Add SPA06 barometer telemetry and charge status LED for MeshTracker X1

examples/companion_radio/ui-orig/UITask.cpp

@@ -337,6 +337,36 @@ void UITask::userLedHandler() {
     next_batt_check = cur_time + 60000;
   }
 
+#ifdef EXT_CHRG_DETECT
+  // charge status display while docked (skipped when messages are waiting,
+  // so the unread indication is never masked)
+  static unsigned long next_pwr_check = 0;
+  static bool ext_powered = false, ext_charging = false;
+  if (cur_time > next_pwr_check) {
+    ext_powered = _board->isExternalPowered();
+    bool chrg = digitalRead(EXT_CHRG_DETECT) == LOW;
+  #ifdef EXT_CHRG_DONE
+    if (digitalRead(EXT_CHRG_DONE) == LOW) chrg = false;   // charge-done wins
+  #endif
+    ext_charging = ext_powered && chrg;
+    next_pwr_check = cur_time + 1000;
+  }
+  if (ext_powered && _msgcount == 0) {
+    if (ext_charging) {
+      // amber breathing while charging
+      int ph = cur_time % 2000;
+      int v = ph < 1000 ? ph : 2000 - ph;
+      uint8_t lvl = (uint8_t)(v * 255 / 1000);
+      statusLedWrite(lvl, (uint8_t)(lvl * 35 / 100), 0);
+    } else {
+      statusLedWrite(0, 40, 0);   // dim solid green: charge complete
+    }
+    state = 0;
+    next_change = cur_time;
+    return;
+  }
+#endif
+
   if (cur_time > next_change) {
     if (state == 0) {
       state = 1;

variants/meshtracker_x1/platformio.ini

@@ -32,6 +32,8 @@ build_flags = ${nrf52_base.build_flags}
 build_src_filter = ${nrf52_base.build_src_filter}
   +<helpers/*.cpp>
   +<../variants/meshtracker_x1>
+lib_deps = ${nrf52_base.lib_deps}
+  https://github.com/adafruit/Adafruit_SPA06_003/archive/refs/tags/1.0.2.zip
 debug_tool = jlink
 upload_protocol = nrfutil
 

variants/meshtracker_x1/target.cpp

@@ -67,6 +67,17 @@ void MeshTrackerX1SensorManager::stop_gps() {
 bool MeshTrackerX1SensorManager::begin() {
   // init GPS
   Serial1.begin(GPS_BAUD_RATE);
+
+  // init SPA06-003 barometer
+  baro_ok = spa06.begin(SPA06_003_DEFAULT_ADDR, &Wire) || spa06.begin(0x76, &Wire);
+  if (baro_ok) {
+    spa06.setPressureOversampling(SPA06_003_OVERSAMPLE_8);
+    spa06.setTemperatureOversampling(SPA06_003_OVERSAMPLE_8);
+    // 1 Hz continuous keeps reads non-blocking at minimal power cost
+    spa06.setPressureMeasureRate(SPA06_003_RATE_1);
+    spa06.setTemperatureMeasureRate(SPA06_003_RATE_1);
+    spa06.setMeasurementMode(SPA06_003_MEAS_CONTINUOUS_BOTH);
+  }
   return true;
 }
 
@@ -74,12 +85,17 @@ bool MeshTrackerX1SensorManager::querySensors(uint8_t requester_permissions, Cay
   if (requester_permissions & TELEM_PERM_LOCATION) {   // does requester have permission?
     telemetry.addGPS(TELEM_CHANNEL_SELF, node_lat, node_lon, node_altitude);
   }
+  if (requester_permissions & TELEM_PERM_ENVIRONMENT && baro_ok) {
+    telemetry.addTemperature(TELEM_CHANNEL_SELF, spa06.readTemperature());
+    telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, spa06.readPressure());
+  }
   return true;
 }
 
 void MeshTrackerX1SensorManager::loop() {
   static long next_gps_update = 0;
 
+
   _nmea->loop();
 
   if (millis() > next_gps_update) {

variants/meshtracker_x1/target.h

@@ -8,12 +8,15 @@
 #include <helpers/ArduinoHelpers.h>
 #include <helpers/SensorManager.h>
 #include <helpers/sensors/LocationProvider.h>
+#include <Adafruit_SPA06_003.h>
 #ifdef DISPLAY_CLASS
   #include "NullDisplayDriver.h"
 #endif
 
 class MeshTrackerX1SensorManager: public SensorManager {
   bool gps_active = false;
+  bool baro_ok = false;
+  Adafruit_SPA06_003 spa06;
   LocationProvider * _nmea;
 
   void start_gps();

variants/meshtracker_x1/variant.cpp

@@ -62,7 +62,8 @@ const uint32_t g_ADigitalPinMap[PINS_COUNT + 1] =
 void initVariant()
 {
   pinMode(BATTERY_PIN, INPUT);
-  pinMode(EXT_CHRG_DETECT, INPUT);
+  pinMode(EXT_CHRG_DETECT, INPUT_PULLUP);
+  pinMode(EXT_CHRG_DONE, INPUT_PULLUP);
   pinMode(EXT_PWR_DETECT, INPUT);
   pinMode(PIN_BUTTON1, INPUT_PULLDOWN);
 

variants/meshtracker_x1/variant.h

@@ -25,6 +25,7 @@
 #define ADC_MULTIPLIER          (2.0F)
 
 #define EXT_CHRG_DETECT         (35)            // P1.3, LOW while charging
+#define EXT_CHRG_DONE           (36)            // P1.4, LOW when charge complete
 #define EXT_PWR_DETECT          (5)             // P0.5
 
 #define ADC_RESOLUTION          (14)