Add _resetCurrentSentenceOnBusError

Author: PaulZC

src/u-blox_GNSS.cpp

@@ -1153,7 +1153,12 @@ bool DevUBLOXGNSS::checkUbloxI2C(ubxPacket *incomingUBX, uint8_t requestedClass,
         }
       }
       else
-        return (false); // Sensor did not respond
+      {
+        //Something has gone very wrong. Sensor did not respond - or a bus error happened...
+        if (_resetCurrentSentenceOnBusError)
+          currentSentence = SFE_UBLOX_SENTENCE_TYPE_NONE; //Reset the sentence to being looking for a new start char
+        return (false);
+      }
 
       bytesAvailable -= bytesToRead;
     }

src/u-blox_GNSS.h

@@ -1530,6 +1530,10 @@ class DevUBLOXGNSS
   size_t _autoSendAtSpaceRemaining = 0;
 
 public:
+
+  //Flag to indicate if currentSentence should be reset on a (I2C) bus error
+  bool _resetCurrentSentenceOnBusError = true;
+
   typedef union
   {
     uint64_t unsigned64;