diff --git a/radio/src/bluetooth.cpp b/radio/src/bluetooth.cpp
index 1215393b7..b21909ceb 100644
--- a/radio/src/bluetooth.cpp
+++ b/radio/src/bluetooth.cpp
@@ -47,7 +47,7 @@ void Bluetooth::write(const uint8_t * data, uint8_t length)
   TRACE_NOCRLF("BT>");
   for (int i=0; i<length; i++) {
     TRACE_NOCRLF(" %02X", data[i]);
-    if (btTxFifo.isFull()) {
+    while (btTxFifo.isFull()) {
       if (!bluetoothIsWriting())
         bluetoothWriteWakeup();
       RTOS_WAIT_MS(1);
@@ -491,13 +491,13 @@ uint8_t Bluetooth::bootloaderChecksum(uint8_t command, const uint8_t * data, uin
   return sum;
 }
 
-uint8_t Bluetooth::read(uint8_t * data, uint8_t size, uint8_t timeout)
+uint8_t Bluetooth::read(uint8_t * data, uint8_t size, uint32_t timeout)
 {
   watchdogSuspend(timeout / 10);
 
   uint8_t len = 0;
   while (len < size) {
-    uint8_t elapsed = 0;
+    uint32_t elapsed = 0;
     uint8_t byte;
     while (!btRxFifo.pop(byte)) {
       if (elapsed++ >= timeout) {
@@ -513,7 +513,7 @@ uint8_t Bluetooth::read(uint8_t * data, uint8_t size, uint8_t timeout)
 #define BLUETOOTH_ACK   0xCC
 #define BLUETOOTH_NACK  0x33
 
-const char * Bluetooth::bootloaderWaitCommandResponse(uint8_t timeout)
+const char * Bluetooth::bootloaderWaitCommandResponse(uint32_t timeout)
 {
   uint8_t response[2];
   if (read(response, sizeof(response), timeout) != sizeof(response)) {
diff --git a/radio/src/bluetooth.h b/radio/src/bluetooth.h
index 9229b720e..42c5abaa7 100644
--- a/radio/src/bluetooth.h
+++ b/radio/src/bluetooth.h
@@ -65,7 +65,7 @@ class Bluetooth
 
   protected:
     void pushByte(uint8_t byte);
-    uint8_t read(uint8_t * data, uint8_t size, uint8_t timeout=100/*ms*/);
+    uint8_t read(uint8_t * data, uint8_t size, uint32_t timeout=1000/*ms*/);
     void write(const uint8_t * data, uint8_t length);
     void appendTrainerByte(uint8_t data);
     void processTrainerFrame(const uint8_t * buffer);
@@ -76,7 +76,7 @@ class Bluetooth
     uint8_t bootloaderChecksum(uint8_t command, const uint8_t * data, uint8_t size);
     void bootloaderSendCommand(uint8_t command, const void *data = nullptr, uint8_t size = 0);
     void bootloaderSendCommandResponse(uint8_t response);
-    const char * bootloaderWaitCommandResponse(uint8_t timeout=100/*ms*/);
+    const char * bootloaderWaitCommandResponse(uint32_t timeout=1000/*ms*/);
     const char * bootloaderWaitResponseData(uint8_t *data, uint8_t size);
     const char * bootloaderSetAutoBaud();
     const char * bootloaderReadStatus(uint8_t &status);
diff --git a/radio/src/opentx.cpp b/radio/src/opentx.cpp
index 857bba8fb..cb184e2f6 100644
--- a/radio/src/opentx.cpp
+++ b/radio/src/opentx.cpp
@@ -1801,6 +1801,7 @@ void opentxInit()
     sdInit();
 
 #if defined(AUTOUPDATE)
+    sportStopSendByteLoop();
     if (f_stat(AUTOUPDATE_FILENAME, nullptr) == FR_OK) {
       FrSkyFirmwareInformation information;
       if (readFirmwareInformation(AUTOUPDATE_FILENAME, information) == nullptr) {
diff --git a/radio/src/targets/taranis/board.h b/radio/src/targets/taranis/board.h
index a1ef63652..07c128124 100644
--- a/radio/src/targets/taranis/board.h
+++ b/radio/src/targets/taranis/board.h
@@ -642,6 +642,7 @@ void telemetryPortSetDirectionInput(void);
 void telemetryPortSetDirectionOutput(void);
 void sportSendByte(uint8_t byte);
 void sportSendByteLoop(uint8_t byte);
+void sportStopSendByteLoop();
 void sportSendBuffer(const uint8_t * buffer, uint32_t count);
 uint8_t telemetryGetByte(uint8_t * byte);
 void telemetryClearFifo();
diff --git a/radio/src/targets/taranis/telemetry_driver.cpp b/radio/src/targets/taranis/telemetry_driver.cpp
index f46331bc0..ec6da0c86 100644
--- a/radio/src/targets/taranis/telemetry_driver.cpp
+++ b/radio/src/targets/taranis/telemetry_driver.cpp
@@ -103,6 +103,12 @@ void sportSendByte(uint8_t byte)
   USART_SendData(TELEMETRY_USART, byte);
 }
 
+void sportStopSendByteLoop()
+{
+  DMA_Cmd(TELEMETRY_DMA_Stream_TX, DISABLE);
+  DMA_DeInit(TELEMETRY_DMA_Stream_TX);
+}
+
 void sportSendByteLoop(uint8_t byte)
 {
   telemetryPortSetDirectionOutput();