diff --git a/firmware/ChibiOS3 b/firmware/ChibiOS3
index fa141e2703..5746069508 160000
--- a/firmware/ChibiOS3
+++ b/firmware/ChibiOS3
@@ -1 +1 @@
-Subproject commit fa141e270361bc75da809abe3c6d44c4dc22c46b
+Subproject commit 5746069508d98a2ac94a2e0d9bdc46a532f46edf
diff --git a/firmware/config/stm32f4ems/efifeatures.h b/firmware/config/stm32f4ems/efifeatures.h
index 59af3a0736..c8c73f47cc 100644
--- a/firmware/config/stm32f4ems/efifeatures.h
+++ b/firmware/config/stm32f4ems/efifeatures.h
@@ -243,8 +243,16 @@
 #define EFI_CONSOLE_UART_DEVICE (&SD3)
 #endif
 
-#ifndef TS_SERIAL_UART_DEVICE
+// Use 'UART' DMA-mode driver instead of 'SERIAL'
+#define TS_UART_DMA_MODE FALSE
+
+#define TS_DMA_UART_DEVICE (&UARTD3)
 #define TS_SERIAL_UART_DEVICE (&SD3)
+
+// todo: add DMA-mode for Console & GPS?
+#if TS_UART_DMA_MODE
+#define EFI_UART_GPS FALSE
+#undef EFI_CONSOLE_UART_DEVICE
 #endif
 
 // todo: start using consoleSerialTxPin? Not sure
diff --git a/firmware/config/stm32f4ems/halconf.h b/firmware/config/stm32f4ems/halconf.h
index 5cd540aff1..28faec0877 100644
--- a/firmware/config/stm32f4ems/halconf.h
+++ b/firmware/config/stm32f4ems/halconf.h
@@ -132,8 +132,13 @@
  * @brief   Enables the SERIAL subsystem.
  */
 #if !defined(HAL_USE_SERIAL) || defined(__DOXYGEN__)
+/* Configured in efifeatures.h */
+#if TS_UART_DMA_MODE
+#define HAL_USE_SERIAL              FALSE
+#else
 #define HAL_USE_SERIAL              TRUE
 #endif
+#endif
 
 /**
  * @brief   Enables the SERIAL over USB subsystem.
@@ -153,8 +158,13 @@
  * @brief   Enables the UART subsystem.
  */
 #if !defined(HAL_USE_UART) || defined(__DOXYGEN__)
+/* Configured in efifeatures.h */
+#if TS_UART_DMA_MODE
+#define HAL_USE_UART                TRUE
+#else
 #define HAL_USE_UART                FALSE
 #endif
+#endif
 
 /**
  * @brief   Enables the USB subsystem.
@@ -353,8 +363,13 @@
  * @note    Disabling this option saves both code and data space.
  */
 #if !defined(UART_USE_WAIT) || defined(__DOXYGEN__)
+/* Configured in efifeatures.h */
+#if TS_UART_DMA_MODE
+#define UART_USE_WAIT               TRUE
+#else
 #define UART_USE_WAIT               FALSE
 #endif
+#endif
 
 /**
  * @brief   Enables the @p uartAcquireBus() and @p uartReleaseBus() APIs.
diff --git a/firmware/config/stm32f4ems/mcuconf.h b/firmware/config/stm32f4ems/mcuconf.h
index e4f536176f..47d49e6511 100644
--- a/firmware/config/stm32f4ems/mcuconf.h
+++ b/firmware/config/stm32f4ems/mcuconf.h
@@ -34,6 +34,11 @@
  */
 #define ICU_PRIORITY 3
 
+/**
+ * UART DMA-mode byte capture (low latency)
+ */
+#define UART_DMA_IRQ_PRIORITY (PRECISE_SCHEDULING_TIMER_PRIORITY + 2)
+
 /*
  * SysTick driver system settings.
  */
@@ -332,12 +337,12 @@
 #define STM32_UART_UART5_TX_DMA_STREAM      STM32_DMA_STREAM_ID(1, 7)
 #define STM32_UART_USART6_RX_DMA_STREAM     STM32_DMA_STREAM_ID(2, 2)
 #define STM32_UART_USART6_TX_DMA_STREAM     STM32_DMA_STREAM_ID(2, 7)
-#define STM32_UART_USART1_IRQ_PRIORITY      12
-#define STM32_UART_USART2_IRQ_PRIORITY      12
-#define STM32_UART_USART3_IRQ_PRIORITY      12
-#define STM32_UART_UART4_IRQ_PRIORITY       12
-#define STM32_UART_UART5_IRQ_PRIORITY       12
-#define STM32_UART_USART6_IRQ_PRIORITY      12
+#define STM32_UART_USART1_IRQ_PRIORITY      UART_DMA_IRQ_PRIORITY
+#define STM32_UART_USART2_IRQ_PRIORITY      UART_DMA_IRQ_PRIORITY
+#define STM32_UART_USART3_IRQ_PRIORITY      UART_DMA_IRQ_PRIORITY
+#define STM32_UART_UART4_IRQ_PRIORITY       UART_DMA_IRQ_PRIORITY
+#define STM32_UART_UART5_IRQ_PRIORITY       UART_DMA_IRQ_PRIORITY
+#define STM32_UART_USART6_IRQ_PRIORITY      UART_DMA_IRQ_PRIORITY
 #define STM32_UART_USART1_DMA_PRIORITY      0
 #define STM32_UART_USART2_DMA_PRIORITY      0
 #define STM32_UART_USART3_DMA_PRIORITY      0
diff --git a/firmware/console/binary/tunerstudio.cpp b/firmware/console/binary/tunerstudio.cpp
index 83c538e1ae..6c4b2dda03 100644
--- a/firmware/console/binary/tunerstudio.cpp
+++ b/firmware/console/binary/tunerstudio.cpp
@@ -110,21 +110,7 @@ extern persistent_config_container_s persistentState;
 
 static efitimems_t previousWriteReportMs = 0;
 
-ts_channel_s tsChannel;
-
-static int ts_serial_ready(bool isConsoleRedirect) {
-#if EFI_PROD_CODE || defined(__DOXYGEN__)
-	if (isCommandLineConsoleOverTTL() ^ isConsoleRedirect) {
-		// TS uses USB when console uses serial
-		return is_usb_serial_ready();
-	} else {
-		// TS uses serial when console uses USB
-		return true;
-	}
-#else
-	return true;
-#endif
-}
+static ts_channel_s tsChannel;
 
 static uint16_t BINARY_RESPONSE = (uint16_t) SWAP_UINT16(BINARY_SWITCH_TAG);
 
@@ -240,6 +226,7 @@ void handlePageSelectCommand(ts_channel_s *tsChannel, ts_response_format_e mode,
 }
 
 static void onlineTuneBytes(int currentPageId, uint32_t offset, int count) {
+	UNUSED(currentPageId);
 	if (offset > sizeof(engine_configuration_s)) {
 		int maxSize = sizeof(persistent_config_s) - offset;
 		if (count > maxSize) {
@@ -313,6 +300,8 @@ void handleCrc32Check(ts_channel_s *tsChannel, ts_response_format_e mode, uint16
  */
 void handleWriteValueCommand(ts_channel_s *tsChannel, ts_response_format_e mode, uint16_t page, uint16_t offset,
 		uint8_t value) {
+	UNUSED(tsChannel);
+	UNUSED(mode);
 	tsState.writeValueCommandCounter++;
 
 	currentPageId = page;
@@ -439,7 +428,7 @@ void runBinaryProtocolLoop(ts_channel_s *tsChannel, bool isConsoleRedirect) {
 	bool isFirstByte = true;
 
 	while (true) {
-		int isReady = ts_serial_ready(isConsoleRedirect);
+		int isReady = sr5IsReady(isConsoleRedirect);
 		if (!isReady) {
 			chThdSleepMilliseconds(10);
 			wasReady = false;
@@ -562,9 +551,7 @@ static THD_FUNCTION(tsThreadEntryPoint, arg) {
 	(void) arg;
 	chRegSetThreadName("tunerstudio thread");
 
-#if EFI_PROD_CODE || defined(__DOXYGEN__)
-	startTsPort();
-#endif
+	startTsPort(&tsChannel);
 
 	runBinaryProtocolLoop(&tsChannel, false);
 }
@@ -824,8 +811,6 @@ void startTunerStudioConnectivity(void) {
 	addConsoleAction("reset_ts", resetTs);
 	addConsoleActionI("set_ts_speed", setTsSpeed);
 
-	tsChannel.channel = getTsSerialDevice();
-
 	chThdCreateStatic(tsThreadStack, sizeof(tsThreadStack), NORMALPRIO, (tfunc_t)tsThreadEntryPoint, NULL);
 }
 
diff --git a/firmware/console/binary/tunerstudio_io.cpp b/firmware/console/binary/tunerstudio_io.cpp
index d921e184f9..24fecad75c 100644
--- a/firmware/console/binary/tunerstudio_io.cpp
+++ b/firmware/console/binary/tunerstudio_io.cpp
@@ -24,14 +24,61 @@ extern LoggingWithStorage tsLogger;
 
 #if HAL_USE_SERIAL_USB || defined(__DOXYGEN__)
 extern SerialUSBDriver SDU1;
-#define CONSOLE_DEVICE &SDU1
-#else
-#define CONSOLE_DEVICE TS_SERIAL_UART_DEVICE
+#define CONSOLE_USB_DEVICE &SDU1
 #endif
 
-static SerialConfig tsSerialConfig = { 0, 0, USART_CR2_STOP1_BITS | USART_CR2_LINEN, 0 };
+#if TS_UART_DMA_MODE
+// Async. FIFO buffer takes some RAM...
+static uart_dma_s tsUartDma;
 
-void startTsPort(void) {
+/* Common function for all DMA-UART IRQ handlers. */
+static void tsCopyDataFromDMA() {
+	chSysLockFromISR();
+	// get 0-based DMA buffer position
+	int dmaPos = TS_DMA_BUFFER_SIZE - dmaStreamGetTransactionSize(TS_DMA_UART_DEVICE->dmarx);
+	// if the position is wrapped (circular DMA-mode enabled)
+	if (dmaPos < tsUartDma.readPos)
+		dmaPos += TS_DMA_BUFFER_SIZE;
+	// we need to update the current readPos
+	int newReadPos = tsUartDma.readPos;
+	for (int i = newReadPos; i < dmaPos; ) {
+		if (chIQPutI(&tsUartDma.fifoRxQueue, tsUartDma.dmaBuffer[newReadPos]) != Q_OK) {
+			break; // todo: ignore overflow?
+		}
+		// the read position should always stay inside the buffer range
+		newReadPos = (++i) & (TS_DMA_BUFFER_SIZE - 1);
+	}
+	tsUartDma.readPos = newReadPos;
+	chSysUnlockFromISR();
+}
+
+/* We use the same handler code for both halves. */
+static void tsRxIRQHalfHandler(UARTDriver *uartp, uartflags_t full) {
+	UNUSED(uartp);
+	UNUSED(full);
+	tsCopyDataFromDMA();
+}
+
+/* This handler is called right after the UART receiver has finished its work. */
+static void tsRxIRQIdleHandler(UARTDriver *uartp) {
+	UNUSED(uartp);
+	tsCopyDataFromDMA();
+}
+
+/* Note: This structure is modified from the default ChibiOS layout! */
+static UARTConfig tsDmaUartConfig = { 
+	NULL, NULL, NULL, NULL, NULL, 
+	0, 0, 0/*USART_CR2_STOP1_BITS*/ | USART_CR2_LINEN, 0,
+	/*timeout_cb*/tsRxIRQIdleHandler, /*rxhalf_cb*/tsRxIRQHalfHandler
+};
+#else
+static SerialConfig tsSerialConfig = { 0, 0, USART_CR2_STOP1_BITS | USART_CR2_LINEN, 0 };
+#endif /* TS_UART_DMA_MODE */
+#endif /* EFI_PROD_CODE */
+
+
+void startTsPort(ts_channel_s *tsChannel) {
+#if EFI_PROD_CODE || defined(__DOXYGEN__)
 #if EFI_USB_SERIAL || defined(__DOXYGEN__)
 	if (isCommandLineConsoleOverTTL()) {
 		print("TunerStudio over USB serial");
@@ -39,6 +86,8 @@ void startTsPort(void) {
 		 * This method contains a long delay, that's the reason why this is not done on the main thread
 		 */
 		usb_serial_start();
+		// if console uses UART then TS uses USB
+		tsChannel->channel = (BaseChannel *) CONSOLE_USB_DEVICE;
 	} else
 #endif
 	{
@@ -48,29 +97,32 @@ void startTsPort(void) {
 			efiSetPadMode("tunerstudio rx", engineConfiguration->binarySerialRxPin, PAL_MODE_ALTERNATE(TS_SERIAL_AF));
 			efiSetPadMode("tunerstudio tx", engineConfiguration->binarySerialTxPin, PAL_MODE_ALTERNATE(TS_SERIAL_AF));
 
+#if TS_UART_DMA_MODE
+			print("Using UART-DMA mode");
+			// init FIFO queue
+			chIQObjectInit(&tsUartDma.fifoRxQueue, tsUartDma.buffer, sizeof(tsUartDma.buffer), NULL, NULL);
+			
+			// start DMA driver
+			tsDmaUartConfig.speed = boardConfiguration->tunerStudioSerialSpeed;
+			uartStart(TS_DMA_UART_DEVICE, &tsDmaUartConfig);
+
+			// start continuous DMA transfer using our circular buffer
+			tsUartDma.readPos = 0;
+			uartStartReceive(TS_DMA_UART_DEVICE, sizeof(tsUartDma.dmaBuffer), tsUartDma.dmaBuffer);
+#else
+			print("Using Serial mode");
 			tsSerialConfig.speed = boardConfiguration->tunerStudioSerialSpeed;
 
 			sdStart(TS_SERIAL_UART_DEVICE, &tsSerialConfig);
-		}
+			
+			tsChannel->channel = (BaseChannel *) TS_SERIAL_UART_DEVICE;
+#endif /* TS_UART_DMA_MODE */
+		} else
+			tsChannel->channel = (BaseChannel *) NULL;	// actually not used
 	}
-}
-
+#else  /* EFI_PROD_CODE */
+	tsChannel->channel = (BaseChannel *) TS_SIMULATOR_PORT;
 #endif /* EFI_PROD_CODE */
-
-BaseChannel * getTsSerialDevice(void) {
-#if EFI_PROD_CODE || defined(__DOXYGEN__)
-#if EFI_USB_SERIAL || defined(__DOXYGEN__)
-	if (isCommandLineConsoleOverTTL()) {
-		// if console uses UART then TS uses USB
-		return (BaseChannel *) CONSOLE_DEVICE;
-	} else
-#endif
-	{
-		return (BaseChannel *) TS_SERIAL_UART_DEVICE;
-	}
-#else
-	return (BaseChannel *) TS_SIMULATOR_PORT;
-#endif
 }
 
 void sr5WriteData(ts_channel_s *tsChannel, const uint8_t * buffer, int size) {
@@ -78,7 +130,17 @@ void sr5WriteData(ts_channel_s *tsChannel, const uint8_t * buffer, int size) {
 #if EFI_SIMULATOR || defined(__DOXYGEN__)
 			logMsg("chSequentialStreamWrite [%d]\r\n", size);
 #endif
+
+#if TS_UART_DMA_MODE && EFI_PROD_CODE
+	UNUSED(tsChannel);
+	int transferred = size;
+	uartSendTimeout(TS_DMA_UART_DEVICE, (size_t *)&transferred, buffer, BINARY_IO_TIMEOUT);
+#else
+	if (tsChannel->channel == NULL)
+		return;
 	int transferred = chnWriteTimeout(tsChannel->channel, buffer, size, BINARY_IO_TIMEOUT);
+#endif
+
 #if EFI_SIMULATOR || defined(__DOXYGEN__)
 			logMsg("transferred [%d]\r\n", transferred);
 #endif
@@ -90,6 +152,18 @@ void sr5WriteData(ts_channel_s *tsChannel, const uint8_t * buffer, int size) {
 	}
 }
 
+int sr5ReadData(ts_channel_s *tsChannel, const uint8_t * buffer, int size) {
+#if TS_UART_DMA_MODE && EFI_PROD_CODE
+	UNUSED(tsChannel);
+	return (int)chIQReadTimeout(&tsUartDma.fifoRxQueue, (uint8_t * )buffer, (size_t)size, SR5_READ_TIMEOUT);
+#else
+	if (tsChannel->channel == NULL)
+		return 0;
+	return chnReadTimeout(tsChannel->channel, (uint8_t * )buffer, size, SR5_READ_TIMEOUT);
+#endif
+}
+
+
 /**
  * Adds size to the beginning of a packet and a crc32 at the end. Then send the packet.
  */
@@ -122,7 +196,17 @@ void sr5SendResponse(ts_channel_s *tsChannel, ts_response_format_e mode, const u
 	}
 }
 
-int sr5ReadData(ts_channel_s *tsChannel, uint8_t * buffer, int size) {
-	return chnReadTimeout(tsChannel->channel, buffer, size, SR5_READ_TIMEOUT);
+bool sr5IsReady(bool isConsoleRedirect) {
+#if EFI_PROD_CODE || defined(__DOXYGEN__)
+	if (isCommandLineConsoleOverTTL() ^ isConsoleRedirect) {
+		// TS uses USB when console uses serial
+		return is_usb_serial_ready();
+	} else {
+		// TS uses serial when console uses USB
+		return true;
+	}
+#else
+	return true;
+#endif
 }
 
diff --git a/firmware/console/binary/tunerstudio_io.h b/firmware/console/binary/tunerstudio_io.h
index 2b95dc9a04..6588415017 100644
--- a/firmware/console/binary/tunerstudio_io.h
+++ b/firmware/console/binary/tunerstudio_io.h
@@ -39,7 +39,7 @@ typedef enum {
 
 typedef struct {
 	BaseChannel * channel;
-	uint8_t writeBuffer[4];
+	uint8_t writeBuffer[7];	// size(2 bytes) + response(1 byte) + crc32 (4 bytes)
 	/**
 	 * we use 'blockingFactor = 320' in rusefi.ini
 	 * todo: should we just do (320 + CRC_WRAPPING_SIZE) ?
@@ -47,6 +47,23 @@ typedef struct {
 	char crcReadBuffer[BLOCKING_FACTOR + 30];
 } ts_channel_s;
 
+// See uart_dma_s
+#define TS_FIFO_BUFFER_SIZE (BLOCKING_FACTOR + 30)
+// This must be a power of 2!
+#define TS_DMA_BUFFER_SIZE 32
+
+// struct needed for async DMA transfer mode (see TS_UART_DMA_MODE)
+typedef struct {
+	// circular DMA buffer
+	uint8_t dmaBuffer[TS_DMA_BUFFER_SIZE];
+	// current read position for the DMA buffer
+	volatile int readPos;
+	// secondary FIFO buffer for async. transfer
+	uint8_t buffer[TS_FIFO_BUFFER_SIZE];
+	// input FIFO Rx queue
+	input_queue_t fifoRxQueue;
+} uart_dma_s;
+
 #define TS_HELLO_COMMAND_DEPRECATED 'H' // 0x48
 #define TS_HELLO_COMMAND 'S' // 0x53
 #define TS_TEST_COMMAND 't' // 0x74
@@ -71,18 +88,19 @@ typedef struct {
 // todo: double-check this
 #define CRC_WRAPPING_SIZE (CRC_VALUE_SIZE + 3)
 
-BaseChannel * getTsSerialDevice(void);
-void startTsPort(void);
 
-// that's 3 seconds
-#define BINARY_IO_TIMEOUT MS2ST(3000)
+void startTsPort(ts_channel_s *tsChannel);
 
-// that's 3 seconds
-#define SR5_READ_TIMEOUT MS2ST(3000)
+// that's 1 second
+#define BINARY_IO_TIMEOUT MS2ST(1000)
+
+// that's 1 second
+#define SR5_READ_TIMEOUT MS2ST(1000)
 
 void sr5WriteData(ts_channel_s *tsChannel, const uint8_t * buffer, int size);
 void sr5WriteCrcPacket(ts_channel_s *tsChannel, const uint8_t responseCode, const void *buf, const uint16_t size);
 void sr5SendResponse(ts_channel_s *tsChannel, ts_response_format_e mode, const uint8_t * buffer, int size);
 int sr5ReadData(ts_channel_s *tsChannel, uint8_t * buffer, int size);
+bool sr55IsReady(bool isConsoleRedirect);
 
 #endif /* CONSOLE_TUNERSTUDIO_TUNERSTUDIO_IO_H_ */
diff --git a/firmware/console/console_io.cpp b/firmware/console/console_io.cpp
index e3f7d9d71d..62958600c2 100644
--- a/firmware/console/console_io.cpp
+++ b/firmware/console/console_io.cpp
@@ -72,6 +72,7 @@ static bool getConsoleLine(BaseSequentialStream *chp, char *line, unsigned size)
 		short c = (short) chSequentialStreamGet(chp);
 		onDataArrived();
 
+#if defined(EFI_CONSOLE_UART_DEVICE) || defined(__DOXYGEN__)
 		if (isCommandLineConsoleOverTTL()) {
 			uint32_t flags;
 			chSysLock()
@@ -80,12 +81,11 @@ static bool getConsoleLine(BaseSequentialStream *chp, char *line, unsigned size)
 			flags = chEvtGetAndClearFlagsI(&consoleEventListener);
 			chSysUnlock()
 			;
-
 			if (flags & SD_OVERRUN_ERROR) {
 //				firmwareError(OBD_PCM_Processor_Fault, "serial overrun");
 			}
-
 		}
+#endif
 
 #if EFI_UART_ECHO_TEST_MODE
 		/**
@@ -176,15 +176,15 @@ void runConsoleLoop(ts_channel_s *console) {
 #if EFI_PROD_CODE || EFI_EGT || defined(__DOXYGEN__)
 
 
-SerialDriver * getConsoleChannel(void) {
+BaseChannel * getConsoleChannel(void) {
 #if defined(EFI_CONSOLE_UART_DEVICE) || defined(__DOXYGEN__)
 	if (isCommandLineConsoleOverTTL()) {
-		return (SerialDriver *) EFI_CONSOLE_UART_DEVICE;
+		return (BaseChannel *) EFI_CONSOLE_UART_DEVICE;
 	}
 #endif /* EFI_CONSOLE_UART_DEVICE */
 
 #if HAL_USE_SERIAL_USB || defined(__DOXYGEN__)
-	return (SerialDriver *) &SDU1;
+	return (BaseChannel *) &SDU1;
 #else
 	return NULL;
 #endif /* HAL_USE_SERIAL_USB */
@@ -217,8 +217,8 @@ static THD_FUNCTION(consoleThreadThreadEntryPoint, arg) {
 
 
 	binaryConsole.channel = (BaseChannel *) getConsoleChannel();
-	runConsoleLoop(&binaryConsole);
-
+	if (binaryConsole.channel != NULL)
+		runConsoleLoop(&binaryConsole);
 }
 
 // 10 seconds
diff --git a/firmware/console/console_io.h b/firmware/console/console_io.h
index d0da3e9efa..d3ddb30c57 100644
--- a/firmware/console/console_io.h
+++ b/firmware/console/console_io.h
@@ -29,7 +29,7 @@ typedef void (*CommandHandler)(char *);
 #define GET_CONSOLE_MODE_VALUE() palReadPad(CONSOLE_MODE_SWITCH_PORT, CONSOLE_MODE_SWITCH_PIN)
 #define SHOULD_INGORE_FLASH() (palReadPad(CONFIG_RESET_SWITCH_PORT, CONFIG_RESET_SWITCH_PIN) == 0)
 
-SerialDriver * getConsoleChannel(void);
+BaseChannel * getConsoleChannel(void);
 
 void consolePutChar(int x);
 void consoleOutputBuffer(const uint8_t *buf, int size);