX_EN, OUTPUT);
-    digitalWrite(P_LORA_PA_TX_EN,LOW);
+    loRaFEMControl.init();
 
     esp_reset_reason_t reason = esp_reset_reason();
     if (reason != ESP_RST_DEEPSLEEP) {
@@ -39,12 +27,12 @@ void HeltecTrackerV2Board::begin() {
 
   void HeltecTrackerV2Board::onBeforeTransmit(void) {
     digitalWrite(P_LORA_TX_LED, HIGH);   // turn TX LED on
-    digitalWrite(P_LORA_PA_TX_EN,HIGH);
+    loRaFEMControl.setTxModeEnable();
   }
 
   void HeltecTrackerV2Board::onAfterTransmit(void) {
     digitalWrite(P_LORA_TX_LED, LOW);   // turn TX LED off
-    digitalWrite(P_LORA_PA_TX_EN,LOW);
+    loRaFEMControl.setRxModeEnable();
   }
 
   void HeltecTrackerV2Board::enterDeepSleep(uint32_t secs, int pin_wake_btn) {
@@ -56,9 +44,7 @@ void HeltecTrackerV2Board::begin() {
 
     rtc_gpio_hold_en((gpio_num_t)P_LORA_NSS);
 
-    // Hold GC1109 FEM pins during sleep to keep LNA active for RX wake
-    rtc_gpio_hold_en((gpio_num_t)P_LORA_PA_POWER);
-    rtc_gpio_hold_en((gpio_num_t)P_LORA_PA_EN);
+    loRaFEMControl.setRxModeEnableWhenMCUSleep();//It also needs to be enabled in receive mode
 
     if (pin_wake_btn < 0) {
       esp_sleep_enable_ext1_wakeup( (1L << P_LORA_DIO_1), ESP_EXT1_WAKEUP_ANY_HIGH);  // wake up on: recv LoRa packet

variants/heltec_tracker_v2/HeltecTrackerV2Board.h

@@ -4,11 +4,13 @@
 #include <helpers/RefCountedDigitalPin.h>
 #include <helpers/ESP32Board.h>
 #include <driver/rtc_io.h>
+#include "LoRaFEMControl.h"
 
 class HeltecTrackerV2Board : public ESP32Board {
 
 public:
   RefCountedDigitalPin periph_power;
+  LoRaFEMControl loRaFEMControl;
 
   HeltecTrackerV2Board() : periph_power(PIN_VEXT_EN,PIN_VEXT_EN_ACTIVE) { }
 

variants/heltec_tracker_v2/LoRaFEMControl.cpp

@@ -0,0 +1,58 @@
+#include "LoRaFEMControl.h"
+#include <driver/rtc_io.h>
+#include <esp_sleep.h>
+#include <Arduino.h>
+
+void LoRaFEMControl::init(void)
+{
+    pinMode(P_LORA_PA_POWER, OUTPUT);
+    digitalWrite(P_LORA_PA_POWER, HIGH);
+    rtc_gpio_hold_dis((gpio_num_t)P_LORA_PA_POWER);
+    rtc_gpio_hold_dis((gpio_num_t)P_LORA_KCT8103L_PA_CSD);
+    rtc_gpio_hold_dis((gpio_num_t)P_LORA_KCT8103L_PA_CTX);
+    delay(1);
+    pinMode(P_LORA_KCT8103L_PA_CSD, OUTPUT);
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, HIGH);
+    pinMode(P_LORA_KCT8103L_PA_CTX, OUTPUT);
+    digitalWrite(P_LORA_KCT8103L_PA_CTX, HIGH);
+    setLnaCanControl(true);
+}
+
+void LoRaFEMControl::setSleepModeEnable(void)
+{
+    // shutdown the PA
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, LOW);
+}
+
+void LoRaFEMControl::setTxModeEnable(void)
+{
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, HIGH);
+    digitalWrite(P_LORA_KCT8103L_PA_CTX, HIGH);
+}
+
+void LoRaFEMControl::setRxModeEnable(void)
+{
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, HIGH);
+    if (lna_enabled) {
+        digitalWrite(P_LORA_KCT8103L_PA_CTX, LOW);
+    } else {
+        digitalWrite(P_LORA_KCT8103L_PA_CTX, HIGH);
+    }
+}
+
+void LoRaFEMControl::setRxModeEnableWhenMCUSleep(void)
+{
+    digitalWrite(P_LORA_KCT8103L_PA_CSD, HIGH);
+    rtc_gpio_hold_en((gpio_num_t)P_LORA_KCT8103L_PA_CSD);
+    if (lna_enabled) {
+        digitalWrite(P_LORA_KCT8103L_PA_CTX, LOW);
+    } else {
+        digitalWrite(P_LORA_KCT8103L_PA_CTX, HIGH);
+    }
+    rtc_gpio_hold_en((gpio_num_t)P_LORA_KCT8103L_PA_CTX);
+}
+
+void LoRaFEMControl::setLNAEnable(bool enabled)
+{
+    lna_enabled = enabled;
+}

variants/heltec_tracker_v2/LoRaFEMControl.h

@@ -0,0 +1,21 @@
+#pragma once
+#include <stdint.h>
+
+class LoRaFEMControl
+{
+  public:
+    LoRaFEMControl() {}
+    virtual ~LoRaFEMControl() {}
+    void init(void);
+    void setSleepModeEnable(void);
+    void setTxModeEnable(void);
+    void setRxModeEnable(void);
+    void setRxModeEnableWhenMCUSleep(void);
+    void setLNAEnable(bool enabled);
+    bool isLnaCanControl(void) { return lna_can_control; }
+    void setLnaCanControl(bool can_control) { lna_can_control = can_control; }
+
+  private:
+    bool lna_enabled = false;
+    bool lna_can_control = false;
+};

variants/heltec_tracker_v2/platformio.ini

@@ -17,18 +17,18 @@ build_flags =
   -D P_LORA_SCLK=9
   -D P_LORA_MISO=11
   -D P_LORA_MOSI=10
-  -D P_LORA_PA_POWER=7   ; VFEM_Ctrl - GC1109 LDO power enable
-  -D P_LORA_PA_EN=4      ; CSD - GC1109 chip enable (HIGH=on)
-  -D P_LORA_PA_TX_EN=46  ; CPS - GC1109 PA mode (HIGH=full PA, LOW=bypass)
-  -D LORA_TX_POWER=10    ; 10dBm + ~11dB GC1109 gain = ~21dBm output
+  -D P_LORA_PA_POWER=7  ;VFEM_Ctrl -LDO power enable
+  -D P_LORA_KCT8103L_PA_CSD=4
+  -D P_LORA_KCT8103L_PA_CTX=5
+  -D LORA_TX_POWER=9    ; 9dBm + ~14dB KCT8103L gain = ~22dBm output
   -D MAX_LORA_TX_POWER=22 ; Max SX1262 output -> ~28dBm at antenna
   -D SX126X_DIO2_AS_RF_SWITCH=true
   -D SX126X_DIO3_TCXO_VOLTAGE=1.8
   -D SX126X_CURRENT_LIMIT=140
   -D SX126X_RX_BOOSTED_GAIN=1
   -D SX126X_REGISTER_PATCH=1
-  -D PIN_BOARD_SDA=5
-  -D PIN_BOARD_SCL=6
+  -D PIN_BOARD_SDA=6
+  -D PIN_BOARD_SCL=17
   -D PIN_USER_BTN=0
   -D PIN_TFT_SDA=42   ; SDIN
   -D PIN_TFT_SCL=41   ; SCLK
@@ -207,8 +207,6 @@ build_flags =
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
   -D ADMIN_PASSWORD='"password"'
-  -D ENV_PIN_SDA=3
-  -D ENV_PIN_SCL=4
   -D DISPLAY_CLASS=ST7735Display
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1