diff --git a/DCCEXParser.cpp b/DCCEXParser.cpp
index d35db0b..5dcce10 100644
--- a/DCCEXParser.cpp
+++ b/DCCEXParser.cpp
@@ -492,10 +492,10 @@ void DCCEXParser::parse(Print *stream, byte *com, RingStream * ringStream)
         return;
 
     case '+': // Complex Wifi interface command (not usual parse)
-        if (atCommandCallback) {
+        if (atCommandCallback && !ringStream) {
           DCCWaveform::mainTrack.setPowerMode(POWERMODE::OFF);
           DCCWaveform::progTrack.setPowerMode(POWERMODE::OFF);
-          atCommandCallback(com);
+          atCommandCallback(stream,com);
           return;
         }
         break;
diff --git a/DCCEXParser.h b/DCCEXParser.h
index 3d376b2..f8724fe 100644
--- a/DCCEXParser.h
+++ b/DCCEXParser.h
@@ -23,7 +23,7 @@
 #include "RingStream.h"
 
 typedef void (*FILTER_CALLBACK)(Print * stream, byte & opcode, byte & paramCount, int16_t p[]);
-typedef void (*AT_COMMAND_CALLBACK)(const byte * command);
+typedef void (*AT_COMMAND_CALLBACK)(Print * stream,const byte * command);
 
 struct DCCEXParser
 {
diff --git a/RMFT2.cpp b/RMFT2.cpp
index dc0568e..44c1c32 100644
--- a/RMFT2.cpp
+++ b/RMFT2.cpp
@@ -757,6 +757,7 @@ void RMFT2::loop2() {
 
     case OPCODE_UNJOIN:
        DCC::setProgTrackSyncMain(false);
+       CommandDistributor::broadcastPower();
        break;
        
     case OPCODE_READ_LOCO1: // READ_LOCO is implemented as 2 separate opcodes
diff --git a/WifiInterface.cpp b/WifiInterface.cpp
index 24ca77d..6b3e3b8 100644
--- a/WifiInterface.cpp
+++ b/WifiInterface.cpp
@@ -316,12 +316,38 @@ wifiSerialState WifiInterface::setup2(const FSH* SSid, const FSH* password,
 
 
 // This function is used to allow users to enter <+ commands> through the DCCEXParser
+// <+command>  sends AT+command to the ES and returns to the caller.
 // Once the user has made whatever changes to the AT commands, a <+X> command can be used
 // to force on the connectd flag so that the loop will start picking up wifi traffic.
 // If the settings are corrupted <+RST> will clear this and then you must restart the arduino.
+
+// Using the <+> command with no command string causes the code to enter an echo loop so that all
+// input is directed to the ES and all ES output written to the USB Serial.
+// The sequence "!!!" returns the Arduino to the normal loop mode
+
  
-void WifiInterface::ATCommand(const byte * command) {
+void WifiInterface::ATCommand(HardwareSerial * stream,const byte * command) {
   command++;
+  if (*command=='\0') { // User gave <+> command  
+      stream->print(F("\nES AT command passthrough mode, use ! to exit\n"));
+     while(stream->available()) stream->read(); // Drain serial input first 
+     bool startOfLine=true;
+     while(true) {
+      while (wifiStream->available()) stream->write(wifiStream->read());
+      if (stream->available()) {
+        int cx=stream->read();
+        // A newline followed by !!! is an exit
+        if (cx=='\n' || cx=='\r') startOfLine=true; 
+        else if (startOfLine && cx=='!')  break;
+        else startOfLine=false; 
+        stream->write(cx);
+        wifiStream->write(cx);  
+       }
+     }
+     stream->print(F("Passthrough Ended"));
+     return; 
+  }
+  
   if (*command=='X') {
      connected = true;
      DIAG(F("++++++ Wifi Connction forced on ++++++++"));
diff --git a/WifiInterface.h b/WifiInterface.h
index 19f8a3a..8d77ab8 100644
--- a/WifiInterface.h
+++ b/WifiInterface.h
@@ -37,7 +37,7 @@ public:
                           const int port,
                           const byte channel);
   static void loop();
-  static void ATCommand(const byte *command);
+  static void ATCommand(HardwareSerial * stream,const byte *command);
   
 private:
   static wifiSerialState setup(Stream &setupStream, const FSH *SSSid, const FSH *password,