diff --git a/radio/src/gui/common/stdlcd/radio_sdmanager.cpp b/radio/src/gui/common/stdlcd/radio_sdmanager.cpp
index d86ebbb95..6587aabc2 100644
--- a/radio/src/gui/common/stdlcd/radio_sdmanager.cpp
+++ b/radio/src/gui/common/stdlcd/radio_sdmanager.cpp
@@ -88,7 +88,9 @@ void onSdFormatConfirm(const char * result)
 void onUpdateConfirmation(const char * result)
 {
   if (result == STR_OK) {
-    // TODO OTA Update
+    OtaUpdateInformation * destination = moduleState[EXTERNAL_MODULE].otaUpdateInformation;
+    Pxx2OtaUpdate otaUpdate(EXTERNAL_MODULE, destination->candidateReceiversNames[destination->selectedReceiverIndex]);
+    otaUpdate.flashFirmware(destination->filename);
   }
   else {
     moduleState[EXTERNAL_MODULE].mode = MODULE_MODE_NORMAL;
@@ -97,14 +99,14 @@ void onUpdateConfirmation(const char * result)
 
 void onUpdateStateChanged()
 {
-  if (reusableBuffer.sdManager.otaInformation.step == BIND_INFO_REQUEST) {
-    POPUP_CONFIRMATION(PXX2receiversModels[reusableBuffer.sdManager.otaInformation.receiverInformation.modelID], onUpdateConfirmation);
+  if (reusableBuffer.sdManager.otaUpdateInformation.step == BIND_INFO_REQUEST) {
+    POPUP_CONFIRMATION(PXX2receiversModels[reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.modelID], onUpdateConfirmation);
     char * tmp = strAppend(reusableBuffer.sdManager.otaReceiverVersion, TR_CURRENT_VERSION);
-    tmp = strAppendUnsigned(tmp, 1 + reusableBuffer.sdManager.otaInformation.receiverInformation.swVersion.major);
+    tmp = strAppendUnsigned(tmp, 1 + reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.swVersion.major);
     *tmp++ = '.';
-    tmp = strAppendUnsigned(tmp, reusableBuffer.sdManager.otaInformation.receiverInformation.swVersion.minor);
+    tmp = strAppendUnsigned(tmp, reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.swVersion.minor);
     *tmp++ = '.';
-    tmp = strAppendUnsigned(tmp, reusableBuffer.sdManager.otaInformation.receiverInformation.swVersion.revision);
+    tmp = strAppendUnsigned(tmp, reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.swVersion.revision);
     SET_WARNING_INFO(reusableBuffer.sdManager.otaReceiverVersion, tmp - reusableBuffer.sdManager.otaReceiverVersion, 0);
   }
 }
@@ -203,9 +205,9 @@ void onSdManagerMenu(const char * result)
   }
 #endif
   else if (result == STR_FLASH_RECEIVER_OTA) {
-    getSelectionFullPath(lfn);
-    memclear(&reusableBuffer.sdManager.otaInformation, sizeof(BindInformation));
-    moduleState[EXTERNAL_MODULE].startBind(&reusableBuffer.sdManager.otaInformation, onUpdateStateChanged);
+    memclear(&reusableBuffer.sdManager.otaUpdateInformation, sizeof(OtaUpdateInformation));
+    getSelectionFullPath(reusableBuffer.sdManager.otaUpdateInformation.filename);
+    moduleState[EXTERNAL_MODULE].startBind(&reusableBuffer.sdManager.otaUpdateInformation, onUpdateStateChanged);
   }
 #endif
 #if defined(LUA)
@@ -219,10 +221,10 @@ void onSdManagerMenu(const char * result)
 void onUpdateReceiverSelection(const char * result)
 {
   if (result != STR_EXIT) {
-    reusableBuffer.sdManager.otaInformation.selectedReceiverIndex = (result - reusableBuffer.sdManager.otaInformation.candidateReceiversNames[0]) / sizeof(reusableBuffer.sdManager.otaInformation.candidateReceiversNames[0]);
-    reusableBuffer.sdManager.otaInformation.step = BIND_INFO_REQUEST;
+    reusableBuffer.sdManager.otaUpdateInformation.selectedReceiverIndex = (result - reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversNames[0]) / sizeof(reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversNames[0]);
+    reusableBuffer.sdManager.otaUpdateInformation.step = BIND_INFO_REQUEST;
 #if defined(SIMU)
-    reusableBuffer.sdManager.otaInformation.receiverInformation.modelID = 0x01;
+    reusableBuffer.sdManager.otaUpdateInformation.receiverInformation.modelID = 0x01;
     onUpdateStateChanged();
 #endif
   }
@@ -483,11 +485,11 @@ void menuRadioSdManager(event_t _event)
     }
 
     if (moduleState[EXTERNAL_MODULE].mode == MODULE_MODE_BIND) {
-      if (reusableBuffer.sdManager.otaInformation.step == BIND_INIT) {
-        if (reusableBuffer.sdManager.otaInformation.candidateReceiversCount > 0) {
-          popupMenuItemsCount = min<uint8_t>(reusableBuffer.sdManager.otaInformation.candidateReceiversCount, PXX2_MAX_RECEIVERS_PER_MODULE);
+      if (reusableBuffer.sdManager.otaUpdateInformation.step == BIND_INIT) {
+        if (reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversCount > 0) {
+          popupMenuItemsCount = min<uint8_t>(reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversCount, PXX2_MAX_RECEIVERS_PER_MODULE);
           for (uint8_t i=0; i<popupMenuItemsCount; i++) {
-            popupMenuItems[i] = reusableBuffer.sdManager.otaInformation.candidateReceiversNames[i];
+            popupMenuItems[i] = reusableBuffer.sdManager.otaUpdateInformation.candidateReceiversNames[i];
           }
           popupMenuTitle = STR_PXX2_SELECT_RX;
           CLEAR_POPUP();
diff --git a/radio/src/opentx.h b/radio/src/opentx.h
index 629446b85..3b76afeee 100644
--- a/radio/src/opentx.h
+++ b/radio/src/opentx.h
@@ -1164,7 +1164,7 @@ union ReusableBuffer
     uint16_t offset;
     uint16_t count;
     char originalName[SD_SCREEN_FILE_LENGTH+1];
-    BindInformation otaInformation;
+    OtaUpdateInformation otaUpdateInformation;
     char otaReceiverVersion[sizeof(TR_CURRENT_VERSION) + 12];
   } sdManager;
 #endif
diff --git a/radio/src/pulses/pulses.h b/radio/src/pulses/pulses.h
index a1f32c7fc..f50c2b638 100644
--- a/radio/src/pulses/pulses.h
+++ b/radio/src/pulses/pulses.h
@@ -27,6 +27,7 @@
 #include "pulses/pxx1.h"
 #include "pulses/pxx2.h"
 #include "modules.h"
+#include "ff.h"
 
 #if NUM_MODULES > 1
   #define IS_RANGECHECK_ENABLE()             (moduleState[0].mode == MODULE_MODE_RANGECHECK || moduleState[1].mode == MODULE_MODE_RANGECHECK)
@@ -77,7 +78,8 @@ enum ModuleSettingsMode
   MODULE_MODE_BIND,
   MODULE_MODE_SHARE,
   MODULE_MODE_RANGECHECK,
-  MODULE_MODE_RESET
+  MODULE_MODE_RESET,
+  MODULE_MODE_OTA_UPDATE,
 };
 
 
@@ -104,35 +106,44 @@ PACK(struct ModuleInformation {
   } receivers[PXX2_MAX_RECEIVERS_PER_MODULE];
 });
 
-struct ModuleSettings {
-  uint8_t state;  // 0x00 = READ 0x40 = WRITE
-  tmr10ms_t retryTime;
-  uint8_t rfProtocol;
-  uint8_t externalAntenna;
-  int8_t txPower;
+class ModuleSettings {
+  public:
+    uint8_t state;  // 0x00 = READ 0x40 = WRITE
+    tmr10ms_t retryTime;
+    uint8_t rfProtocol;
+    uint8_t externalAntenna;
+    int8_t txPower;
 };
 
-struct ReceiverSettings {
-  uint8_t state;  // 0x00 = READ 0x40 = WRITE
-  tmr10ms_t timeout;
-  uint8_t receiverId;
-  uint8_t dirty;
-  uint8_t telemetryDisabled;
-  uint8_t pwmRate;
-  uint8_t outputsCount;
-  uint8_t outputsMapping[24];
+class ReceiverSettings {
+  public:
+    uint8_t state;  // 0x00 = READ 0x40 = WRITE
+    tmr10ms_t timeout;
+    uint8_t receiverId;
+    uint8_t dirty;
+    uint8_t telemetryDisabled;
+    uint8_t pwmRate;
+    uint8_t outputsCount;
+    uint8_t outputsMapping[24];
 };
 
-struct BindInformation {
-  uint8_t step;
-  uint32_t timeout;
-  char candidateReceiversNames[PXX2_MAX_RECEIVERS_PER_MODULE][PXX2_LEN_RX_NAME + 1];
-  uint8_t candidateReceiversCount;
-  uint8_t selectedReceiverIndex;
-  uint8_t rxUid;
-  uint8_t lbtMode;
-  uint8_t flexMode;
-  PXX2HardwareInformation receiverInformation;
+class BindInformation {
+  public:
+    uint8_t step;
+    uint32_t timeout;
+    char candidateReceiversNames[PXX2_MAX_RECEIVERS_PER_MODULE][PXX2_LEN_RX_NAME + 1];
+    uint8_t candidateReceiversCount;
+    uint8_t selectedReceiverIndex;
+    uint8_t rxUid;
+    uint8_t lbtMode;
+    uint8_t flexMode;
+    PXX2HardwareInformation receiverInformation;
+};
+
+class OtaUpdateInformation: public BindInformation {
+  public:
+    char filename[_MAX_LFN+1];
+    uint32_t address;
 };
 
 typedef void (* ModuleCallback)();
@@ -156,6 +167,7 @@ PACK(struct ModuleState {
     ModuleInformation * moduleInformation;
     ModuleSettings * moduleSettings;
     BindInformation * bindInformation;
+    OtaUpdateInformation * otaUpdateInformation;
   };
   ModuleCallback callback;
 
diff --git a/radio/src/pulses/pxx2.cpp b/radio/src/pulses/pxx2.cpp
index c07795f28..c2b8cda00 100644
--- a/radio/src/pulses/pxx2.cpp
+++ b/radio/src/pulses/pxx2.cpp
@@ -287,8 +287,40 @@ void Pxx2Pulses::setupShareMode(uint8_t module)
   Pxx2Transport::addByte(reusableBuffer.moduleSetup.pxx2.shareReceiverIndex);
 }
 
+void Pxx2Pulses::sendOtaUpdate(uint8_t module, const char * rxName, uint32_t address, const char * data)
+{
+  initFrame();
+
+  addFrameType(PXX2_TYPE_C_OTA, PXX2_TYPE_ID_OTA);
+
+  if (rxName) {
+    Pxx2Transport::addByte(0x00);
+    for (uint8_t i=0; i<PXX2_LEN_RX_NAME; i++) {
+      Pxx2Transport::addByte(rxName[i]);
+    }
+  }
+  else if (data) {
+    Pxx2Transport::addByte(0x01);
+    Pxx2Transport::addWord(address);
+    for (uint8_t i=0; i<32; i++) {
+      Pxx2Transport::addByte(data[i]);
+    }
+  }
+  else {
+    Pxx2Transport::addByte(0x02);
+  }
+
+  endFrame();
+
+  if (module == EXTERNAL_MODULE)
+    extmoduleSendNextFrame();
+}
+
 void Pxx2Pulses::setupFrame(uint8_t module)
 {
+  if (moduleState[module].mode == MODULE_MODE_OTA_UPDATE)
+    return;
+
   initFrame();
 
   switch (moduleState[module].mode) {
@@ -336,3 +368,95 @@ void Pxx2Pulses::setupFrame(uint8_t module)
 
   endFrame();
 }
+
+bool Pxx2OtaUpdate::waitStep(uint8_t step, uint8_t timeout)
+{
+  OtaUpdateInformation * destination = moduleState[module].otaUpdateInformation;
+  uint8_t elapsed = 0;
+
+  watchdogSuspend(100);
+
+  while (step != destination->step) {
+    if (elapsed++ > timeout) {
+      return false;
+    }
+    RTOS_WAIT_MS(1);
+    telemetryWakeup();
+  }
+
+  return true;
+}
+
+const char * Pxx2OtaUpdate::doFlashFirmware(const char * filename)
+{
+  FIL file;
+  uint8_t buffer[32];
+  UINT count = 0;
+  OtaUpdateInformation * destination = moduleState[module].otaUpdateInformation;
+
+  destination->step = OTA_UPDATE_START;
+  extmodulePulsesData.pxx2.sendOtaUpdate(module, rxName, 0, nullptr);
+  if (!waitStep(OTA_UPDATE_START_ACK, 10)) {
+    return "OTA start failed";
+  }
+
+  if (f_open(&file, filename, FA_READ) != FR_OK) {
+    return "Opening file failed";
+  }
+
+  uint32_t size = f_size(&file);
+  uint32_t done = 0;
+  while (1) {
+    done += count;
+    drawProgressScreen(getBasename(filename), "OTA update...", done, size);
+    if (f_read(&file, buffer, sizeof(buffer), &count) != FR_OK) {
+      f_close(&file);
+      return "Reading file failed";
+    }
+    destination->step = OTA_UPDATE_TRANSFER;
+    extmodulePulsesData.pxx2.sendOtaUpdate(module, nullptr, done, (char *)buffer);
+    if (!waitStep(OTA_UPDATE_TRANSFER_ACK, 10)) {
+      return "OTA transfer failed";
+    }
+    if (count < sizeof(buffer)) {
+      f_close(&file);
+      break;
+    }
+  }
+
+  destination->step = OTA_UPDATE_EOF;
+  extmodulePulsesData.pxx2.sendOtaUpdate(module, nullptr, done, nullptr);
+  if (!waitStep(OTA_UPDATE_END, 10)) {
+    return "OTA end failed";
+  }
+
+  return nullptr;
+}
+
+void Pxx2OtaUpdate::flashFirmware(const char * filename)
+{
+  pausePulses();
+
+  watchdogSuspend(100);
+  RTOS_WAIT_MS(100);
+
+  moduleState[module].mode = MODULE_MODE_OTA_UPDATE;
+  const char * result = doFlashFirmware(filename);
+  moduleState[module].mode = MODULE_MODE_NORMAL;
+
+  AUDIO_PLAY(AU_SPECIAL_SOUND_BEEP1 );
+  BACKLIGHT_ENABLE();
+
+  if (result) {
+    POPUP_WARNING(STR_FIRMWARE_UPDATE_ERROR);
+    SET_WARNING_INFO(result, strlen(result), 0);
+  }
+  else {
+    POPUP_INFORMATION(STR_FIRMWARE_UPDATE_SUCCESS);
+  }
+
+  watchdogSuspend(100);
+  RTOS_WAIT_MS(100);
+
+  resumePulses();
+}
diff --git a/radio/src/pulses/pxx2.h b/radio/src/pulses/pxx2.h
index 49227c62a..4a5ba5d55 100644
--- a/radio/src/pulses/pxx2.h
+++ b/radio/src/pulses/pxx2.h
@@ -41,6 +41,7 @@
   #define PXX2_TYPE_ID_SPECTRUM     0x02
 
 #define PXX2_TYPE_C_OTA             0xFE
+  #define PXX2_TYPE_ID_OTA          0x02
 
 #define PXX2_CHANNELS_FLAG0_FAILSAFE         (1 << 6)
 #define PXX2_CHANNELS_FLAG0_RANGECHECK       (1 << 7)
@@ -130,6 +131,15 @@ enum PXX2BindSteps {
   BIND_OK
 };
 
+enum PXX2OtaUpdateSteps {
+  OTA_UPDATE_START = BIND_OK + 1,
+  OTA_UPDATE_START_ACK,
+  OTA_UPDATE_TRANSFER,
+  OTA_UPDATE_TRANSFER_ACK,
+  OTA_UPDATE_EOF,
+  OTA_UPDATE_END
+};
+
 enum PXX2ReceiverStatus {
   PXX2_HARDWARE_INFO,
   PXX2_SETTINGS_READ,
@@ -178,6 +188,8 @@ class Pxx2Transport: public DataBuffer<uint8_t, 64>, public Pxx2CrcMixin {
 };
 
 class Pxx2Pulses: public Pxx2Transport {
+  friend class Pxx2OtaUpdate;
+
   public:
     void setupFrame(uint8_t module);
 
@@ -204,6 +216,8 @@ class Pxx2Pulses: public Pxx2Transport {
 
     void setupPowerMeter(uint8_t module);
 
+    void sendOtaUpdate(uint8_t module, const char * rxName, uint32_t address, const char * data);
+
     void addHead()
     {
       // send 7E, do not CRC
@@ -265,4 +279,22 @@ class Pxx2Pulses: public Pxx2Transport {
     }
 };
 
+class Pxx2OtaUpdate {
+  public:
+    Pxx2OtaUpdate(uint8_t module, const char * rxName):
+      module(module),
+      rxName(rxName)
+    {
+    }
+
+    void flashFirmware(const char * filename);
+
+  protected:
+    uint8_t module;
+    const char * rxName;
+
+    const char * doFlashFirmware(const char * filename);
+    bool waitStep(uint8_t step, uint8_t timeout);
+};
+
 #endif
diff --git a/radio/src/telemetry/frsky_pxx2.cpp b/radio/src/telemetry/frsky_pxx2.cpp
index 674a19654..7e05082fb 100644
--- a/radio/src/telemetry/frsky_pxx2.cpp
+++ b/radio/src/telemetry/frsky_pxx2.cpp
@@ -239,6 +239,32 @@ void processPowerMeterFrame(uint8_t module, uint8_t * frame)
   }
 }
 
+void processOtaUpdateFrame(uint8_t module, uint8_t * frame)
+{
+  if (moduleState[module].mode != MODULE_MODE_OTA_UPDATE) {
+    return;
+  }
+
+  OtaUpdateInformation * destination = moduleState[module].otaUpdateInformation;
+
+  if (destination->step == OTA_UPDATE_START) {
+    if (frame[3] == 0x00 && memcmp(&destination->candidateReceiversNames[destination->selectedReceiverIndex], &frame[4], PXX2_LEN_RX_NAME) == 0) {
+      destination->step = OTA_UPDATE_START_ACK;
+    }
+  }
+  else if (destination->step == OTA_UPDATE_TRANSFER) {
+    uint32_t address = *((uint32_t *)&frame[4]);
+    if (frame[3] == 0x01 && destination->address == address) {
+      destination->step = OTA_UPDATE_TRANSFER_ACK;
+    }
+  }
+  else if (destination->step == OTA_UPDATE_EOF) {
+    if (frame[3] == 0x02) {
+      destination->step = OTA_UPDATE_END;
+    }
+  }
+}
+
 void processModuleFrame(uint8_t module, uint8_t *frame)
 {
   switch (frame[2]) {
@@ -296,6 +322,10 @@ void processPXX2Frame(uint8_t module, uint8_t *frame)
       processToolsFrame(module, frame);
       break;
 
+    case PXX2_TYPE_C_OTA:
+      processOtaUpdateFrame(module, frame);
+      break;
+
     default:
       break;
   }