diff --git a/firmware/config/stm32f4ems/efifeatures.h b/firmware/config/stm32f4ems/efifeatures.h
index aa3a524b41..b543b71053 100644
--- a/firmware/config/stm32f4ems/efifeatures.h
+++ b/firmware/config/stm32f4ems/efifeatures.h
@@ -178,6 +178,10 @@
 #define EFI_CAN_SUPPORT TRUE
 #endif
 
+#ifndef EFI_AUX_SERIAL
+#define EFI_AUX_SERIAL TRUE
+#endif
+
 #ifndef EFI_HD44780_LCD
 #define EFI_HD44780_LCD TRUE
 #endif
@@ -343,6 +347,8 @@
 //#define TS_UART_DEVICE (&UARTD3)
 #define TS_SERIAL_DEVICE (&SD3)
 
+#define AUX_SERIAL_DEVICE (&SD6)
+
 // todo: add DMA-mode for Console?
 #if (TS_UART_DMA_MODE || TS_UART_MODE)
 #undef EFI_CONSOLE_SERIAL_DEVICE
diff --git a/firmware/config/stm32f4ems/mcuconf.h b/firmware/config/stm32f4ems/mcuconf.h
index ed5cac9feb..6ee203ff79 100644
--- a/firmware/config/stm32f4ems/mcuconf.h
+++ b/firmware/config/stm32f4ems/mcuconf.h
@@ -303,7 +303,7 @@
 #define STM32_SERIAL_USE_USART3             TRUE
 #define STM32_SERIAL_USE_UART4              FALSE
 #define STM32_SERIAL_USE_UART5              FALSE
-#define STM32_SERIAL_USE_USART6             FALSE
+#define STM32_SERIAL_USE_USART6             TRUE
 /**
  * UART priority should not be too low so that we do not miss bytes
  */
diff --git a/firmware/config/stm32f7ems/efifeatures.h b/firmware/config/stm32f7ems/efifeatures.h
index ab21b78ecb..bffe61773f 100644
--- a/firmware/config/stm32f7ems/efifeatures.h
+++ b/firmware/config/stm32f7ems/efifeatures.h
@@ -50,11 +50,12 @@
 #define BOARD_TLE8888_COUNT 	1
 #endif
 
-
-
 #undef EFI_CAN_SUPPORT
 #define EFI_CAN_SUPPORT TRUE
 
+#undef EFI_AUX_SERIAL
+#define EFI_AUX_SERIAL TRUE
+
 #undef EFI_HD44780_LCD
 #define EFI_HD44780_LCD TRUE
 
@@ -89,6 +90,8 @@
 #undef TS_SERIAL_DEVICE
 #define TS_SERIAL_DEVICE (&SD3)
 
+#define AUX_SERIAL_DEVICE (&SD6)
+
 // todo: add DMA-mode for Console?
 #if (TS_UART_DMA_MODE || TS_UART_MODE)
 #undef EFI_CONSOLE_SERIAL_DEVICE
diff --git a/firmware/config/stm32f7ems/mcuconf.h b/firmware/config/stm32f7ems/mcuconf.h
index 17d0f340eb..a8410c33f8 100644
--- a/firmware/config/stm32f7ems/mcuconf.h
+++ b/firmware/config/stm32f7ems/mcuconf.h
@@ -315,7 +315,7 @@
 #define STM32_SERIAL_USE_USART3             TRUE
 #define STM32_SERIAL_USE_UART4              FALSE
 #define STM32_SERIAL_USE_UART5              FALSE
-#define STM32_SERIAL_USE_USART6             FALSE
+#define STM32_SERIAL_USE_USART6             TRUE
 #define STM32_SERIAL_USE_UART7              FALSE
 #define STM32_SERIAL_USE_UART8              FALSE
 #define STM32_SERIAL_USART1_PRIORITY        (PRECISE_SCHEDULING_TIMER_PRIORITY + 2)
diff --git a/firmware/controllers/controllers.mk b/firmware/controllers/controllers.mk
index 78dcadfa8f..077d0d4d06 100644
--- a/firmware/controllers/controllers.mk
+++ b/firmware/controllers/controllers.mk
@@ -45,6 +45,8 @@ CONTROLLERS_SRC_CPP = \
  	$(CONTROLLERS_DIR)/engine_controller.cpp \
  	$(CONTROLLERS_DIR)/engine_controller_misc.cpp \
 	$(CONTROLLERS_DIR)/persistent_store.cpp \
+	$(CONTROLLERS_DIR)/serial/serial_rx.cpp \
+	$(CONTROLLERS_DIR)/serial/serial_sensor.cpp \
 
 
 CONTROLLERS_INC=\
@@ -64,4 +66,5 @@ CONTROLLERS_INC=\
 	$(CONTROLLERS_DIR)/generated \
 	$(CONTROLLERS_DIR)/actuators \
 	$(CONTROLLERS_DIR)/actuators/gppwm \
+	$(CONTROLLERS_DIR)/serial \
 
diff --git a/firmware/controllers/sensors/ego.cpp b/firmware/controllers/sensors/ego.cpp
index 7fdfffa110..20ed5a7a4f 100644
--- a/firmware/controllers/sensors/ego.cpp
+++ b/firmware/controllers/sensors/ego.cpp
@@ -96,7 +96,7 @@ void initEgoAveraging(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 #endif
 
 bool hasAfrSensor(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
-	if (CONFIG(enableAemXSeries)) {
+	if (CONFIG(enableAemXSeries) || CONFIG(enableInnovateLC2)) {
 		return true;
 	}
 
@@ -109,6 +109,7 @@ bool hasAfrSensor(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 }
 
 extern float aemXSeriesLambda;
+extern float InnovateLC2AFR;
 
 float getAfr(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 #if EFI_CAN_SUPPORT
@@ -117,6 +118,11 @@ float getAfr(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 	}
 #endif
 
+#if EFI_AUX_SERIAL
+	if (CONFIG(enableInnovateLC2))
+		return InnovateLC2AFR;
+#endif
+
 #if EFI_CJ125 && HAL_USE_SPI
 	if (CONFIG(isCJ125Enabled)) {
 		return cjGetAfr(PASS_ENGINE_PARAMETER_SIGNATURE);
diff --git a/firmware/controllers/serial/serial.h b/firmware/controllers/serial/serial.h
new file mode 100644
index 0000000000..159c68cd2f
--- /dev/null
+++ b/firmware/controllers/serial/serial.h
@@ -0,0 +1,37 @@
+/**
+ * @file	serial.h
+ *
+ * @date Mar 19, 2020
+ * @author Konstantin Smola, (c) 2020
+ */
+
+#pragma once
+
+#include "hal.h"
+
+#include "periodic_thread_controller.h"
+
+#define TIME_100MSEC ((sysinterval_t)chTimeMS2I(100))
+
+#define SERBUFFLEN 64
+
+constexpr uint8_t lc2_header_mask = 162;
+constexpr uint16_t lc2_pcklen_mask = 383;
+
+class Logging;
+
+typedef enum {UNKNOWN, HEADER_FOUND, IDENTIFIED} innovate_serial_id_state_t;
+
+extern uint8_t ser_buffer[SERBUFFLEN]; //buffer for incoming serial data
+extern size_t innovate_msg_len;
+extern innovate_serial_id_state_t innovate_serial_id_state;
+extern uint8_t sb;
+extern bool clear_ser_buffer;
+
+class SerialRead final : public ThreadController<256> {
+public:
+	SerialRead();
+	void ThreadTask();
+
+	uint16_t len;
+};
\ No newline at end of file
diff --git a/firmware/controllers/serial/serial_rx.cpp b/firmware/controllers/serial/serial_rx.cpp
new file mode 100644
index 0000000000..5c75fae85d
--- /dev/null
+++ b/firmware/controllers/serial/serial_rx.cpp
@@ -0,0 +1,58 @@
+/**
+ * @file	serial_rx.cpp
+ *
+ * This file handles auxilery serial communication.
+ *
+ * @date Mar 19, 2020
+ * @author Konstantin Smola, (c) 2020
+ */
+
+#include "globalaccess.h"
+
+#if EFI_AUX_SERIAL
+#include "engine.h"
+#include "serial.h"
+#include "serial_hw.h"
+#include "serial_sensor.h"
+
+#include "allsensors.h"
+#include "vehicle_speed.h"
+
+EXTERN_ENGINE;
+
+static LoggingWithStorage logger("AUX Serial RX");
+
+uint8_t ser_buffer[SERBUFFLEN] = {};
+size_t innovate_msg_len = 1;
+innovate_serial_id_state_t innovate_serial_id_state = UNKNOWN;
+uint8_t sb = 0;
+bool clear_ser_buffer = false;
+
+SerialRead::SerialRead()
+	: ThreadController("AUX Serial RX", NORMALPRIO) {
+}
+
+void SerialRead::ThreadTask() {
+	while (true) {
+		if (CONFIG(enableInnovateLC2)) {
+			len = innovate_msg_len;
+		}
+
+        if (len >= SERBUFFLEN)
+		  len = SERBUFFLEN;
+
+		if (sdReadTimeout(AUX_SERIAL_DEVICE,  &ser_buffer[sb], len, TIME_100MSEC) == len) {
+			ParseSerialData();
+		} else {
+			ResetSerialSensor();
+		}
+		
+		//clear buffer every frame to avoid parsing old data
+		if (clear_ser_buffer) {
+			ClearSerialBuffer();
+			clear_ser_buffer = false;
+		}
+	}
+}
+
+#endif // EFI_AUX_SERIAL
diff --git a/firmware/controllers/serial/serial_sensor.cpp b/firmware/controllers/serial/serial_sensor.cpp
new file mode 100644
index 0000000000..f864369fda
--- /dev/null
+++ b/firmware/controllers/serial/serial_sensor.cpp
@@ -0,0 +1,191 @@
+/**
+ * @file	serial_sensor.cpp
+ *
+ *
+ * @date Mar 19, 2020
+ * @author Konstantin Smola, (c) 2020
+ */
+
+#include "global.h"
+#if EFI_AUX_SERIAL
+#include "serial.h"
+#include "serial_sensor.h"
+#include "engine.h"
+
+#define NUM_INNOVATE_O2_SENSORS 1
+#define AFR_MULTIPLIER 147
+
+EXTERN_ENGINE;
+
+volatile float InnovateLC2AFR = AFR_ERROR;
+
+typedef enum
+{
+	NO_ERROR = 0,
+	HEATER_SHORTED = 1,
+	HEATER_OPEN = 2,
+	PUMPCELL_SHORTED = 3,
+	PUMPCELL_OPEN = 4,
+	REFCELL_SHORTED = 5,
+	REFCELL_OPEN = 6,
+	SYSTEM_ERROR = 7,
+	SENSOR_TIMING_ERR = 8,
+	SUPP_V_LOW = 9
+} sensor_error_code_t;
+
+typedef struct
+{
+	int function_code;
+	float AFR;
+	float AFR_multiplier;
+	float lambda;
+	float warmup;
+	sensor_error_code_t error_code;
+} sensor_data_t;
+
+static sensor_data_t innovate_o2_sensor[NUM_INNOVATE_O2_SENSORS];
+
+static size_t tmsglen;
+
+void IdentifyInnovateSerialMsg() {		//this identifies an innovate LC1/LC2 o2 sensor by it's first word (header)
+	if (CONFIG(enableInnovateLC2)) {
+		if ((((ser_buffer[0]) & lc2_header_mask) != lc2_header_mask) && innovate_serial_id_state == IDENTIFIED) {		//not serial header word
+			innovate_serial_id_state = UNKNOWN;
+			innovate_msg_len = 1;
+			sb = 0;
+		}
+
+		switch (innovate_serial_id_state) {
+		case UNKNOWN:
+			InnovateLC2AFR = AFR_ERROR;
+			// read one byte, identify with mask, advance and read next byte
+			if (((ser_buffer[0]) & lc2_header_mask) == lc2_header_mask) { // check if it's the first byte of header
+				// first byte identified, now continue reading and advance statemachine
+				innovate_serial_id_state = HEADER_FOUND;
+				innovate_msg_len = 1;
+				sb = 1;
+			} else {
+				innovate_serial_id_state = UNKNOWN;
+			}
+			break;
+
+		case HEADER_FOUND:
+			// now we should have both header bytes in array, and we can read the total packet length
+			tmsglen = (((ser_buffer[0] << 8) | ser_buffer[1]) & lc2_pcklen_mask); //0000000101111111 mask
+
+			if (tmsglen) {
+				tmsglen += 1; // length in words including header (2 bytes)
+				tmsglen *= 2; // length in bytes (incl header)
+				innovate_msg_len = tmsglen - 2;
+				sb = 2;
+				innovate_serial_id_state = IDENTIFIED; //advance state machine
+			} else {
+				innovate_serial_id_state = UNKNOWN;
+			}
+
+			break;
+
+		case IDENTIFIED:
+		    innovate_msg_len = tmsglen;
+			sb = 0;
+			// serial packet fully identified
+			ParseInnovateSerialMsg(); //takes about 570ns
+			clear_ser_buffer = true;
+			break;
+
+		default:
+			break;
+		}
+	}
+}
+
+void ParseInnovateSerialMsg() {
+	float raw_afr;
+	//get error code and afr
+
+	// 000 Lambda valid and Aux data valid, normal operation.
+	// 001 Lambda value contains O2 level in 1/10%
+	// 010 Free air Calib in progress, Lambda data not valid
+	// 011 Need Free air Calibration Request, Lambda data not valid
+	// 100 Warming up, Lambda value is temp in 1/10% of operating temp.
+	// 101 Heater Calibration, Lambda value contains calibration countdown.
+	// 110 Error code in Lambda value
+	// 111 reserved
+
+	for (size_t i = 0; i < ((tmsglen - 2) / 4) && i < NUM_INNOVATE_O2_SENSORS; i++) {
+		innovate_o2_sensor[i].function_code = (ser_buffer[2 + i * 4] >> 2 & 0x7);
+		// innovate_o2_sensor[i].AFR_multiplier = ((ser_buffer[2 + i * 4] << 7 | ser_buffer[3 + i * 4]) & 0xFF);
+		innovate_o2_sensor[i].AFR_multiplier = AFR_MULTIPLIER;
+
+		switch (innovate_o2_sensor[i].function_code) {
+		case 0: //Lambda valid and aux data valid, normal operation
+		case 1: //Lambda value contains o2 level in 1/10%
+			innovate_o2_sensor[i].lambda = ((ser_buffer[4 + i * 4] << 7 | ser_buffer[5 + i * 4]) & 0x1FFF);
+			raw_afr = ((innovate_o2_sensor[i].lambda + 500) * innovate_o2_sensor[i].AFR_multiplier);
+
+			if (innovate_o2_sensor[i].function_code) {//case 1
+				innovate_o2_sensor[i].AFR = raw_afr * 0.001;
+			} else { // case 0
+				innovate_o2_sensor[i].AFR = raw_afr * 0.0001;
+			}
+
+			if (innovate_o2_sensor[i].AFR > AFRMAX) {
+				innovate_o2_sensor[i].AFR = AFRMAX;
+			} else if (innovate_o2_sensor[i].AFR < AFRMIN)
+				innovate_o2_sensor[i].AFR = AFRMIN;
+		    }
+
+			InnovateLC2AFR = innovate_o2_sensor[0].AFR; //only using one sensor right now
+
+			break;
+		// this is invalid o2 data, so we can ignore it:
+		//  case 2: // Free air Calib in progress, Lambda data not valid
+		//    break;
+		//  case 3: // Need Free air Calibration Request, Lambda data not valid
+		//    break;
+		case 4: // Warming up, Lambda value is temp in 1/10% of operating temp
+			InnovateLC2AFR = AFR_ERROR;
+			innovate_o2_sensor[i].warmup = ((ser_buffer[4 + i * 4] << 7 | ser_buffer[5 + i * 4]) & 0x1FFF);
+			//catch potential overflow:
+			if (innovate_o2_sensor[i].warmup >= 1023) {
+				innovate_o2_sensor[i].warmup = 1023;
+			} else if (innovate_o2_sensor[i].warmup <= 0)
+				innovate_o2_sensor[i].warmup = 0;
+			}	
+			break;
+			//  case 5: // Heater Calibration, Lambda value contains calibration countdown
+			//    break;
+		case 6: // Error code in Lambda value
+			InnovateLC2AFR = AFR_ERROR;
+			innovate_o2_sensor[i].error_code = (sensor_error_code_t)((ser_buffer[4 + i * 4] << 7 | ser_buffer[5 + i * 4]) & 0x1FFF);
+			//catch potential overflow:
+			if (innovate_o2_sensor[i].error_code >= (sensor_error_code_t)1023) {
+				innovate_o2_sensor[i].error_code = (sensor_error_code_t)1023;
+			} else if (innovate_o2_sensor[i].error_code <= 0) {
+				innovate_o2_sensor[i].error_code = (sensor_error_code_t)0;
+			}
+			break;
+			//  case 7: // reserved
+			//    break;
+		default:
+			InnovateLC2AFR = AFR_ERROR;
+			break;
+		}
+	}
+}
+
+void ResetSerialSensor() {
+	ClearSerialBuffer();
+	ParseSerialData();
+}
+
+void ClearSerialBuffer() {
+	memset(ser_buffer, 0, sizeof(ser_buffer));
+}
+
+void ParseSerialData()  {
+	if (CONFIG(enableInnovateLC2))
+		IdentifyInnovateSerialMsg();
+}
+
+#endif
diff --git a/firmware/controllers/serial/serial_sensor.h b/firmware/controllers/serial/serial_sensor.h
new file mode 100644
index 0000000000..834c705211
--- /dev/null
+++ b/firmware/controllers/serial/serial_sensor.h
@@ -0,0 +1,20 @@
+/**
+ * @file	serial_sensor.h
+ *
+ *
+ * @date Mar 19, 2020
+ * @author Konstantin Smola, (c) 2020
+ */
+
+#pragma once
+
+#define AFRMIN 0
+#define AFRMAX 33
+
+#define AFR_ERROR 30
+
+void IdentifyInnovateSerialMsg();
+void ParseInnovateSerialMsg();
+void ParseSerialData();
+void ResetSerialSensor();
+void ClearSerialBuffer();
\ No newline at end of file
diff --git a/firmware/controllers/settings.cpp b/firmware/controllers/settings.cpp
index 0659397e71..c89ecf4e2d 100644
--- a/firmware/controllers/settings.cpp
+++ b/firmware/controllers/settings.cpp
@@ -694,6 +694,14 @@ static void setCanTxPin(const char *pinName) {
 	setIndividualPin(pinName, &engineConfiguration->canTxPin, "CAN TX");
 }
 
+static void setAuxRxpin(const char *pinName) {
+	setIndividualPin(pinName, &engineConfiguration->auxSerialRxPin, "AUX RX");
+}
+
+static void setAuxTxpin(const char *pinName) {
+	setIndividualPin(pinName, &engineConfiguration->auxSerialTxPin, "AUX TX");
+}
+
 static void setAlternatorPin(const char *pinName) {
 	setIndividualPin(pinName, &engineConfiguration->alternatorControlPin, "alternator");
 }
@@ -1444,6 +1452,9 @@ void initSettings(void) {
 	addConsoleActionS("set_can_rx_pin", setCanRxPin);
 	addConsoleActionS("set_can_tx_pin", setCanTxPin);
 
+	addConsoleActionS("set_aux_tx_pin", setAuxTxpin);
+	addConsoleActionS("set_aux_rx_pin", setAuxRxpin);
+
 #if HAL_USE_ADC
 	addConsoleActionSS("set_analog_input_pin", setAnalogInputPin);
 #endif
diff --git a/firmware/hw_layer/drivers/drivers.mk b/firmware/hw_layer/drivers/drivers.mk
index 19d4b8235e..43a70869d1 100644
--- a/firmware/hw_layer/drivers/drivers.mk
+++ b/firmware/hw_layer/drivers/drivers.mk
@@ -4,6 +4,7 @@ HW_LAYER_DRIVERS_INC = \
 	$(DRIVERS_DIR) \
 	$(DRIVERS_DIR)/gpio \
 	$(DRIVERS_DIR)/can \
+	$(DRIVERS_DIR)/serial \
 
 HW_LAYER_DRIVERS_CORE = \
 	$(DRIVERS_DIR)/gpio/core.c \
@@ -17,4 +18,4 @@ HW_LAYER_DRIVERS = \
 HW_LAYER_DRIVERS_CPP = \
 	$(DRIVERS_DIR)/can/can_hw.cpp \
 	$(DRIVERS_DIR)/can/can_msg_tx.cpp \
-
+	$(DRIVERS_DIR)/serial/serial_hw.cpp \
\ No newline at end of file
diff --git a/firmware/hw_layer/drivers/serial/serial_hw.cpp b/firmware/hw_layer/drivers/serial/serial_hw.cpp
new file mode 100644
index 0000000000..f61d1fbfa2
--- /dev/null
+++ b/firmware/hw_layer/drivers/serial/serial_hw.cpp
@@ -0,0 +1,93 @@
+/**
+ * @file	serial_hw.cpp
+ * @brief	SERIAL bus low level code
+ *
+ * @date Apr 17, 2020
+ * @author Konstantin Smola, (c) 2020
+ */
+
+#include "global.h"
+
+#if EFI_AUX_SERIAL
+
+#include "serial.h"
+#include "engine_configuration.h"
+#include "pin_repository.h"
+#include "serial_hw.h"
+#include "string.h"
+#include "mpu_util.h"
+#include "engine.h"
+
+EXTERN_ENGINE;
+
+static bool isSerialEnabled = false;
+static bool isSerialTXEnabled = false;
+static bool isSerialRXEnabled = false;
+static LoggingWithStorage logger("SERIAL driver");
+
+static SerialConfig uartCfg;
+static SerialRead serialRead;
+
+static void auxInfo(void) {
+	if (!isSerialEnabled) {
+		scheduleMsg(&logger, "AUX Serial is not enabled, please enable & restart");
+		return;
+	}
+
+	scheduleMsg(&logger, "AUX Serial TX %s", hwPortname(CONFIG(auxSerialTxPin)));
+	scheduleMsg(&logger, "AUX Serial RX %s", hwPortname(CONFIG(auxSerialRxPin)));
+}
+
+void enableAuxSerial(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
+	engineConfiguration->auxSerialTxPin = CONFIG(auxSerialTxPin);
+	engineConfiguration->auxSerialRxPin = CONFIG(auxSerialRxPin);
+	engineConfiguration->auxSerialSpeed = CONFIG(auxSerialSpeed);
+	
+	uartCfg.speed = engineConfiguration->auxSerialSpeed;
+	sdStart(AUX_SERIAL_DEVICE, &uartCfg);
+
+	scheduleMsg(&logger, "AUX Serial started");
+}
+
+void stopAuxSerialPins(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
+	brain_pin_markUnused(activeConfiguration.auxSerialTxPin);
+	brain_pin_markUnused(activeConfiguration.auxSerialRxPin);
+}
+
+void startAuxSerialPins(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
+	if (CONFIG(auxSerialTxPin))
+		efiSetPadMode("AuxSerial TX", CONFIG(auxSerialTxPin), PAL_MODE_ALTERNATE(8));
+	if (CONFIG(auxSerialRxPin))
+		efiSetPadMode("AuxSerial RX", CONFIG(auxSerialRxPin), PAL_MODE_ALTERNATE(8));
+
+	enableAuxSerial();
+}
+
+void initAuxSerial(void) {
+	addConsoleAction("auxinfo", auxInfo);
+
+	isSerialEnabled =
+		(CONFIG(auxSerialTxPin)) || // we need at least one pin set
+		(CONFIG(auxSerialRxPin));
+
+	isSerialRXEnabled = CONFIG(auxSerialRxPin);
+	isSerialTXEnabled = CONFIG(auxSerialTxPin);
+
+	// exit if no pin is configured
+	if (!isSerialEnabled)
+		return;
+
+	// Validate pins 
+	if (isSerialTXEnabled && !isValidSerialTxPin(CONFIG(auxSerialTxPin)))
+		return;
+
+	if (isSerialRXEnabled && !isValidSerialRxPin(CONFIG(auxSerialRxPin)))
+		return;
+
+	startAuxSerialPins();
+
+	if (isSerialRXEnabled)
+		serialRead.Start();
+}
+
+#endif // EFI_AUX_SERIAL
\ No newline at end of file
diff --git a/firmware/hw_layer/drivers/serial/serial_hw.h b/firmware/hw_layer/drivers/serial/serial_hw.h
new file mode 100644
index 0000000000..f6499d438f
--- /dev/null
+++ b/firmware/hw_layer/drivers/serial/serial_hw.h
@@ -0,0 +1,21 @@
+/**
+ * @file	serial_hw.h
+ * @brief	SERIAL bus low level code
+ *
+ * @date Apr 17, 2020
+ * @author Konstantin Smola, (c) 2020
+ */
+
+#pragma once
+
+#include "efifeatures.h"
+#if EFI_TUNER_STUDIO
+#include "tunerstudio_configuration.h"
+#endif /* EFI_TUNER_STUDIO */
+
+void initAuxSerial(void);
+#if EFI_AUX_SERIAL
+void stopAuxSerialPins(DECLARE_ENGINE_PARAMETER_SIGNATURE);
+void startAuxSerialPins(DECLARE_ENGINE_PARAMETER_SIGNATURE);
+void enableAuxSerial(DECLARE_ENGINE_PARAMETER_SIGNATURE);
+#endif //EFI_AUX_SERIAL
\ No newline at end of file
diff --git a/firmware/hw_layer/hardware.cpp b/firmware/hw_layer/hardware.cpp
index cbef286ff2..31b29b4bf6 100644
--- a/firmware/hw_layer/hardware.cpp
+++ b/firmware/hw_layer/hardware.cpp
@@ -28,6 +28,7 @@
 #include "eficonsole.h"
 #include "console_io.h"
 #include "sensor_chart.h"
+#include "serial_hw.h"
 
 #include "mpu_util.h"
 //#include "usb_msd.h"
@@ -289,6 +290,10 @@ void applyNewHardwareSettings(void) {
 	stopCanPins();
 #endif /* EFI_CAN_SUPPORT */
 
+#if EFI_AUX_SERIAL
+	stopAuxSerialPins();
+#endif /* EFI_AUX_SERIAL */
+
 #if EFI_HIP_9011
 	stopHip9001_pins();
 #endif /* EFI_HIP_9011 */
@@ -364,6 +369,10 @@ void applyNewHardwareSettings(void) {
 	startCanPins();
 #endif /* EFI_CAN_SUPPORT */
 
+#if EFI_AUX_SERIAL
+	startAuxSerialPins();
+#endif /* EFI_AUX_SERIAL */
+
 #if EFI_HIP_9011
 	startHip9001_pins();
 #endif /* EFI_HIP_9011 */
@@ -559,6 +568,9 @@ void initHardware(Logging *l) {
 	addConsoleActionII("i2c", sendI2Cbyte);
 #endif
 
+#if EFI_AUX_SERIAL
+	initAuxSerial();
+#endif /* EFI_AUX_SERIAL */
 
 //	USBMassStorageDriver UMSD1;
 
diff --git a/firmware/hw_layer/ports/mpu_util.h b/firmware/hw_layer/ports/mpu_util.h
index 82302b972a..6045fa46b8 100644
--- a/firmware/hw_layer/ports/mpu_util.h
+++ b/firmware/hw_layer/ports/mpu_util.h
@@ -15,6 +15,9 @@ bool isValidCanRxPin(brain_pin_e pin);
 CANDriver * detectCanDevice(brain_pin_e pinRx, brain_pin_e pinTx);
 #endif // HAL_USE_CAN
 
+bool isValidSerialTxPin(brain_pin_e pin);
+bool isValidSerialRxPin(brain_pin_e pin);
+
 // SPI
 #if HAL_USE_SPI
 void initSpiModule(SPIDriver *driver, brain_pin_e sck, brain_pin_e miso,
diff --git a/firmware/hw_layer/ports/stm32/stm32_common.cpp b/firmware/hw_layer/ports/stm32/stm32_common.cpp
index 15aba2c2c0..8ddadae2bc 100644
--- a/firmware/hw_layer/ports/stm32/stm32_common.cpp
+++ b/firmware/hw_layer/ports/stm32/stm32_common.cpp
@@ -145,3 +145,23 @@ void jump_to_bootloader() {
 	NVIC_SystemReset();
 }
 #endif /* EFI_PROD_CODE */
+
+#if EFI_AUX_SERIAL
+
+static bool isValidUART6TxPin(brain_pin_e pin) {
+	return pin == GPIOC_6 || pin == GPIOG_14;
+}
+
+static bool isValidUART6RxPin(brain_pin_e pin) {
+	return pin == GPIOC_7 || pin == GPIOG_9;
+}
+
+bool isValidSerialTxPin(brain_pin_e pin) {
+   return isValidUART6TxPin(pin);
+}
+
+bool isValidSerialRxPin(brain_pin_e pin) {
+   return isValidUART6RxPin(pin);
+}
+
+#endif /*EFI_AUX_SERIAL*/
\ No newline at end of file