GPS for STM32WL (#7297)

* Enable GPS for Wio-E5 variant on Serial2

* Add ability to override GPS serial port using GPS_SERIAL_PORT, and make RAK2560 use it.

* Don't try to send ATAK packets if ATAK is disabled, +4k flash

variants/rak2560/variant.h

@@ -222,6 +222,7 @@ SO GPIO 39/TXEN MAY NOT BE DEFINED FOR SUCCESSFUL OPERATION OF THE SX1262 - TG
 // #define PIN_GPS_EN PIN_3V3_EN
 #define PIN_GPS_PPS (17) // Pulse per second input from the GPS
 
+#define GPS_SERIAL_PORT Serial2
 // On RAK2560 the GPS is be on a different UART
 // #define GPS_RX_PIN PIN_SERIAL2_RX
 // #define GPS_TX_PIN PIN_SERIAL2_TX

variants/wio-e5/platformio.ini

@@ -15,7 +15,12 @@ build_flags =
   -DRADIOLIB_EXCLUDE_SX128X=1
   -DRADIOLIB_EXCLUDE_SX127X=1
   -DRADIOLIB_EXCLUDE_LR11X0=1
-  -DHAS_SENSOR
+  -DHAS_SENSOR=1
+  -DENABLE_HWSERIAL2
+  -DPIN_SERIAL2_TX=PA2
+  -DPIN_SERIAL2_RX=PA3
+  -DHAS_GPS=1
+  -DGPS_SERIAL_PORT=Serial2
 
 upload_port = stlink
 

variants/wio-e5/variant.h

@@ -17,6 +17,8 @@ Do not expect a working Meshtastic device with this target.
 #define LED_PIN PB5
 #define LED_STATE_ON 1
 
+#define WIO_E5
+
 #if (defined(LED_BUILTIN) && LED_BUILTIN == PNUM_NOT_DEFINED)
 #undef LED_BUILTIN
 #define LED_BUILTIN (LED_PIN)