diff --git a/src/helpers/sensors/EnvironmentSensorManager.cpp b/src/helpers/sensors/EnvironmentSensorManager.cpp
index f314f6774..ab9487f87 100644
--- a/src/helpers/sensors/EnvironmentSensorManager.cpp
+++ b/src/helpers/sensors/EnvironmentSensorManager.cpp
@@ -47,13 +47,10 @@ 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)
+#if ENV_INCLUDE_GPS && RAK_BOARD
+static uint32_t gpsResetPin = 0;
+static bool i2cGPSFlag = false;
+static bool serialGPSFlag = false;
 #define TELEM_RAK12500_ADDRESS   0x42     //RAK12500 Ublox GPS via i2c
 #include <SparkFun_u-blox_GNSS_Arduino_Library.h>
 static SFE_UBLOX_GNSS ublox_GNSS;
@@ -323,8 +320,6 @@ void EnvironmentSensorManager::rakGPSInit(){
   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");
@@ -356,9 +351,9 @@ bool EnvironmentSensorManager::gpsIsAwake(uint8_t ioPin){
   //set initial waking state
   pinMode(ioPin,OUTPUT);
   digitalWrite(ioPin,LOW);
-  delay(1000);
+  delay(500);
   digitalWrite(ioPin,HIGH);
-  delay(1000);
+  delay(500);
 
   //Try to init RAK12500 on I2C
   if (ublox_GNSS.begin(Wire) == true){
diff --git a/variants/rak4631/platformio.ini b/variants/rak4631/platformio.ini
index 95ea5b087..33d3fbc86 100644
--- a/variants/rak4631/platformio.ini
+++ b/variants/rak4631/platformio.ini
@@ -5,6 +5,7 @@ board = wiscore_rak4631
 board_check = true
 build_flags = ${nrf52_base.build_flags}
   -I variants/rak4631
+  -D RAK_4631
   -D RAK_BOARD
   -D PIN_BOARD_SCL=14
   -D PIN_BOARD_SDA=13
@@ -18,6 +19,9 @@ build_flags = ${nrf52_base.build_flags}
   -D SX126X_CURRENT_LIMIT=140
   -D SX126X_RX_BOOSTED_GAIN=1
   -D ENV_INCLUDE_GPS=1
+  -D ENV_INCLUDE_SHTC3=1
+  -D ENV_INCLUDE_LPS22HB=1
+  -D ENV_INCLUDE_INA219=1
 build_src_filter = ${nrf52_base.build_src_filter}
   +<../variants/rak4631>
   +<helpers/sensors> 
@@ -25,7 +29,10 @@ lib_deps =
   ${nrf52_base.lib_deps}
   adafruit/Adafruit SSD1306 @ ^2.5.13
   stevemarple/MicroNMEA @ ^2.0.6
-  sparkfun/SparkFun u-blox GNSS Arduino Library @ ^2.2.27
+  adafruit/Adafruit SHTC3 Library@^1.0.1
+  arduino-libraries/Arduino_LPS22HB@^1.0.2
+  adafruit/Adafruit INA219@^1.2.3
+  sparkfun/SparkFun u-blox GNSS Arduino Library@^2.2.27
 
 [env:RAK_4631_Repeater]
 extends = rak4631