diff --git a/radio/src/datastructs.h b/radio/src/datastructs.h
index 413c5efcd..a0571ac61 100644
--- a/radio/src/datastructs.h
+++ b/radio/src/datastructs.h
@@ -666,7 +666,8 @@ PACK(struct TrainerData {
 
 #if defined(PCBHORUS)
   #define EXTRA_GENERAL_FIELDS \
-    NOBACKUP(uint8_t auxSerialMode); \
+    NOBACKUP(uint8_t auxSerialMode:4); \
+    NOBACKUP(uint8_t aux2SerialMode:4); \
     swconfig_t switchConfig; \
     uint16_t potsConfig; /* two bits per pot */ \
     uint8_t slidersConfig; /* 1 bit per slider */ \
diff --git a/radio/src/debug.h b/radio/src/debug.h
index 2ed2f209b..e73c73f29 100644
--- a/radio/src/debug.h
+++ b/radio/src/debug.h
@@ -38,6 +38,7 @@ extern "C" {
 #endif
 
 uint8_t auxSerialTracesEnabled();
+uint8_t aux2SerialTracesEnabled();
 
 #if defined(SIMU)
   typedef void (*traceCallbackFunc)(const char * text);
diff --git a/radio/src/gui/480x272/radio_hardware.cpp b/radio/src/gui/480x272/radio_hardware.cpp
index 37f81bed3..3ba908ad9 100644
--- a/radio/src/gui/480x272/radio_hardware.cpp
+++ b/radio/src/gui/480x272/radio_hardware.cpp
@@ -70,7 +70,9 @@ enum MenuRadioHardwareItems {
 #if defined(AUX_SERIAL)
   ITEM_RADIO_HARDWARE_AUX_SERIAL_MODE,
 #endif
-
+#if defined(AUX2_SERIAL)
+  ITEM_RADIO_HARDWARE_AUX2_SERIAL_MODE,
+#endif
   ITEM_RADIO_HARDWARE_JITTER_FILTER,
   ITEM_RADIO_HARDWARE_RAS,
 
@@ -89,6 +91,11 @@ enum MenuRadioHardwareItems {
 #else
   #define AUX_SERIAL_ROW
 #endif
+#if defined(AUX2_SERIAL)
+#define AUX2_SERIAL_ROW                0,
+#else
+#define AUX2_SERIAL_ROW
+#endif
 
 #define POTS_ROWS                      NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1
 #define SWITCHES_ROWS                  NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1, NAVIGATION_LINE_BY_LINE|1
@@ -159,6 +166,7 @@ bool menuRadioHardware(event_t event)
     EXTERNAL_ANTENNA_ROW
 
     AUX_SERIAL_ROW /* aux serial mode */
+    AUX2_SERIAL_ROW /* aux2 serial mode */
     0, /* ADC filter */
     READONLY_ROW /* RAS */,
     SPORT_POWER_ROWS
@@ -371,6 +379,19 @@ bool menuRadioHardware(event_t event)
         break;
 #endif
 
+#if defined(AUX2_SERIAL)
+      case ITEM_RADIO_HARDWARE_AUX2_SERIAL_MODE:
+        lcdDrawText(MENUS_MARGIN_LEFT, y, STR_AUX2_SERIAL_MODE);
+#if defined(RADIO_TX16S)
+        lcdDrawText(lcdNextPos, y, " (TTL)");
+#endif
+        g_eeGeneral.aux2SerialMode = editChoice(HW_SETTINGS_COLUMN2, y, STR_AUX_SERIAL_MODES, g_eeGeneral.aux2SerialMode, 0, UART_MODE_MAX, attr, event);
+        if (attr && checkIncDec_Ret) {
+          aux2SerialInit(g_eeGeneral.aux2SerialMode, modelTelemetryProtocol());
+        }
+        break;
+#endif
+
       case ITEM_RADIO_HARDWARE_JITTER_FILTER:
       {
         lcdDrawText(MENUS_MARGIN_LEFT, y, STR_JITTER_FILTER);
diff --git a/radio/src/lua/api_general.cpp b/radio/src/lua/api_general.cpp
index 06b11449c..778af80c6 100644
--- a/radio/src/lua/api_general.cpp
+++ b/radio/src/lua/api_general.cpp
@@ -1601,6 +1601,13 @@ static int luaSerialWrite(lua_State * L)
     while(wr_len--) auxSerialPutc(*p++);
   }
   #endif
+#if defined(AUX2_SERIAL)
+  if (aux2SerialMode == UART_MODE_LUA) {
+    size_t wr_len = len;
+    const char* p = str;
+    while(wr_len--) aux2SerialPutc(*p++);
+  }
+#endif
 #else
   debugPrintf("luaSerialWrite: %.*s",len,str);
 #endif
diff --git a/radio/src/opentx.cpp b/radio/src/opentx.cpp
index eeb2d2ef2..9e5ced95e 100644
--- a/radio/src/opentx.cpp
+++ b/radio/src/opentx.cpp
@@ -1939,6 +1939,10 @@ void opentxInit()
   auxSerialInit(g_eeGeneral.auxSerialMode, modelTelemetryProtocol());
 #endif
 
+#if defined(AUX2_SERIAL)
+  aux2SerialInit(g_eeGeneral.aux2SerialMode, modelTelemetryProtocol());
+#endif
+
 #if MENUS_LOCK == 1
   getMovedSwitch();
   if (TRIMS_PRESSED() && g_eeGeneral.switchUnlockStates==switches_states) {
diff --git a/radio/src/serial.cpp b/radio/src/serial.cpp
index 953a865f5..c83b2fd92 100644
--- a/radio/src/serial.cpp
+++ b/radio/src/serial.cpp
@@ -34,6 +34,10 @@ void serialPutc(char c) {
   if (auxSerialTracesEnabled())
     auxSerialPutc(c);
 #endif
+#if defined(AUX2_SERIAL)
+  if (aux2SerialTracesEnabled())
+    aux2SerialPutc(c);
+#endif
 }
 
 void serialPrintf(const char * format, ...)
diff --git a/radio/src/storage/conversions/conversions_218_219.cpp b/radio/src/storage/conversions/conversions_218_219.cpp
index fe047ed80..dfca770ac 100644
--- a/radio/src/storage/conversions/conversions_218_219.cpp
+++ b/radio/src/storage/conversions/conversions_218_219.cpp
@@ -400,7 +400,7 @@ void convertRadioData_218_to_219(RadioData & settings)
 #if defined(PCBHORUS)
   // 2 new pots from X10:
   //  - copy btw. 'chkSum' and 'auxSerialMode' (excl.)
-  memcpy(&settings.chkSum, &oldSettings.chkSum, offsetof(RadioData, auxSerialMode) - offsetof(RadioData, chkSum));
+  memcpy(&settings.chkSum, &oldSettings.chkSum, offsetof(RadioData, switchConfig) - sizeof(uint8_t) - offsetof(RadioData, chkSum));
   //  - move calibration data
   memcpy(&settings.calib[NUM_STICKS + 5], &oldSettings.calib[NUM_STICKS + 3], sizeof(CalibData) * (STORAGE_NUM_SLIDERS + STORAGE_NUM_MOUSE_ANALOGS));
   memclear(&settings.calib[NUM_STICKS + 3], sizeof(CalibData) * 2);
diff --git a/radio/src/targets/common/arm/stm32/aux_serial_driver.cpp b/radio/src/targets/common/arm/stm32/aux_serial_driver.cpp
index 58f27fed5..35a23073c 100644
--- a/radio/src/targets/common/arm/stm32/aux_serial_driver.cpp
+++ b/radio/src/targets/common/arm/stm32/aux_serial_driver.cpp
@@ -193,5 +193,181 @@ extern "C" void AUX_SERIAL_USART_IRQHandler(void)
   }
 #endif
 }
+#endif
+
+#if defined(AUX2_SERIAL)
+uint8_t aux2SerialMode = 0;
+Fifo<uint8_t, 512> aux2SerialTxFifo;
+AuxSerialRxFifo aux2SerialRxFifo __DMA (AUX2_SERIAL_DMA_Stream_RX);
+
+void aux2SerialSetup(unsigned int baudrate, bool dma)
+{
+  USART_InitTypeDef USART_InitStructure;
+  GPIO_InitTypeDef GPIO_InitStructure;
+
+  GPIO_PinAFConfig(AUX2_SERIAL_GPIO, AUX2_SERIAL_GPIO_PinSource_RX, AUX2_SERIAL_GPIO_AF);
+  GPIO_PinAFConfig(AUX2_SERIAL_GPIO, AUX2_SERIAL_GPIO_PinSource_TX, AUX2_SERIAL_GPIO_AF);
+
+  GPIO_InitStructure.GPIO_Pin = AUX2_SERIAL_GPIO_PIN_TX | AUX2_SERIAL_GPIO_PIN_RX;
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
+  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
+  GPIO_Init(AUX2_SERIAL_GPIO, &GPIO_InitStructure);
+
+#if defined(AUX2_SERIAL_PWR_GPIO)
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
+  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
+  GPIO_InitStructure.GPIO_Pin = AUX2_SERIAL_PWR_GPIO_PIN;
+  GPIO_Init(AUX2_SERIAL_PWR_GPIO, &GPIO_InitStructure);
+#endif
+
+  USART_InitStructure.USART_BaudRate = baudrate;
+  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
+  USART_InitStructure.USART_StopBits = USART_StopBits_1;
+  USART_InitStructure.USART_Parity = USART_Parity_No;
+  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
+  USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
+  USART_Init(AUX2_SERIAL_USART, &USART_InitStructure);
+
+  if (dma) {
+    DMA_InitTypeDef DMA_InitStructure;
+    aux2SerialRxFifo.clear();
+    USART_ITConfig(AUX2_SERIAL_USART, USART_IT_RXNE, DISABLE);
+    USART_ITConfig(AUX2_SERIAL_USART, USART_IT_TXE, DISABLE);
+    DMA_InitStructure.DMA_Channel = AUX2_SERIAL_DMA_Channel_RX;
+    DMA_InitStructure.DMA_PeripheralBaseAddr = CONVERT_PTR_UINT(&AUX2_SERIAL_USART->DR);
+    DMA_InitStructure.DMA_Memory0BaseAddr = CONVERT_PTR_UINT(aux2SerialRxFifo.buffer());
+    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
+    DMA_InitStructure.DMA_BufferSize = aux2SerialRxFifo.size();
+    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
+    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
+    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
+    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
+    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
+    DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
+    DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
+    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
+    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
+    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
+    DMA_Init(AUX2_SERIAL_DMA_Stream_RX, &DMA_InitStructure);
+    USART_DMACmd(AUX2_SERIAL_USART, USART_DMAReq_Rx, ENABLE);
+    USART_Cmd(AUX2_SERIAL_USART, ENABLE);
+    DMA_Cmd(AUX2_SERIAL_DMA_Stream_RX, ENABLE);
+  }
+  else {
+    USART_Cmd(AUX2_SERIAL_USART, ENABLE);
+    USART_ITConfig(AUX2_SERIAL_USART, USART_IT_RXNE, ENABLE);
+    USART_ITConfig(AUX2_SERIAL_USART, USART_IT_TXE, DISABLE);
+    NVIC_SetPriority(AUX2_SERIAL_USART_IRQn, 7);
+    NVIC_EnableIRQ(AUX2_SERIAL_USART_IRQn);
+  }
+}
+
+void aux2SerialInit(unsigned int mode, unsigned int protocol)
+{
+  aux2SerialStop();
+
+  aux2SerialMode = mode;
+
+  switch (mode) {
+    case UART_MODE_TELEMETRY_MIRROR:
+#if defined(CROSSFIRE)
+      if (protocol == PROTOCOL_TELEMETRY_CROSSFIRE) {
+        aux2SerialSetup(CROSSFIRE_TELEM_MIRROR_BAUDRATE, false);
+        break;
+      }
+#endif
+      aux2SerialSetup(FRSKY_TELEM_MIRROR_BAUDRATE, false);
+      break;
+
+#if defined(DEBUG) || defined(CLI)
+    case UART_MODE_DEBUG:
+      aux2SerialSetup(DEBUG_BAUDRATE, false);
+      break;
+#endif
+
+    case UART_MODE_TELEMETRY:
+      if (protocol == PROTOCOL_TELEMETRY_FRSKY_D_SECONDARY) {
+        aux2SerialSetup(FRSKY_D_BAUDRATE, true);
+      }
+      break;
+
+    case UART_MODE_LUA:
+      aux2SerialSetup(DEBUG_BAUDRATE, false);
+  }
+}
+
+void aux2SerialPutc(char c)
+{
+#if !defined(SIMU)
+  int n = 0;
+  while (aux2SerialTxFifo.isFull()) {
+    delay_ms(1);
+    if (++n > 100) return;
+  }
+  aux2SerialTxFifo.push(c);
+  USART_ITConfig(AUX2_SERIAL_USART, USART_IT_TXE, ENABLE);
+#endif
+}
+
+void aux2SerialSbusInit()
+{
+  aux2SerialSetup(SBUS_BAUDRATE, true);
+  AUX2_SERIAL_USART->CR1 |= USART_CR1_M | USART_CR1_PCE ;
+  AUX2_SERIAL_POWER_ON();
+}
+
+void aux2SerialStop()
+{
+  DMA_DeInit(AUX2_SERIAL_DMA_Stream_RX);
+  USART_DeInit(AUX2_SERIAL_USART);
+}
+
+uint8_t aux2SerialTracesEnabled()
+{
+#if defined(DEBUG)
+  return (aux2SerialMode == UART_MODE_DEBUG);
+#else
+  return false;
+#endif
+}
+
+#if !defined(SIMU)
+extern "C" void AUX2_SERIAL_USART_IRQHandler(void)
+{
+  DEBUG_INTERRUPT(INT_SER2);
+  // Send
+  if (USART_GetITStatus(AUX2_SERIAL_USART, USART_IT_TXE) != RESET) {
+    uint8_t txchar;
+    if (aux2SerialTxFifo.pop(txchar)) {
+      /* Write one byte to the transmit data register */
+      USART_SendData(AUX2_SERIAL_USART, txchar);
+    }
+    else {
+      USART_ITConfig(AUX2_SERIAL_USART, USART_IT_TXE, DISABLE);
+    }
+  }
+
+#if defined(CLI)
+  if (getSelectedUsbMode() != USB_SERIAL_MODE) {
+    // Receive
+    uint32_t status = AUX2_SERIAL_USART->SR;
+    while (status & (USART_FLAG_RXNE | USART_FLAG_ERRORS)) {
+      uint8_t data = AUX2_SERIAL_USART->DR;
+      if (!(status & USART_FLAG_ERRORS)) {
+        switch (aux2SerialMode) {
+          case UART_MODE_DEBUG:
+            cliRxFifo.push(data);
+            break;
+        }
+      }
+      status = AUX2_SERIAL_USART->SR;
+    }
+  }
+#endif
+}
+#endif
+
 #endif
 #endif // AUX_SERIAL
diff --git a/radio/src/targets/common/arm/stm32/bootloader/boot.cpp b/radio/src/targets/common/arm/stm32/bootloader/boot.cpp
index b0079b49e..c849f9e9a 100644
--- a/radio/src/targets/common/arm/stm32/bootloader/boot.cpp
+++ b/radio/src/targets/common/arm/stm32/bootloader/boot.cpp
@@ -197,15 +197,15 @@ int main()
 
   RCC_AHB1PeriphClockCmd(PWR_RCC_AHB1Periph | KEYS_RCC_AHB1Periph |
                          LCD_RCC_AHB1Periph | BACKLIGHT_RCC_AHB1Periph |
-                         AUX_SERIAL_RCC_AHB1Periph | I2C_RCC_AHB1Periph |
+                         AUX_SERIAL_RCC_AHB1Periph | AUX2_SERIAL_RCC_AHB1Periph | I2C_RCC_AHB1Periph |
                          SD_RCC_AHB1Periph, ENABLE);
 
   RCC_APB1PeriphClockCmd(ROTARY_ENCODER_RCC_APB1Periph | LCD_RCC_APB1Periph | BACKLIGHT_RCC_APB1Periph |
                          INTERRUPT_xMS_RCC_APB1Periph | I2C_RCC_APB1Periph |
-                         AUX_SERIAL_RCC_APB1Periph |
+                         AUX_SERIAL_RCC_APB1Periph | AUX2_SERIAL_RCC_APB1Periph |
                          SD_RCC_APB1Periph, ENABLE);
 
-  RCC_APB2PeriphClockCmd(LCD_RCC_APB2Periph | BACKLIGHT_RCC_APB2Periph | RCC_APB2Periph_SYSCFG | AUX_SERIAL_RCC_APB2Periph, ENABLE);
+  RCC_APB2PeriphClockCmd(LCD_RCC_APB2Periph | BACKLIGHT_RCC_APB2Periph | RCC_APB2Periph_SYSCFG | AUX_SERIAL_RCC_APB2Periph  | AUX2_SERIAL_RCC_APB2Periph, ENABLE);
 
   pwrInit();
   keysInit();
@@ -249,6 +249,9 @@ int main()
 #if defined(DEBUG) && defined(AUX_SERIAL)
   auxSerialInit(UART_MODE_DEBUG, 0); // default serial mode (None if DEBUG not defined)
 #endif
+#if defined(DEBUG) && defined(AUX2_SERIAL)
+  aux2SerialInit(UART_MODE_DEBUG, 0); // default serial mode (None if DEBUG not defined)
+#endif
 
   __enable_irq();
 
diff --git a/radio/src/targets/horus/CMakeLists.txt b/radio/src/targets/horus/CMakeLists.txt
index a02abfa12..b1a01e2e1 100644
--- a/radio/src/targets/horus/CMakeLists.txt
+++ b/radio/src/targets/horus/CMakeLists.txt
@@ -64,8 +64,9 @@ if (PCB STREQUAL X10)
     set(HARDWARE_TOUCH YES)
     set(USB_CHARGER YES)
     set(DEFAULT_THEME "DARKBLUE")
+    set(AUX_SERIAL ON)
     if (NOT BLUETOOTH)
-      set(AUX_SERIAL ON)
+      set(AUX2_SERIAL ON)
     endif()
   else()
     set(FLAVOUR x10)
@@ -238,6 +239,11 @@ if (AUX_SERIAL)
   set(AUX_SERIAL_DRIVER ../common/arm/stm32/aux_serial_driver.cpp)
 endif()
 
+if (AUX2_SERIAL)
+  add_definitions(-DAUX2_SERIAL)
+  set(AUX_SERIAL_DRIVER ../common/arm/stm32/aux_serial_driver.cpp)
+endif()
+
 set(FIRMWARE_TARGET_SRC
   ${FIRMWARE_TARGET_SRC}
   ${LCD_DRIVER}
diff --git a/radio/src/targets/horus/board.cpp b/radio/src/targets/horus/board.cpp
index 15b14ac2f..704a6f27c 100644
--- a/radio/src/targets/horus/board.cpp
+++ b/radio/src/targets/horus/board.cpp
@@ -96,6 +96,7 @@ void boardInit()
                          KEYS_RCC_AHB1Periph |
                          ADC_RCC_AHB1Periph |
                          AUX_SERIAL_RCC_AHB1Periph |
+                         AUX2_SERIAL_RCC_AHB1Periph |
                          TELEMETRY_RCC_AHB1Periph |
                          TRAINER_RCC_AHB1Periph |
                          BT_RCC_AHB1Periph |
@@ -116,6 +117,7 @@ void boardInit()
                          TIMER_2MHz_RCC_APB1Periph |
                          AUDIO_RCC_APB1Periph |
                          AUX_SERIAL_RCC_APB1Periph |
+                         AUX2_SERIAL_RCC_APB1Periph |
                          TELEMETRY_RCC_APB1Periph |
                          TRAINER_RCC_APB1Periph |
                          AUDIO_RCC_APB1Periph |
@@ -135,6 +137,7 @@ void boardInit()
                          TELEMETRY_RCC_APB2Periph |
                          BT_RCC_APB2Periph |
                          AUX_SERIAL_RCC_APB2Periph |
+                         AUX2_SERIAL_RCC_APB2Periph |
                          BACKLIGHT_RCC_APB2Periph,
                          ENABLE);
 
@@ -147,6 +150,9 @@ void boardInit()
 #if defined(DEBUG) && defined(AUX_SERIAL)
   auxSerialInit(UART_MODE_DEBUG, 0); // default serial mode (None if DEBUG not defined)
 #endif
+#if defined(DEBUG) && defined(AUX2_SERIAL)
+  aux2SerialInit(UART_MODE_DEBUG, 0); // default serial mode (None if DEBUG not defined)
+#endif
 
   TRACE("\nHorus board started :)");
   TRACE("RCC->CSR = %08x", RCC->CSR);
diff --git a/radio/src/targets/horus/board.h b/radio/src/targets/horus/board.h
index 437346078..74ebd7368 100644
--- a/radio/src/targets/horus/board.h
+++ b/radio/src/targets/horus/board.h
@@ -615,7 +615,7 @@ void sportUpdatePowerInit();
 #define IS_SPORT_UPDATE_POWER_ON()     (false)
 #endif
 
-// Second serial port driver
+// Aux serial port driver
 #if defined(AUX_SERIAL_GPIO)
 #define DEBUG_BAUDRATE                  115200
 extern uint8_t auxSerialMode;
@@ -635,6 +635,25 @@ void auxSerialPowerOff();
 #endif
 #endif
 
+// Aux2 serial port driver
+#if defined(AUX2_SERIAL)
+extern uint8_t aux2SerialMode;
+void aux2SerialInit(unsigned int mode, unsigned int protocol);
+void aux2SerialPutc(char c);
+#define aux2SerialTelemetryInit(protocol) aux2SerialInit(UART_MODE_TELEMETRY, protocol)
+void aux2SerialSbusInit();
+void aux2SerialStop();
+void aux2SerialPowerOn();
+void aux2SerialPowerOff();
+#if defined(AUX2_SERIAL_PWR_GPIO)
+#define AUX2_SERIAL_POWER_ON()            aux2SerialPowerOn()
+#define AUX2_SERIAL__POWER_OFF()          aux2SerialPowerOff()
+#else
+#define AUX2_SERIAL_POWER_ON()
+#define AUX2_SERIAL__POWER_OFF()
+#endif
+#endif
+
 // Haptic driver
 void hapticInit();
 void hapticDone();
diff --git a/radio/src/targets/horus/hal.h b/radio/src/targets/horus/hal.h
index c37f1ba54..f964e0137 100644
--- a/radio/src/targets/horus/hal.h
+++ b/radio/src/targets/horus/hal.h
@@ -433,6 +433,10 @@
   #define AUX2_SERIAL_DMA_Channel_RX           DMA_Channel_5
   #define AUX2_SERIAL_PWR_GPIO                 GPIOB
   #define AUX2_SERIAL_PWR_GPIO_PIN             GPIO_Pin_0  // PB.00
+#else
+  #define AUX2_SERIAL_RCC_AHB1Periph           0
+  #define AUX2_SERIAL_RCC_APB1Periph           0
+  #define AUX2_SERIAL_RCC_APB2Periph           0
 #endif
 
 // Telemetry
diff --git a/radio/src/targets/simu/simpgmspace.cpp b/radio/src/targets/simu/simpgmspace.cpp
index 73a4948ca..fa0122175 100644
--- a/radio/src/targets/simu/simpgmspace.cpp
+++ b/radio/src/targets/simu/simpgmspace.cpp
@@ -787,3 +787,23 @@ void auxSerialStop()
 {
 }
 #endif
+
+#if defined(AUX2_SERIAL)
+AuxSerialRxFifo aux2SerialRxFifo(nullptr);
+uint8_t aux2SerialMode;
+void aux2SerialInit(unsigned int mode, unsigned int protocol)
+{
+}
+
+void aux2SerialPutc(char c)
+{
+}
+
+void aux2SerialSbusInit()
+{
+}
+
+void aux2SerialStop()
+{
+}
+#endif
diff --git a/radio/src/targets/taranis/board.h b/radio/src/targets/taranis/board.h
index acba12d76..e62b71523 100644
--- a/radio/src/targets/taranis/board.h
+++ b/radio/src/targets/taranis/board.h
@@ -785,7 +785,7 @@ void hapticOff();
   void hapticOn();
 #endif
 
-// Second serial port driver
+// Aux serial port driver
 #if defined(AUX_SERIAL_GPIO)
 #define DEBUG_BAUDRATE                  115200
 #define AUX_SERIAL
@@ -796,7 +796,7 @@ void auxSerialPutc(char c);
 void auxSerialSbusInit();
 void auxSerialStop();
 #define AUX_SERIAL_POWER_ON()
-#define AUX_SERIAL__POWER_OFF()
+#define AUX_SERIAL_POWER_OFF()
 #endif
 
 // BT driver
diff --git a/radio/src/targets/taranis/hal.h b/radio/src/targets/taranis/hal.h
index b55226edf..cfe9830b7 100644
--- a/radio/src/targets/taranis/hal.h
+++ b/radio/src/targets/taranis/hal.h
@@ -1323,6 +1323,11 @@
   #define AUX_SERIAL_DMA_Channel_RX         DMA_Channel_4
 #endif
 
+// No aux2 on taranis
+#define AUX2_SERIAL_RCC_AHB1Periph           0
+#define AUX2_SERIAL_RCC_APB1Periph           0
+#define AUX2_SERIAL_RCC_APB2Periph           0
+
 // Telemetry
 #define TELEMETRY_RCC_AHB1Periph        (RCC_AHB1Periph_GPIOD | RCC_AHB1Periph_DMA1)
 #define TELEMETRY_RCC_APB1Periph        RCC_APB1Periph_USART2
diff --git a/radio/src/telemetry/crossfire.cpp b/radio/src/telemetry/crossfire.cpp
index 724fbe1a0..07f3577f4 100644
--- a/radio/src/telemetry/crossfire.cpp
+++ b/radio/src/telemetry/crossfire.cpp
@@ -201,6 +201,11 @@ void processCrossfireTelemetryData(uint8_t data)
     auxSerialPutc(data);
   }
 #endif
+#if defined(AUX2_SERIAL)
+  if (g_eeGeneral.aux2SerialMode == UART_MODE_TELEMETRY_MIRROR) {
+    aux2SerialPutc(data);
+  }
+#endif
 
   if (telemetryRxBufferCount == 0 && data != RADIO_ADDRESS) {
     TRACE("[XF] address 0x%02X error", data);
diff --git a/radio/src/telemetry/frsky.cpp b/radio/src/telemetry/frsky.cpp
index 0fe1a5bfd..611ece4ac 100644
--- a/radio/src/telemetry/frsky.cpp
+++ b/radio/src/telemetry/frsky.cpp
@@ -32,6 +32,11 @@ void processFrskyTelemetryData(uint8_t data)
     auxSerialPutc(data);
   }
 #endif
+#if defined(AUX2_SERIAL)
+  if (g_eeGeneral.aux2SerialMode == UART_MODE_TELEMETRY_MIRROR) {
+    aux2SerialPutc(data);
+  }
+#endif
 
   if (pushFrskyTelemetryData(data)) {
     if (IS_FRSKY_SPORT_PROTOCOL()) {
diff --git a/radio/src/telemetry/multi.cpp b/radio/src/telemetry/multi.cpp
index 3719d660b..55f09eed3 100644
--- a/radio/src/telemetry/multi.cpp
+++ b/radio/src/telemetry/multi.cpp
@@ -322,6 +322,12 @@ static void processMultiTelemetryPaket(const uint8_t * packet, uint8_t module)
       auxSerialPutc(packet[c]);
   }
 #endif
+#if defined(AUX2_SERIAL)
+  if (g_eeGeneral.aux2SerialMode == UART_MODE_TELEMETRY_MIRROR) {
+    for (uint8_t c=0; c < len; c++)
+      aux2SerialPutc(packet[c]);
+  }
+#endif
 
   // Switch type
   switch (type) {
diff --git a/radio/src/translations.cpp b/radio/src/translations.cpp
index 4f43e33d1..39a5bc556 100644
--- a/radio/src/translations.cpp
+++ b/radio/src/translations.cpp
@@ -564,6 +564,7 @@ const char STR_ALTITUDE[] = TR_ALTITUDE;
 const char STR_SCALE[] = TR_SCALE;
 const char STR_VIEW_CHANNELS[] = TR_VIEW_CHANNELS;
 const char STR_AUX_SERIAL_MODE[] = TR_AUX_SERIAL_MODE;
+const char STR_AUX2_SERIAL_MODE[] = TR_AUX2_SERIAL_MODE;
 const char STR_THROTTLE_LABEL[] = TR_THROTTLE_LABEL;
 const char STR_SCRIPT[] = TR_SCRIPT;
 const char STR_INPUTS[] = TR_INPUTS;
diff --git a/radio/src/translations.h b/radio/src/translations.h
index 6b0038118..3e7536295 100644
--- a/radio/src/translations.h
+++ b/radio/src/translations.h
@@ -864,6 +864,7 @@ extern const char STR_SCALE[];
 extern const char STR_VIEW_CHANNELS[];
 extern const char STR_POTWARNING[];
 extern const char STR_AUX_SERIAL_MODE[];
+extern const char STR_AUX2_SERIAL_MODE[];
 extern const char STR_THROTTLE_LABEL[];
 extern const char STR_SCRIPT[];
 extern const char STR_INPUTS[];
diff --git a/radio/src/translations/cz.h.txt b/radio/src/translations/cz.h.txt
index 08ae06de2..4c04f2bf1 100644
--- a/radio/src/translations/cz.h.txt
+++ b/radio/src/translations/cz.h.txt
@@ -981,6 +981,7 @@
 #define TR_CHECKLIST                   TR(INDENT "Poznámky", INDENT "Zobrazit poznámky")
 #define TR_FAS_OFFSET                  TR(INDENT "FAS Ofs", INDENT "FAS Ofset")
 #define TR_AUX_SERIAL_MODE             "Seriový port"
+#define TR_AUX2_SERIAL_MODE            "Seriový port 2"
 #define TR_SCRIPT                      "Skript"
 #define TR_INPUTS                      "Vstupy"
 #define TR_OUTPUTS                     "Výstupy"
diff --git a/radio/src/translations/de.h.txt b/radio/src/translations/de.h.txt
index 62478e7ed..c9e91bd45 100644
--- a/radio/src/translations/de.h.txt
+++ b/radio/src/translations/de.h.txt
@@ -987,6 +987,7 @@
 #define TR_CHECKLIST                   TR(INDENT "Checkliste", INDENT "Checkliste anzeigen") //9XR-Pro
 #define TR_FAS_OFFSET                  TR(INDENT "FAS-Ofs", INDENT "FAS-Offset")
 #define TR_AUX_SERIAL_MODE             "Serieller Port"
+#define TR_AUX2_SERIAL_MODE            "Serieller Port 2"
 #define TR_SCRIPT                      "Lua-Skript"
 #define TR_INPUTS                      "Eingaben"
 #define TR_OUTPUTS                     "Ausgaben"
diff --git a/radio/src/translations/en.h.txt b/radio/src/translations/en.h.txt
index 72363c477..e7c30c01e 100644
--- a/radio/src/translations/en.h.txt
+++ b/radio/src/translations/en.h.txt
@@ -985,7 +985,8 @@
 #define TR_PREFLIGHT                   "Preflight Checks"
 #define TR_CHECKLIST                   TR(INDENT "Checklist", INDENT "Display checklist")
 #define TR_FAS_OFFSET                  TR(INDENT "FAS Ofs", INDENT "FAS offset")
-#define TR_AUX_SERIAL_MODE                   "Serial port"
+#define TR_AUX_SERIAL_MODE             "Serial port"
+#define TR_AUX2_SERIAL_MODE            "Serial port 2"
 #define TR_SCRIPT                      "Script"
 #define TR_INPUTS                      "Inputs"
 #define TR_OUTPUTS                     "Outputs"
diff --git a/radio/src/translations/es.h.txt b/radio/src/translations/es.h.txt
index b022314fa..428505c1c 100644
--- a/radio/src/translations/es.h.txt
+++ b/radio/src/translations/es.h.txt
@@ -985,6 +985,7 @@
 #define TR_CHECKLIST           TR(INDENT "Lista verif", INDENT "Lista verificación")
 #define TR_FAS_OFFSET          TR(INDENT "FAS Ofs", INDENT "FAS Offset")
 #define TR_AUX_SERIAL_MODE     "Puerto serie"
+#define TR_AUX2_SERIAL_MODE    "Puerto serie 2"
 #define TR_SCRIPT              "Script"
 #define TR_INPUTS              "Entradas"
 #define TR_OUTPUTS             "Salidas"
diff --git a/radio/src/translations/fi.h.txt b/radio/src/translations/fi.h.txt
index afaef5c33..4ff379551 100644
--- a/radio/src/translations/fi.h.txt
+++ b/radio/src/translations/fi.h.txt
@@ -999,7 +999,8 @@
 #define TR_PREFLIGHT           "Preflight Checks"
 #define TR_CHECKLIST           INDENT "Display Checklist"
 #define TR_FAS_OFFSET          TR(INDENT "FAS Ofs", INDENT "FAS Offset")
-#define TR_AUX_SERIAL_MODE           "Serial port"
+#define TR_AUX_SERIAL_MODE     "Serial port"
+#define TR_AUX2_SERIAL_MODE    "Serial port 2"
 #define TR_SCRIPT              "Script"
 #define TR_INPUTS              "Inputs"
 #define TR_OUTPUTS             "Outputs"
diff --git a/radio/src/translations/fr.h.txt b/radio/src/translations/fr.h.txt
index 422205dd5..e9e87f731 100644
--- a/radio/src/translations/fr.h.txt
+++ b/radio/src/translations/fr.h.txt
@@ -1002,6 +1002,7 @@
 #define TR_CHECKLIST                   TR(INDENT "Notes", INDENT "Afficher notes")
 #define TR_FAS_OFFSET                  TR(INDENT "Corr FAS", INDENT "Correction FAS")
 #define TR_AUX_SERIAL_MODE             "Port série"
+#define TR_AUX2_SERIAL_MODE            "Port série 2"
 #define TR_SCRIPT                      "Script"
 #define TR_INPUTS                      "Entrées"
 #define TR_OUTPUTS                     "Sorties"
diff --git a/radio/src/translations/it.h.txt b/radio/src/translations/it.h.txt
index 72223e759..37a494f8a 100644
--- a/radio/src/translations/it.h.txt
+++ b/radio/src/translations/it.h.txt
@@ -1001,7 +1001,8 @@
 #define TR_PREFLIGHT           "Controlli Prevolo"
 #define TR_CHECKLIST           INDENT "Mostra Checklist"
 #define TR_FAS_OFFSET          TR(INDENT "FAS Ofs", INDENT "FAS Offset")
-#define TR_AUX_SERIAL_MODE           "Porta Seriale"
+#define TR_AUX_SERIAL_MODE     "Porta Seriale"
+#define TR_AUX2_SERIAL_MODE    "Porta Seriale 2"
 #define TR_SCRIPT              "Script"
 #define TR_INPUTS              "Ingresso"
 #define TR_OUTPUTS             "Uscita"
diff --git a/radio/src/translations/nl.h.txt b/radio/src/translations/nl.h.txt
index f36f75cf1..397cdd636 100644
--- a/radio/src/translations/nl.h.txt
+++ b/radio/src/translations/nl.h.txt
@@ -987,7 +987,8 @@
 #define TR_PREFLIGHT           "Preflight Checks"
 #define TR_CHECKLIST           TR(INDENT "Checklist", INDENT "Toon Checklist")
 #define TR_FAS_OFFSET          TR(INDENT "FAS Ofs", INDENT "FAS Offset")
-#define TR_AUX_SERIAL_MODE           "Seriele poort"
+#define TR_AUX_SERIAL_MODE     "Seriele poort"
+#define TR_AUX2_SERIAL_MODE    "Seriele poort 2"
 #define TR_SCRIPT              "Script"
 #define TR_INPUTS              "Inputs"
 #define TR_OUTPUTS             "Outputs"
diff --git a/radio/src/translations/pl.h.txt b/radio/src/translations/pl.h.txt
index 5fd59c2ec..370d757f6 100644
--- a/radio/src/translations/pl.h.txt
+++ b/radio/src/translations/pl.h.txt
@@ -1000,7 +1000,8 @@
 #define TR_PREFLIGHT           "Lista Ostrzeżeń"
 #define TR_CHECKLIST           TR(INDENT "Czeklista",INDENT "Pokaż Listę Ostrzeżeń")
 #define TR_FAS_OFFSET          TR(INDENT "FAS Ofs", INDENT "FAS Offset")
-#define TR_AUX_SERIAL_MODE           "Port szreg."
+#define TR_AUX_SERIAL_MODE     "Port szreg."
+#define TR_AUX2_SERIAL_MODE    "Port szreg. 2"
 #define TR_SCRIPT              "Skrypt"
 #define TR_INPUTS              "Wejścia"
 #define TR_OUTPUTS             "Wyjścia"
diff --git a/radio/src/translations/pt.h.txt b/radio/src/translations/pt.h.txt
index 857bc3c35..a9b5d0027 100644
--- a/radio/src/translations/pt.h.txt
+++ b/radio/src/translations/pt.h.txt
@@ -990,7 +990,8 @@
 #define TR_PREFLIGHT           "Preflight Checks"
 #define TR_CHECKLIST           INDENT "Display Checklist"
 #define TR_FAS_OFFSET          TR(INDENT "FAS Ofs", INDENT "FAS Offset")
-#define TR_AUX_SERIAL_MODE           "Serial port"
+#define TR_AUX_SERIAL_MODE     "Serial port"
+#define TR_AUX2_SERIAL_MODE    "Serial port 2"
 #define TR_SCRIPT              "Script"
 #define TR_INPUTS              "Inputs"
 #define TR_OUTPUTS             "Outputs"
diff --git a/radio/src/translations/se.h.txt b/radio/src/translations/se.h.txt
index feff5f1d2..1578d86a1 100644
--- a/radio/src/translations/se.h.txt
+++ b/radio/src/translations/se.h.txt
@@ -1000,7 +1000,8 @@
 #define TR_PREFLIGHT           "Startkontroller"
 #define TR_CHECKLIST           TR(INDENT "Checklista", INDENT "Visa Checklista")
 #define TR_FAS_OFFSET          TR(INDENT "FAS Ofs", INDENT "FAS Offset")
-#define TR_AUX_SERIAL_MODE           "Serieporten"
+#define TR_AUX_SERIAL_MODE     "Serieporten"
+#define TR_AUX2_SERIAL_MODE    "Serieporten 2"
 #define TR_SCRIPT              "Programkod"
 #define TR_INPUTS              "Input"
 #define TR_OUTPUTS             "Outputs"