added serial GPS support to EnvironmentSensorClass

based on T114 serial GPS and EnvironmentSensorClass.

variants/promicro/platformio.ini

@@ -13,6 +13,9 @@ build_flags = ${nrf52840_base.build_flags}
   -D PIN_BOARD_SDA=8
   -D PIN_OLED_RESET=-1
   -D PIN_USER_BTN=6
+  -D PIN_GPS_RX=3
+  -D PIN_GPS_TX=4
+  -D PIN_GPS_EN=5
 build_src_filter = ${nrf52840_base.build_src_filter}
   +<helpers/nrf52/PromicroBoard.cpp>
   +<helpers/sensors>  
@@ -23,7 +26,8 @@ lib_deps= ${nrf52840_base.lib_deps}
   adafruit/Adafruit INA219 @ ^1.2.3
   adafruit/Adafruit AHTX0 @ ^2.0.5
   adafruit/Adafruit BME280 Library @ ^2.3.0  
-
+  stevemarple/MicroNMEA @ ^2.0.6
+  
 [env:Faketec_Repeater]
 extends = Faketec
 build_src_filter = ${Faketec.build_src_filter}