Issue #879 - Revert changes from commit 9254748

The MacCtx.ChannelsNbTransCounter must be reset to 0, otherwise the next data
 transmission will be treated as a re-transmission which leads
to a decrement of the frame counter.

Author: Daniel Jaeckle

src/mac/LoRaMac.c

@@ -1620,9 +1620,16 @@ static void LoRaMacHandleMlmeRequest( void )
     // Handle join request
     if( MacCtx.MacFlags.Bits.MlmeReq == 1 )
     {
-        if( ( LoRaMacConfirmQueueIsCmdActive( MLME_JOIN ) == true ) ||
-            ( LoRaMacConfirmQueueIsCmdActive( MLME_TXCW ) == true ) ||
-            ( LoRaMacConfirmQueueIsCmdActive( MLME_TXCW_1 ) == true ) )
+        if( LoRaMacConfirmQueueIsCmdActive( MLME_JOIN ) == true )
+        {
+            if( LoRaMacConfirmQueueGetStatus( MLME_JOIN ) == LORAMAC_EVENT_INFO_STATUS_OK )
+            {// Node joined successfully
+                MacCtx.ChannelsNbTransCounter = 0;
+            }
+            MacCtx.MacState &= ~LORAMAC_TX_RUNNING;
+        }
+        else if( ( LoRaMacConfirmQueueIsCmdActive( MLME_TXCW ) == true ) ||
+                 ( LoRaMacConfirmQueueIsCmdActive( MLME_TXCW_1 ) == true ) )
         {
             MacCtx.MacState &= ~LORAMAC_TX_RUNNING;
         }