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Revert "rak ADC tuning"

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This reverts commit 5369e5d3d8.
This commit is contained in:
liquidraver
2026-04-16 09:35:09 +02:00
parent be38b8889f
commit 897878307d
3 changed files with 501 additions and 500 deletions
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zephcore/boards/nrf52840/rak3401_1watt/rak3401_1watt.dts
+219 -218
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@@ -1,218 +1,219 @@
/*
* RAK3401 1W — nRF52840 + SX1262 + SKY66122 1W PA (WisMesh Booster)
* Copyright (c) 2025 ZephCore
*
* SPDX-License-Identifier: Apache-2.0
*
* Hardware:
* - nRF52840 SoC with BLE 5
* - SX1262 LoRa radio on RAK13302 IO-slot module (30 dBm, SKY66122 FEM)
* DIO2 as RF switch, TCXO 1.8V via DIO3
* - RAK1910 GPS module (optional) on UART0 at 9600 baud
* - Battery ADC on AIN3 (P0.05)
* - I2C0 for WisBlock sensors (auto-detected)
* - LEDs: GREEN=P1.03 (TX, active HIGH), BLUE=P1.04 (status, active HIGH)
* - QSPI flash disabled (pins conflict with LoRa SPI bus)
* - SoftDevice s140 v6.1.1, UF2 bootloader
*
* Pin mappings (from Meshtastic/MeshCore variant.h):
* - LoRa SPI: SCK=P0.03, MOSI=P0.30, MISO=P0.29, CS=P0.26
* - LoRa ctl: DIO1=P0.10 (NFC2), BUSY=P0.09 (NFC1), RESET=P0.04
* - FEM: SX126X_POWER_EN=P0.21 (SKY66122 CSD+CPS)
* - 3V3_S: WB_IO2=P1.02 (3V3_S rail, powers GPS + PA boost)
* - I2C: SDA=P0.13, SCL=P0.14
* - GPS: TX=P0.16, RX=P0.15
* - Battery: AIN3=P0.05
*/
/dts-v1/;
#include <nordic/nrf52840_qiaa.dtsi>
#include "rak3401_1watt-pinctrl.dtsi"
#include <zephyr/dt-bindings/lora/sx126x.h>
#include <zephyr/dt-bindings/adc/nrf-saadc.h>
/ {
model = "RAK3401 1W";
compatible = "rak,rak3401-1watt";
chosen {
zephyr,sram = &sram0;
zephyr,flash = &flash0;
zephyr,code-partition = &code_partition;
zephyr,console = &cdc_acm_uart;
zephyr,shell-uart = &cdc_acm_uart;
};
aliases {
lora0 = &lora;
led0 = &led_green;
led1 = &led_blue;
lora-tx-led = &led_green;
watchdog0 = &wdt0;
};
/* ---- LEDs (active HIGH per variant.h LED_STATE_ON=HIGH) ---- */
leds {
compatible = "gpio-leds";
led_green: led_0 {
gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
label = "Green LED";
};
led_blue: led_1 {
gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
label = "Blue LED";
};
};
/* ---- Power control ---- */
/* 3V3_S rail — must be HIGH for GPS and IO-slot peripherals.
* WB_IO2 (P1.02) doubles as GPS_RESET on the RAK1910 slot,
* so it must remain HIGH when GPS is active. */
v3v3s_enable: v3v3s-enable {
compatible = "regulator-fixed";
regulator-name = "v3v3s-enable";
enable-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
regulator-boot-on;
};
/* SKY66122 FEM enable — must be HIGH before SX1262 can transmit.
* SX126X_POWER_EN = P0.21 (IO3 on WisBlock base). */
lora_pwr_enable: lora-pwr-enable {
compatible = "regulator-fixed";
regulator-name = "lora-pwr-enable";
enable-gpios = <&gpio0 21 GPIO_ACTIVE_HIGH>;
regulator-boot-on;
startup-delay-us = <10000>;
};
/* ---- Battery ADC ---- */
/* P0.05 (AIN3), 150K+150K divider — same circuit as RAK4631.
* mV = raw * mult / 4096; 7200 = 3.6 V FS at pin × 2 (see thinknode_m3.dts). */
zephyr,user {
io-channels = <&adc 3>;
vbat-mv-multiplier = <7200>;
};
};
/* ---- SoC configuration ---- */
&reg0 {
status = "okay";
};
&reg1 {
regulator-initial-mode = <NRF5X_REG_MODE_DCDC>;
};
&adc {
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
/* Battery voltage on P0.05 (AIN3) */
channel@3 {
reg = <3>;
zephyr,gain = "ADC_GAIN_1_6";
zephyr,reference = "ADC_REF_INTERNAL";
zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_MICROSECONDS, 10)>;
zephyr,input-positive = <NRF_SAADC_AIN3>;
zephyr,resolution = <12>;
};
};
/* Enable NFC1 (P0.09) and NFC2 (P0.10) as plain GPIOs.
* P0.09 → SX1262 BUSY, P0.10 → SX1262 DIO1. */
&uicr {
nfct-pins-as-gpios;
};
&gpiote {
status = "okay";
};
&gpio0 {
status = "okay";
};
&gpio1 {
status = "okay";
};
/* ---- GPS on UART0 (RAK1910 u-blox MAX-7Q, 9600 baud) ---- */
&uart0 {
compatible = "nordic,nrf-uarte";
status = "okay";
current-speed = <9600>;
pinctrl-0 = <&uart0_default>;
pinctrl-1 = <&uart0_sleep>;
pinctrl-names = "default", "sleep";
gnss: gnss-nmea-generic {
compatible = "gnss-nmea-generic";
};
};
/* ---- I2C0 for WisBlock sensors ---- */
&i2c0 {
compatible = "nordic,nrf-twim";
status = "okay";
clock-frequency = <I2C_BITRATE_FAST>;
pinctrl-0 = <&i2c0_default>;
pinctrl-1 = <&i2c0_sleep>;
pinctrl-names = "default", "sleep";
/* All supported environment & power sensors — auto-detected at runtime */
#include "../../common/sensors-i2c.dtsi"
};
/* ---- SPI1 for LoRa SX1262 (RAK13302 IO-slot module) ---- */
&spi1 {
compatible = "nordic,nrf-spim";
status = "okay";
pinctrl-0 = <&spi1_default>;
pinctrl-1 = <&spi1_sleep>;
pinctrl-names = "default", "sleep";
cs-gpios = <&gpio0 26 GPIO_ACTIVE_LOW>; /* P0.26 LORA_CS */
lora: lora@0 {
compatible = "semtech,sx1262";
reg = <0>;
spi-max-frequency = <8000000>;
/* LoRa control pins */
reset-gpios = <&gpio0 4 GPIO_ACTIVE_LOW>; /* P0.04 WB_IO4 */
busy-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>; /* P0.09 NFC1 */
dio1-gpios = <&gpio0 10 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>; /* P0.10 NFC2 */
/* DIO2 drives SKY66122 CTX (TX/RX switch) */
dio2-tx-enable;
/* TCXO 1.8V reference via DIO3 */
dio3-tcxo-voltage = <SX126X_DIO3_TCXO_1V8>;
tcxo-power-startup-delay-ms = <5>;
/* RX boosted LNA for improved sensitivity */
rx-boosted;
};
};
/* ---- QSPI flash — disabled (pins shared with LoRa SPI) ---- */
&qspi {
status = "disabled";
};
/* ---- USB CDC for console/CLI ---- */
zephyr_udc0: &usbd {
compatible = "nordic,nrf-usbd";
status = "okay";
cdc_acm_uart: cdc_acm_uart {
compatible = "zephyr,cdc-acm-uart";
};
};
/* ---- Flash partitions (SoftDevice v6, app@0x26000) ---- */
#include "../../common/nrf52_partitions_sdv6.dtsi"
/*
* RAK3401 1W — nRF52840 + SX1262 + SKY66122 1W PA (WisMesh Booster)
* Copyright (c) 2025 ZephCore
*
* SPDX-License-Identifier: Apache-2.0
*
* Hardware:
* - nRF52840 SoC with BLE 5
* - SX1262 LoRa radio on RAK13302 IO-slot module (30 dBm, SKY66122 FEM)
* DIO2 as RF switch, TCXO 1.8V via DIO3
* - RAK1910 GPS module (optional) on UART0 at 9600 baud
* - Battery ADC on AIN3 (P0.05)
* - I2C0 for WisBlock sensors (auto-detected)
* - LEDs: GREEN=P1.03 (TX, active HIGH), BLUE=P1.04 (status, active HIGH)
* - QSPI flash disabled (pins conflict with LoRa SPI bus)
* - SoftDevice s140 v6.1.1, UF2 bootloader
*
* Pin mappings (from Meshtastic/MeshCore variant.h):
* - LoRa SPI: SCK=P0.03, MOSI=P0.30, MISO=P0.29, CS=P0.26
* - LoRa ctl: DIO1=P0.10 (NFC2), BUSY=P0.09 (NFC1), RESET=P0.04
* - FEM: SX126X_POWER_EN=P0.21 (SKY66122 CSD+CPS)
* - 3V3_S: WB_IO2=P1.02 (3V3_S rail, powers GPS + PA boost)
* - I2C: SDA=P0.13, SCL=P0.14
* - GPS: TX=P0.16, RX=P0.15
* - Battery: AIN3=P0.05
*/
/dts-v1/;
#include <nordic/nrf52840_qiaa.dtsi>
#include "rak3401_1watt-pinctrl.dtsi"
#include <zephyr/dt-bindings/lora/sx126x.h>
#include <zephyr/dt-bindings/adc/nrf-saadc.h>
/ {
model = "RAK3401 1W";
compatible = "rak,rak3401-1watt";
chosen {
zephyr,sram = &sram0;
zephyr,flash = &flash0;
zephyr,code-partition = &code_partition;
zephyr,console = &cdc_acm_uart;
zephyr,shell-uart = &cdc_acm_uart;
};
aliases {
lora0 = &lora;
led0 = &led_green;
led1 = &led_blue;
lora-tx-led = &led_green;
watchdog0 = &wdt0;
};
/* ---- LEDs (active HIGH per variant.h LED_STATE_ON=HIGH) ---- */
leds {
compatible = "gpio-leds";
led_green: led_0 {
gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
label = "Green LED";
};
led_blue: led_1 {
gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
label = "Blue LED";
};
};
/* ---- Power control ---- */
/* 3V3_S rail — must be HIGH for GPS and IO-slot peripherals.
* WB_IO2 (P1.02) doubles as GPS_RESET on the RAK1910 slot,
* so it must remain HIGH when GPS is active. */
v3v3s_enable: v3v3s-enable {
compatible = "regulator-fixed";
regulator-name = "v3v3s-enable";
enable-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
regulator-boot-on;
};
/* SKY66122 FEM enable — must be HIGH before SX1262 can transmit.
* SX126X_POWER_EN = P0.21 (IO3 on WisBlock base). */
lora_pwr_enable: lora-pwr-enable {
compatible = "regulator-fixed";
regulator-name = "lora-pwr-enable";
enable-gpios = <&gpio0 21 GPIO_ACTIVE_HIGH>;
regulator-boot-on;
startup-delay-us = <10000>;
};
/* ---- Battery ADC ---- */
/* P0.05 (AIN3), 150K+150K divider — same circuit as RAK4631.
* Arduino ADC_MULTIPLIER=1.73, AREF=3.0V:
* vbat-mv-multiplier = round(3 * 1.73 * 1.187 * 1000) = 6161 */
zephyr,user {
io-channels = <&adc 3>;
vbat-mv-multiplier = <6161>;
};
};
/* ---- SoC configuration ---- */
&reg0 {
status = "okay";
};
&reg1 {
regulator-initial-mode = <NRF5X_REG_MODE_DCDC>;
};
&adc {
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
/* Battery voltage on P0.05 (AIN3) */
channel@3 {
reg = <3>;
zephyr,gain = "ADC_GAIN_1_6";
zephyr,reference = "ADC_REF_INTERNAL";
zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_MICROSECONDS, 10)>;
zephyr,input-positive = <NRF_SAADC_AIN3>;
zephyr,resolution = <12>;
};
};
/* Enable NFC1 (P0.09) and NFC2 (P0.10) as plain GPIOs.
* P0.09 → SX1262 BUSY, P0.10 → SX1262 DIO1. */
&uicr {
nfct-pins-as-gpios;
};
&gpiote {
status = "okay";
};
&gpio0 {
status = "okay";
};
&gpio1 {
status = "okay";
};
/* ---- GPS on UART0 (RAK1910 u-blox MAX-7Q, 9600 baud) ---- */
&uart0 {
compatible = "nordic,nrf-uarte";
status = "okay";
current-speed = <9600>;
pinctrl-0 = <&uart0_default>;
pinctrl-1 = <&uart0_sleep>;
pinctrl-names = "default", "sleep";
gnss: gnss-nmea-generic {
compatible = "gnss-nmea-generic";
};
};
/* ---- I2C0 for WisBlock sensors ---- */
&i2c0 {
compatible = "nordic,nrf-twim";
status = "okay";
clock-frequency = <I2C_BITRATE_FAST>;
pinctrl-0 = <&i2c0_default>;
pinctrl-1 = <&i2c0_sleep>;
pinctrl-names = "default", "sleep";
/* All supported environment & power sensors — auto-detected at runtime */
#include "../../common/sensors-i2c.dtsi"
};
/* ---- SPI1 for LoRa SX1262 (RAK13302 IO-slot module) ---- */
&spi1 {
compatible = "nordic,nrf-spim";
status = "okay";
pinctrl-0 = <&spi1_default>;
pinctrl-1 = <&spi1_sleep>;
pinctrl-names = "default", "sleep";
cs-gpios = <&gpio0 26 GPIO_ACTIVE_LOW>; /* P0.26 LORA_CS */
lora: lora@0 {
compatible = "semtech,sx1262";
reg = <0>;
spi-max-frequency = <8000000>;
/* LoRa control pins */
reset-gpios = <&gpio0 4 GPIO_ACTIVE_LOW>; /* P0.04 WB_IO4 */
busy-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>; /* P0.09 NFC1 */
dio1-gpios = <&gpio0 10 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>; /* P0.10 NFC2 */
/* DIO2 drives SKY66122 CTX (TX/RX switch) */
dio2-tx-enable;
/* TCXO 1.8V reference via DIO3 */
dio3-tcxo-voltage = <SX126X_DIO3_TCXO_1V8>;
tcxo-power-startup-delay-ms = <5>;
/* RX boosted LNA for improved sensitivity */
rx-boosted;
};
};
/* ---- QSPI flash — disabled (pins shared with LoRa SPI) ---- */
&qspi {
status = "disabled";
};
/* ---- USB CDC for console/CLI ---- */
zephyr_udc0: &usbd {
compatible = "nordic,nrf-usbd";
status = "okay";
cdc_acm_uart: cdc_acm_uart {
compatible = "zephyr,cdc-acm-uart";
};
};
/* ---- Flash partitions (SoftDevice v6, app@0x26000) ---- */
#include "../../common/nrf52_partitions_sdv6.dtsi"
zephcore/boards/nrf52840/rak4631/board.overlay
+1 -2
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@@ -76,8 +76,7 @@
/ {
zephyr,user {
io-channels = <&adc 3>;
/* mV = raw * mult / 4096; 7200 = 3.6 V FS at pin × 2 (2:1 divider), same as thinknode_m3 */
vbat-mv-multiplier = <7200>;
vbat-mv-multiplier = <6161>; /* matches RAK4631 divider + SAADC ref */
};
};
zephcore/boards/nrf52840/rak_wismesh_tag/rak_wismesh_tag.dts
+281 -280
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@@ -1,280 +1,281 @@
/*
* RAK WisMesh Tag — nRF52840 + SX1262 (card-sized GPS tracker)
* Copyright (c) 2025 ZephCore
*
* SPDX-License-Identifier: Apache-2.0
*
* Hardware:
* - nRF52840 SoC with BLE 5
* - SX1262 LoRa radio (DIO2 as RF switch, TCXO 1.8V via DIO3)
* - AT6558R GNSS on UART0 at 9600 baud
* - LIS2DH 3-axis accelerometer on I2C0
* - 1000 mAh battery with ADC on AIN3 (P0.05)
* - Buzzer on PWM0 (P0.21)
* - LEDs: GREEN=P1.03 (TX, active HIGH), BLUE=P1.04 (status, active HIGH)
* - User button on P0.09 (NFC1, active LOW)
* - Board power enable on P0.12
* - No display, no QSPI flash
* - IP66 sealed, pogo-pin USB interface
*
* Pin mappings (from Arduino MeshCore variant.h):
* - LoRa SPI: SCK=P1.11, MOSI=P1.12, MISO=P1.13, CS=P1.10
* - LoRa ctl: DIO1=P1.15, BUSY=P1.14, RESET=P1.06, PWR_EN=P1.05
* - I2C: SDA=P0.25, SCL=P0.24
* - GPS: TX=P0.16, RX=P0.15, EN=P1.02, PPS=P0.17
*/
/dts-v1/;
#include <nordic/nrf52840_qiaa.dtsi>
#include "rak_wismesh_tag-pinctrl.dtsi"
#include <zephyr/dt-bindings/lora/sx126x.h>
#include <zephyr/dt-bindings/adc/nrf-saadc.h>
#include <zephyr/dt-bindings/input/input-event-codes.h>
#include <zephyr/dt-bindings/pwm/pwm.h>
/ {
model = "RAK WisMesh Tag";
compatible = "rak,wismesh-tag";
chosen {
zephyr,sram = &sram0;
zephyr,flash = &flash0;
zephyr,code-partition = &code_partition;
zephyr,console = &cdc_acm_uart;
zephyr,shell-uart = &cdc_acm_uart;
};
aliases {
lora0 = &lora;
led0 = &led_green;
led1 = &led_blue;
lora-tx-led = &led_green;
sw0 = &user_button;
watchdog0 = &wdt0;
buzzer = &buzzer;
gps-enable = &gps_enable_pin;
};
/* ---- LEDs (active HIGH per Arduino LED_STATE_ON=HIGH) ---- */
leds {
compatible = "gpio-leds";
led_green: led_0 {
gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
label = "Green LED";
};
led_blue: led_1 {
gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
label = "Blue LED";
};
};
/* ---- Button (P0.09/NFC1, active LOW with pull-up) ---- */
buttons: buttons {
compatible = "gpio-keys";
user_button: button_0 {
gpios = <&gpio0 9 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
zephyr,code = <INPUT_KEY_0>;
label = "User Button";
};
};
/* Input filter: long-press (1000ms) */
user_btn_longpress {
compatible = "zephyr,input-longpress";
input = <&buttons>;
input-codes = <INPUT_KEY_0>;
short-codes = <INPUT_KEY_A>;
long-codes = <INPUT_KEY_POWER>;
long-delay-ms = <1000>;
};
/* Input filter: multi-tap
* 1 tap → KEY_1 = (reserved / next page if display added)
* 2 taps → KEY_B = flood advert
* 3 taps → KEY_D = buzzer mute toggle
* 4 taps → KEY_C = GPS on/off
* 5 taps → KEY_E = LED heartbeat toggle */
user_btn_multitap {
compatible = "zephcore,input-multi-tap";
input-codes = <INPUT_KEY_A>;
tap-codes = <INPUT_KEY_1 INPUT_KEY_B INPUT_KEY_D INPUT_KEY_C INPUT_KEY_E>;
tap-delay-ms = <400>;
};
/* ---- Power control ---- */
/* Board power enable — must be HIGH for peripherals */
pwr_enable: pwr-enable {
compatible = "regulator-fixed";
regulator-name = "pwr-enable";
enable-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
regulator-boot-on;
};
/* LoRa radio power enable — must be HIGH before SX1262 can communicate */
lora_pwr_enable: lora-pwr-enable {
compatible = "regulator-fixed";
regulator-name = "lora-pwr-enable";
enable-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
regulator-boot-on;
startup-delay-us = <10000>;
};
/* GPS power control */
gps_en: gps-enable {
compatible = "gpio-leds";
gps_enable_pin: gps_enable {
gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
label = "GPS Enable";
};
};
/* ---- Battery ADC ---- */
/* P0.05 (AIN3), 150k+150k divider (same net as RAK4631). GAIN_1_6 + internal ref.
* mV = raw * mult / 4096; mult 7200 = 3.6 V full-scale at pin × 2 (see thinknode_m3.dts). */
zephyr,user {
io-channels = <&adc 3>;
vbat-mv-multiplier = <7200>;
};
/* ---- Buzzer on PWM0 ---- */
pwmbuzzer {
compatible = "pwm-leds";
buzzer: buzzer {
pwms = <&pwm0 0 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
};
};
};
/* ---- SoC configuration ---- */
&reg0 {
status = "okay";
};
&reg1 {
regulator-initial-mode = <NRF5X_REG_MODE_DCDC>;
};
&adc {
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
/* Battery voltage on P0.05 (AIN3) */
channel@3 {
reg = <3>;
zephyr,gain = "ADC_GAIN_1_6";
zephyr,reference = "ADC_REF_INTERNAL";
zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_MICROSECONDS, 10)>;
zephyr,input-positive = <NRF_SAADC_AIN3>;
zephyr,resolution = <12>;
};
};
&uicr {
nfct-pins-as-gpios;
};
&gpiote {
status = "okay";
};
&gpio0 {
status = "okay";
};
&gpio1 {
status = "okay";
};
/* ---- PWM0 for buzzer ---- */
&pwm0 {
status = "okay";
pinctrl-0 = <&pwm0_default>;
pinctrl-1 = <&pwm0_sleep>;
pinctrl-names = "default", "sleep";
};
/* ---- GPS on UART0 (AT6558R, 9600 baud) ----
* Uses luatos,air530z driver for NMEA with power control.
* GPS power controlled via on-off-gpios (P1.02 = GPS_EN). */
&uart0 {
compatible = "nordic,nrf-uarte";
status = "okay";
current-speed = <9600>;
pinctrl-0 = <&uart0_default>;
pinctrl-1 = <&uart0_sleep>;
pinctrl-names = "default", "sleep";
gnss: gnss {
compatible = "luatos,air530z";
on-off-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
};
};
/* ---- I2C0 for sensors ---- */
&i2c0 {
compatible = "nordic,nrf-twim";
status = "okay";
clock-frequency = <I2C_BITRATE_FAST>;
pinctrl-0 = <&i2c0_default>;
pinctrl-1 = <&i2c0_sleep>;
pinctrl-names = "default", "sleep";
/* All supported environment & power sensors — auto-detected at runtime */
#include "../../common/sensors-i2c.dtsi"
};
/* ---- SPI2 for LoRa SX1262 ---- */
&spi2 {
compatible = "nordic,nrf-spim";
status = "okay";
pinctrl-0 = <&spi2_default>;
pinctrl-1 = <&spi2_sleep>;
pinctrl-names = "default", "sleep";
cs-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>; /* P1.10 (Arduino 42) LORA_CS */
lora: lora@0 {
compatible = "semtech,sx1262";
reg = <0>;
spi-max-frequency = <8000000>;
/* LoRa control pins */
reset-gpios = <&gpio1 6 GPIO_ACTIVE_LOW>; /* P1.06 (Arduino 38) */
busy-gpios = <&gpio1 14 GPIO_ACTIVE_HIGH>; /* P1.14 (Arduino 46) */
dio1-gpios = <&gpio1 15 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>; /* P1.15 (Arduino 47) */
/* DIO2 drives RF switch for TX */
dio2-tx-enable;
/* TCXO voltage 1.8V via DIO3 */
dio3-tcxo-voltage = <SX126X_DIO3_TCXO_1V8>;
tcxo-power-startup-delay-ms = <5>;
/* RX boosted mode for better sensitivity */
rx-boosted;
};
};
/* ---- QSPI Flash — not present on WisMesh Tag ---- */
&qspi {
status = "disabled";
};
/* ---- USB CDC for console/CLI ---- */
zephyr_udc0: &usbd {
compatible = "nordic,nrf-usbd";
status = "okay";
cdc_acm_uart: cdc_acm_uart {
compatible = "zephyr,cdc-acm-uart";
};
};
/* ---- Flash partitions (SoftDevice v6, app@0x26000) ---- */
#include "../../common/nrf52_partitions_sdv6.dtsi"
#include "../../common/nrf52_wakeup.dtsi"
/*
* RAK WisMesh Tag — nRF52840 + SX1262 (card-sized GPS tracker)
* Copyright (c) 2025 ZephCore
*
* SPDX-License-Identifier: Apache-2.0
*
* Hardware:
* - nRF52840 SoC with BLE 5
* - SX1262 LoRa radio (DIO2 as RF switch, TCXO 1.8V via DIO3)
* - AT6558R GNSS on UART0 at 9600 baud
* - LIS2DH 3-axis accelerometer on I2C0
* - 1000 mAh battery with ADC on AIN3 (P0.05)
* - Buzzer on PWM0 (P0.21)
* - LEDs: GREEN=P1.03 (TX, active HIGH), BLUE=P1.04 (status, active HIGH)
* - User button on P0.09 (NFC1, active LOW)
* - Board power enable on P0.12
* - No display, no QSPI flash
* - IP66 sealed, pogo-pin USB interface
*
* Pin mappings (from Arduino MeshCore variant.h):
* - LoRa SPI: SCK=P1.11, MOSI=P1.12, MISO=P1.13, CS=P1.10
* - LoRa ctl: DIO1=P1.15, BUSY=P1.14, RESET=P1.06, PWR_EN=P1.05
* - I2C: SDA=P0.25, SCL=P0.24
* - GPS: TX=P0.16, RX=P0.15, EN=P1.02, PPS=P0.17
*/
/dts-v1/;
#include <nordic/nrf52840_qiaa.dtsi>
#include "rak_wismesh_tag-pinctrl.dtsi"
#include <zephyr/dt-bindings/lora/sx126x.h>
#include <zephyr/dt-bindings/adc/nrf-saadc.h>
#include <zephyr/dt-bindings/input/input-event-codes.h>
#include <zephyr/dt-bindings/pwm/pwm.h>
/ {
model = "RAK WisMesh Tag";
compatible = "rak,wismesh-tag";
chosen {
zephyr,sram = &sram0;
zephyr,flash = &flash0;
zephyr,code-partition = &code_partition;
zephyr,console = &cdc_acm_uart;
zephyr,shell-uart = &cdc_acm_uart;
};
aliases {
lora0 = &lora;
led0 = &led_green;
led1 = &led_blue;
lora-tx-led = &led_green;
sw0 = &user_button;
watchdog0 = &wdt0;
buzzer = &buzzer;
gps-enable = &gps_enable_pin;
};
/* ---- LEDs (active HIGH per Arduino LED_STATE_ON=HIGH) ---- */
leds {
compatible = "gpio-leds";
led_green: led_0 {
gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
label = "Green LED";
};
led_blue: led_1 {
gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
label = "Blue LED";
};
};
/* ---- Button (P0.09/NFC1, active LOW with pull-up) ---- */
buttons: buttons {
compatible = "gpio-keys";
user_button: button_0 {
gpios = <&gpio0 9 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
zephyr,code = <INPUT_KEY_0>;
label = "User Button";
};
};
/* Input filter: long-press (1000ms) */
user_btn_longpress {
compatible = "zephyr,input-longpress";
input = <&buttons>;
input-codes = <INPUT_KEY_0>;
short-codes = <INPUT_KEY_A>;
long-codes = <INPUT_KEY_POWER>;
long-delay-ms = <1000>;
};
/* Input filter: multi-tap
* 1 tap → KEY_1 = (reserved / next page if display added)
* 2 taps → KEY_B = flood advert
* 3 taps → KEY_D = buzzer mute toggle
* 4 taps → KEY_C = GPS on/off
* 5 taps → KEY_E = LED heartbeat toggle */
user_btn_multitap {
compatible = "zephcore,input-multi-tap";
input-codes = <INPUT_KEY_A>;
tap-codes = <INPUT_KEY_1 INPUT_KEY_B INPUT_KEY_D INPUT_KEY_C INPUT_KEY_E>;
tap-delay-ms = <400>;
};
/* ---- Power control ---- */
/* Board power enable — must be HIGH for peripherals */
pwr_enable: pwr-enable {
compatible = "regulator-fixed";
regulator-name = "pwr-enable";
enable-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
regulator-boot-on;
};
/* LoRa radio power enable — must be HIGH before SX1262 can communicate */
lora_pwr_enable: lora-pwr-enable {
compatible = "regulator-fixed";
regulator-name = "lora-pwr-enable";
enable-gpios = <&gpio1 5 GPIO_ACTIVE_HIGH>;
regulator-boot-on;
startup-delay-us = <10000>;
};
/* GPS power control */
gps_en: gps-enable {
compatible = "gpio-leds";
gps_enable_pin: gps_enable {
gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
label = "GPS Enable";
};
};
/* ---- Battery ADC ---- */
/* P0.05 (AIN3), same divider circuit as RAK4631
* Arduino ADC_MULTIPLIER = (3 * 1.73 * 1.187 * 1000) ≈ 6161,
* applied to 12-bit average with default ref (GAIN_1_6 + 0.6V internal = 3.6V FS). */
zephyr,user {
io-channels = <&adc 3>;
vbat-mv-multiplier = <6161>;
};
/* ---- Buzzer on PWM0 ---- */
pwmbuzzer {
compatible = "pwm-leds";
buzzer: buzzer {
pwms = <&pwm0 0 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
};
};
};
/* ---- SoC configuration ---- */
&reg0 {
status = "okay";
};
&reg1 {
regulator-initial-mode = <NRF5X_REG_MODE_DCDC>;
};
&adc {
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
/* Battery voltage on P0.05 (AIN3) */
channel@3 {
reg = <3>;
zephyr,gain = "ADC_GAIN_1_6";
zephyr,reference = "ADC_REF_INTERNAL";
zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_MICROSECONDS, 10)>;
zephyr,input-positive = <NRF_SAADC_AIN3>;
zephyr,resolution = <12>;
};
};
&uicr {
nfct-pins-as-gpios;
};
&gpiote {
status = "okay";
};
&gpio0 {
status = "okay";
};
&gpio1 {
status = "okay";
};
/* ---- PWM0 for buzzer ---- */
&pwm0 {
status = "okay";
pinctrl-0 = <&pwm0_default>;
pinctrl-1 = <&pwm0_sleep>;
pinctrl-names = "default", "sleep";
};
/* ---- GPS on UART0 (AT6558R, 9600 baud) ----
* Uses luatos,air530z driver for NMEA with power control.
* GPS power controlled via on-off-gpios (P1.02 = GPS_EN). */
&uart0 {
compatible = "nordic,nrf-uarte";
status = "okay";
current-speed = <9600>;
pinctrl-0 = <&uart0_default>;
pinctrl-1 = <&uart0_sleep>;
pinctrl-names = "default", "sleep";
gnss: gnss {
compatible = "luatos,air530z";
on-off-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
};
};
/* ---- I2C0 for sensors ---- */
&i2c0 {
compatible = "nordic,nrf-twim";
status = "okay";
clock-frequency = <I2C_BITRATE_FAST>;
pinctrl-0 = <&i2c0_default>;
pinctrl-1 = <&i2c0_sleep>;
pinctrl-names = "default", "sleep";
/* All supported environment & power sensors — auto-detected at runtime */
#include "../../common/sensors-i2c.dtsi"
};
/* ---- SPI2 for LoRa SX1262 ---- */
&spi2 {
compatible = "nordic,nrf-spim";
status = "okay";
pinctrl-0 = <&spi2_default>;
pinctrl-1 = <&spi2_sleep>;
pinctrl-names = "default", "sleep";
cs-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>; /* P1.10 (Arduino 42) LORA_CS */
lora: lora@0 {
compatible = "semtech,sx1262";
reg = <0>;
spi-max-frequency = <8000000>;
/* LoRa control pins */
reset-gpios = <&gpio1 6 GPIO_ACTIVE_LOW>; /* P1.06 (Arduino 38) */
busy-gpios = <&gpio1 14 GPIO_ACTIVE_HIGH>; /* P1.14 (Arduino 46) */
dio1-gpios = <&gpio1 15 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>; /* P1.15 (Arduino 47) */
/* DIO2 drives RF switch for TX */
dio2-tx-enable;
/* TCXO voltage 1.8V via DIO3 */
dio3-tcxo-voltage = <SX126X_DIO3_TCXO_1V8>;
tcxo-power-startup-delay-ms = <5>;
/* RX boosted mode for better sensitivity */
rx-boosted;
};
};
/* ---- QSPI Flash — not present on WisMesh Tag ---- */
&qspi {
status = "disabled";
};
/* ---- USB CDC for console/CLI ---- */
zephyr_udc0: &usbd {
compatible = "nordic,nrf-usbd";
status = "okay";
cdc_acm_uart: cdc_acm_uart {
compatible = "zephyr,cdc-acm-uart";
};
};
/* ---- Flash partitions (SoftDevice v6, app@0x26000) ---- */
#include "../../common/nrf52_partitions_sdv6.dtsi"
#include "../../common/nrf52_wakeup.dtsi"