onError callback

API.md

@@ -188,6 +188,25 @@ LoRa.receive(int size);
 
 The `onReceive` callback will be called when a packet is received.
 
+
+### onCrcError
+
+**WARNING**: onCrcError callback uses the interrupt pin on the `dio0`, check `setPins` function!
+
+#### Register callback
+
+Register a callback function for when a received packet failed CRC check.
+
+```arduino
+LoRa.onCrcError(onCrcError);
+
+void onCrcError() {
+ // ...
+}
+```
+
+The `onCrcError` - function to call when a received packet failed CRC check.
+
 ### Packet RSSI
 
 ```arduino

keywords.txt

@@ -32,6 +32,8 @@ flush	KEYWORD2
 
 onReceive	KEYWORD2
 onTxDone	KEYWORD2
+onCrcError KEYWORD2
+
 receive	KEYWORD2
 idle	KEYWORD2
 sleep	KEYWORD2

src/LoRa.cpp

@@ -71,7 +71,8 @@ LoRaClass::LoRaClass() :
   _packetIndex(0),
   _implicitHeaderMode(0),
   _onReceive(NULL),
-  _onTxDone(NULL)
+  _onTxDone(NULL),
+  _onCrcError(NULL)
 {
   // overide Stream timeout value
   setTimeout(0);
@@ -385,6 +386,23 @@ void LoRaClass::onTxDone(void(*callback)())
   }
 }
 
+void LoRaClass::onCrcError(void(*callback)()){
+	_onCrcError = callback;
+
+  if (callback) {
+    pinMode(_dio0, INPUT);
+#ifdef SPI_HAS_NOTUSINGINTERRUPT
+    SPI.usingInterrupt(digitalPinToInterrupt(_dio0));
+#endif
+    attachInterrupt(digitalPinToInterrupt(_dio0), LoRaClass::onDio0Rise, RISING);
+  } else {
+    detachInterrupt(digitalPinToInterrupt(_dio0));
+#ifdef SPI_HAS_NOTUSINGINTERRUPT
+    SPI.notUsingInterrupt(digitalPinToInterrupt(_dio0));
+#endif
+  }
+}	
+
 void LoRaClass::receive(int size)
 {
 
@@ -684,6 +702,10 @@ void LoRaClass::handleDio0Rise()
         _onTxDone();
       }
     }
+  } else {
+	  if (_onCrcError) {
+		_onCrcError();
+	  }	
   }
 }
 

src/LoRa.h

@@ -58,6 +58,7 @@ class LoRaClass : public Stream {
 #ifndef ARDUINO_SAMD_MKRWAN1300
   void onReceive(void(*callback)(int));
   void onTxDone(void(*callback)());
+  void onCrcError(void(*callback)());
 
   void receive(int size = 0);
 #endif
@@ -119,6 +120,7 @@ class LoRaClass : public Stream {
   int _implicitHeaderMode;
   void (*_onReceive)(int);
   void (*_onTxDone)();
+  void (*_onCrcError)();
 };
 
 extern LoRaClass LoRa;