RAK4631 ESM Migration

Changes to migrate sensor code to the ESM.

Added a separate GPS init sequence for the RAK that scans I2C and Serial1 on the various sockets of the various base boards to find the RAK12500. (and soon the RAK12501)

Removed the GPS specific envs from platformio.ini and enabled GPS for all envs.

Verified working with RAK12500 on RAK19007 sockets A and D, as well as RAK19003.

src/helpers/sensors/EnvironmentSensorManager.cpp

@@ -47,10 +47,26 @@ static Adafruit_INA3221 INA3221;
 static Adafruit_INA219 INA219(TELEM_INA219_ADDRESS);
 #endif
 
+#if ENV_INCLUDE_GPS & RAK_BOARD
+uint32_t gpsResetPin = 0;
+bool i2cGPSFlag = false;
+bool serialGPSFlag = false;
+//#define PIN_GPS_STANDBY_A 34  //GPS Reset/Standby pin (IO2 for socket A)
+//#define PIN_GPS_STANDBY_C 4   //GPS Reset/Standby pin (IO4 for socket C)
+//#define PIN_GPS_STANDBY_F 9   //GPS Reset/Standby pin (IO5 for socket F)
+#define TELEM_RAK12500_ADDRESS   0x42     //RAK12500 Ublox GPS via i2c
+#include <SparkFun_u-blox_GNSS_Arduino_Library.h>
+static SFE_UBLOX_GNSS ublox_GNSS;
+#endif
+
 bool EnvironmentSensorManager::begin() {
   #if ENV_INCLUDE_GPS
+  #if RAK_BOARD
+  rakGPSInit();   //probe base board/sockets for GPS
+  #else
   initBasicGPS();
   #endif
+  #endif
 
   #if ENV_INCLUDE_AHTX0
   if (AHTX0.begin(&Wire, 0, TELEM_AHTX_ADDRESS)) {
@@ -296,8 +312,87 @@ void EnvironmentSensorManager::initBasicGPS() {
   gps_active = false; //Set GPS visibility off until setting is changed
 }
 
+#ifdef RAK_BOARD
+void EnvironmentSensorManager::rakGPSInit(){
+
+  Serial1.setPins(PIN_GPS_TX, PIN_GPS_RX);
+
+  #ifdef GPS_BAUD_RATE
+  Serial1.begin(GPS_BAUD_RATE);
+  #else
+  Serial1.begin(9600);
+  #endif
+
+  delay(1000);
+
+  //search for the correct IO standby pin depending on socket used
+  if(gpsIsAwake(WB_IO2)){
+  //  MESH_DEBUG_PRINTLN("RAK base board is RAK19007/10");
+  //  MESH_DEBUG_PRINTLN("GPS is installed on Socket A");
+  }
+  else if(gpsIsAwake(WB_IO4)){
+  //  MESH_DEBUG_PRINTLN("RAK base board is RAK19003/9");
+  //  MESH_DEBUG_PRINTLN("GPS is installed on Socket C"); 
+  }
+  else if(gpsIsAwake(WB_IO5)){
+  //  MESH_DEBUG_PRINTLN("RAK base board is RAK19001/11");
+  //  MESH_DEBUG_PRINTLN("GPS is installed on Socket F");
+  }
+  else{
+    MESH_DEBUG_PRINTLN("No GPS found"); 
+    gps_active = false;
+    gps_detected = false;
+    return;
+  }
+
+  #ifndef FORCE_GPS_ALIVE // for use with repeaters, until GPS toggle is implimented
+  //Now that GPS is found and set up, set to sleep for initial state
+  stop_gps();
+  #endif
+}
+
+bool EnvironmentSensorManager::gpsIsAwake(uint8_t ioPin){
+
+  //set initial waking state
+  pinMode(ioPin,OUTPUT);
+  digitalWrite(ioPin,LOW);
+  delay(1000);
+  digitalWrite(ioPin,HIGH);
+  delay(1000);
+
+  //Try to init RAK12500 on I2C
+  if (ublox_GNSS.begin(Wire) == true){
+    MESH_DEBUG_PRINTLN("RAK12500 GPS init correctly with pin %i",ioPin);
+    ublox_GNSS.setI2COutput(COM_TYPE_NMEA);
+    ublox_GNSS.saveConfigSelective(VAL_CFG_SUBSEC_IOPORT);
+    gpsResetPin = ioPin;
+    i2cGPSFlag = true;
+    gps_active = true;
+    gps_detected = true;
+    return true;
+  }
+  else if(Serial1){
+    MESH_DEBUG_PRINTLN("Serial GPS init correctly and is turned on");
+    if(PIN_GPS_EN){
+      gpsResetPin = PIN_GPS_EN;
+    }
+    serialGPSFlag = true;
+    gps_active = true;
+    gps_detected = true;
+    return true;
+  }
+  MESH_DEBUG_PRINTLN("GPS did not init with this IO pin... try the next");
+  return false;
+}
+#endif
+
 void EnvironmentSensorManager::start_gps() {
   gps_active = true;
+  #ifdef RAK_BOARD
+    pinMode(gpsResetPin, OUTPUT);
+    digitalWrite(gpsResetPin, HIGH);
+    return;
+  #endif
   #ifdef PIN_GPS_EN
     pinMode(PIN_GPS_EN, OUTPUT);
     digitalWrite(PIN_GPS_EN, HIGH);
@@ -309,6 +404,11 @@ void EnvironmentSensorManager::start_gps() {
 
 void EnvironmentSensorManager::stop_gps() {
   gps_active = false;
+  #ifdef RAK_BOARD
+    pinMode(gpsResetPin, OUTPUT);
+    digitalWrite(gpsResetPin, LOW);
+    return;
+  #endif
   #ifdef PIN_GPS_EN
     pinMode(PIN_GPS_EN, OUTPUT);
     digitalWrite(PIN_GPS_EN, LOW);
@@ -324,11 +424,28 @@ void EnvironmentSensorManager::loop() {
   _location->loop();
 
   if (millis() > next_gps_update) {
-    if (gps_active && _location->isValid()) {
+    if(gps_active){
+    #ifndef RAK_BOARD
+    if (_location->isValid()) {
       node_lat = ((double)_location->getLatitude())/1000000.;
       node_lon = ((double)_location->getLongitude())/1000000.;
       MESH_DEBUG_PRINTLN("lat %f lon %f", node_lat, node_lon);
     }
+    #else
+    if(i2cGPSFlag){
+      node_lat = ((double)ublox_GNSS.getLatitude())/10000000.;
+      node_lon = ((double)ublox_GNSS.getLongitude())/10000000.;
+      MESH_DEBUG_PRINTLN("lat %f lon %f", node_lat, node_lon);
+    }
+    else if (serialGPSFlag && _location->isValid()) {
+      node_lat = ((double)_location->getLatitude())/1000000.;
+      node_lon = ((double)_location->getLongitude())/1000000.;
+      MESH_DEBUG_PRINTLN("lat %f lon %f", node_lat, node_lon);
+    }
+    //else
+    //MESH_DEBUG_PRINTLN("No valid GPS data");
+    #endif
+    }
     next_gps_update = millis() + 1000;
   }
 }

src/helpers/sensors/EnvironmentSensorManager.h

@@ -24,6 +24,10 @@ protected:
   void start_gps();
   void stop_gps();
   void initBasicGPS();
+  #ifdef RAK_BOARD
+  void rakGPSInit();
+  bool gpsIsAwake(uint8_t ioPin);
+  #endif
   #endif