diff --git a/src/LoRaWan.cpp b/src/LoRaWan.cpp
index e5940721..409dabf2 100644
--- a/src/LoRaWan.cpp
+++ b/src/LoRaWan.cpp
@@ -416,6 +416,25 @@ bool LoRaWanClass::transferPacketWithConfirmed(unsigned char *buffer, unsigned c
       return false;
 }
 
+bool LoRaWanClass::transferPacketLinkCheckReq(unsigned char timeout)
+{
+    while(SerialLoRa.available())SerialLoRa.read();
+    
+    sendCommand("AT+MSG\r\n");
+    
+    memset(_buffer, 0, BEFFER_LENGTH_MAX);
+    readBuffer(_buffer, BEFFER_LENGTH_MAX, timeout);
+#if _DEBUG_SERIAL_    
+    SerialUSB.print(_buffer);
+#endif
+    dutycycle = false;
+    if(strstr(_buffer, "+MSG: No band")){
+    dutycycle = true;
+    } 
+    if(strstr(_buffer, "+MSG: Done"))return true;
+    return false;
+}
+
 short LoRaWanClass::receivePacket(char *buffer, short length, short *rssi)
 {
     char *ptr;
@@ -1042,4 +1061,4 @@ short LoRaWanClass::sendCommandAndWaitForResponse(char* command, char *response,
 }
 
 
-LoRaWanClass lora;
\ No newline at end of file
+LoRaWanClass lora;
diff --git a/src/LoRaWan.h b/src/LoRaWan.h
index fa492ab4..8dc6182d 100644
--- a/src/LoRaWan.h
+++ b/src/LoRaWan.h
@@ -271,7 +271,12 @@ class LoRaWanClass
          *  \return Return bool. Ture : Confirmed ACK, false : Confirmed NOT ACK
          */
         bool transferPacketWithConfirmed(unsigned char *buffer, unsigned char length, unsigned char timeout = DEFAULT_TIMEOUT);
-
+        /**
+         *  \brief Perform a LinkCheck request
+         *
+         *  \return Return bool. True : Confirmed ACK, false : Confirmed NOT ACK
+         */
+        bool transferPacketLinkCheckReq(unsigned char timeout = DEFAULT_TIMEOUT);
         /**
          *  \brief Receive the data
          *
@@ -498,4 +503,4 @@ class LoRaWanClass
 extern LoRaWanClass lora;
 
 
-#endif
\ No newline at end of file
+#endif