diff --git a/TeensyModules/AIO v4 Firmware/AIO_v4_Firmware/AIO_v4_Firmware.ino b/TeensyModules/AIO v4 Firmware/AIO_v4_Firmware/AIO_v4_Firmware.ino
index 3f068ce..1a49c90 100644
--- a/TeensyModules/AIO v4 Firmware/AIO_v4_Firmware/AIO_v4_Firmware.ino	
+++ b/TeensyModules/AIO v4 Firmware/AIO_v4_Firmware/AIO_v4_Firmware.ino	
@@ -28,9 +28,15 @@
 // Serial Ports
 #define SerialAOG Serial                //AgIO USB conection
 #define SerialRTK Serial3               //RTK radio
-HardwareSerial* SerialGPS = &Serial7;   //Main postion receiver (GGA)
-HardwareSerial* SerialGPS2 = &Serial2;  //Dual heading receiver 
-HardwareSerial* SerialIMU = &Serial5;   //IMU BNO-085
+#if defined(__IMXRT1062__)
+  HardwareSerialIMXRT* SerialGPS = &Serial7; //Main postion receiver (GGA)
+  HardwareSerialIMXRT* SerialGPS2 = &Serial2; //Dual heading receiver
+  HardwareSerialIMXRT* SerialIMU = &Serial5; //IMU
+#else
+  HardwareSerial* SerialGPS = &Serial7;
+  HardwareSerial* SerialGPS2 = &Serial2;
+  HardwareSerial* SerialIMU = &Serial5;
+#endif
 
 constexpr int serial_buffer_size = 512;
 
diff --git a/TeensyModules/AIO v4 Firmware/AIO_v4_Firmware_Keya_CANBUS_HPR_Dual_27.04.2025/AIO_v4_Firmware_Keya_CANBUS_HPR_Dual_27.04.2025.ino b/TeensyModules/AIO v4 Firmware/AIO_v4_Firmware_Keya_CANBUS_HPR_Dual_27.04.2025/AIO_v4_Firmware_Keya_CANBUS_HPR_Dual_27.04.2025.ino
index 1ea2d60..893d7c9 100644
--- a/TeensyModules/AIO v4 Firmware/AIO_v4_Firmware_Keya_CANBUS_HPR_Dual_27.04.2025/AIO_v4_Firmware_Keya_CANBUS_HPR_Dual_27.04.2025.ino	
+++ b/TeensyModules/AIO v4 Firmware/AIO_v4_Firmware_Keya_CANBUS_HPR_Dual_27.04.2025/AIO_v4_Firmware_Keya_CANBUS_HPR_Dual_27.04.2025.ino	
@@ -2,9 +2,16 @@
 // Serial Ports
 #define SerialAOG Serial                //AgIO USB conection
 #define SerialRTK Serial3               //RTK radio
-HardwareSerial* SerialGPS = &Serial7;   //Main postion receiver (GGA)
-HardwareSerial* SerialGPS2 = &Serial2;  //Dual heading receiver 
-HardwareSerial* SerialIMU = &Serial5;   //IMU
+
+#if defined(__IMXRT1062__)
+  HardwareSerialIMXRT* SerialGPS = &Serial7; //Main postion receiver (GGA)
+  HardwareSerialIMXRT* SerialGPS2 = &Serial2; //Dual heading receiver 
+  HardwareSerialIMXRT* SerialIMU = &Serial5; //IMU
+#else
+  HardwareSerial* SerialGPS = &Serial7;
+  HardwareSerial* SerialGPS2 = &Serial2;
+  HardwareSerial* SerialIMU = &Serial5;
+#endif
 
 constexpr int serial_buffer_size = 1023;