diff --git a/IO.cpp b/IO.cpp
index ea69377..9df584c 100644
--- a/IO.cpp
+++ b/IO.cpp
@@ -336,6 +336,11 @@ void CIO::resetWatchdog()
   m_watchdog = 0U;
 }
 
+uint32_t CIO::getWatchdog()
+{
+  return m_watchdog;
+}
+
 bool CIO::hasLockout() const
 {
   return m_lockout;
diff --git a/IO.h b/IO.h
index ba7bbfa..1dba4a4 100644
--- a/IO.h
+++ b/IO.h
@@ -52,6 +52,7 @@ public:
   bool hasLockout() const;
 
   void resetWatchdog();
+  uint32_t getWatchdog();
 
 private:
   bool                 m_started;
diff --git a/IOSTM.cpp b/IOSTM.cpp
index 56826bb..f02c347 100644
--- a/IOSTM.cpp
+++ b/IOSTM.cpp
@@ -355,7 +355,7 @@ void CIO::initInt()
 {
    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_StructInit(&GPIO_InitStruct);
-   GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
+   GPIO_InitStruct.GPIO_Speed = GPIO_Fast_Speed;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_PuPd  = GPIO_PuPd_DOWN;
 
diff --git a/SerialPort.cpp b/SerialPort.cpp
index 235257d..c012ab0 100644
--- a/SerialPort.cpp
+++ b/SerialPort.cpp
@@ -422,6 +422,9 @@ void CSerialPort::process()
         m_buffer[0U] = c;
         m_ptr = 1U;
         m_len = 0U;
+      } else {
+        m_ptr = 0U;
+        m_len = 0U;
       }
     } else if (m_ptr == 1U) {
       // Handle the frame length
@@ -647,9 +650,9 @@ void CSerialPort::process()
 
 #if defined(SERIAL_REPEATER)
           case MMDVM_SERIAL: {
-				for (uint8_t i = 3U; i < m_len; i++)
-					m_repeat.put(m_buffer[i]);
-			}
+            for (uint8_t i = 3U; i < m_len; i++)
+              m_repeat.put(m_buffer[i]);
+            }
             break;
 #endif
 
@@ -665,23 +668,28 @@ void CSerialPort::process()
     }
   }
 
+  if (io.getWatchdog() >= 48000U) {
+    m_ptr = 0U;
+    m_len = 0U;
+  }
+
 #if defined(SERIAL_REPEATER)
-	// Write any outgoing serial data
-	uint16_t space = m_repeat.getData();
-	if (space > 0U) {
-		int avail = availableForWriteInt(3U);
-		if (avail < space)
-			space = avail;
+  // Write any outgoing serial data
+  uint16_t space = m_repeat.getData();
+  if (space > 0U) {
+    int avail = availableForWriteInt(3U);
+     if (avail < space)
+      space = avail;
 
-		for (uint16_t i = 0U; i < space; i++) {
-			uint8_t c = m_repeat.get();
-			writeInt(3U, &c, 1U);
-		}
-	}
+    for (uint16_t i = 0U; i < space; i++) {
+      uint8_t c = m_repeat.get();
+      writeInt(3U, &c, 1U);
+    }
+  }
 
-	// Read any incoming serial data
-	while (availableInt(3U))
-		readInt(3U);
+  // Read any incoming serial data
+  while (availableInt(3U))
+    readInt(3U);
 #endif
 }
 
diff --git a/SerialSTM.cpp b/SerialSTM.cpp
index e2b128e..263c034 100644
--- a/SerialSTM.cpp
+++ b/SerialSTM.cpp
@@ -184,7 +184,7 @@ void InitUSART1(int speed)
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_9 | GPIO_Pin_10; //  Tx | Rx
-   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+   GPIO_InitStructure.GPIO_Speed = GPIO_Fast_Speed;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
 
    // Configure USART baud rate
@@ -375,7 +375,7 @@ void InitUSART2(int speed)
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_2 | GPIO_Pin_3; //  Tx | Rx
-   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+   GPIO_InitStructure.GPIO_Speed = GPIO_Fast_Speed;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
 
    // Configure USART baud rate
@@ -566,7 +566,7 @@ void InitUSART3(int speed)
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_10 | GPIO_Pin_11; //  Tx | Rx
-   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+   GPIO_InitStructure.GPIO_Speed = GPIO_Fast_Speed;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
 
    // Configure USART baud rate
@@ -758,7 +758,7 @@ void InitUART5(int speed)
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_12; //  Tx
-   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+   GPIO_InitStructure.GPIO_Speed = GPIO_Fast_Speed;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
 
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_2; //  Rx