Add log message when a packet is received

src/main.cpp

@@ -105,6 +105,8 @@ void loop() {
 }
 
 void processPacket(const Packet *packet) {
+  Serial.println("Got a packet");
+
   // Update last rolling codes each time a packet from a real hub is detected
   if (packet->source == 0x0000) {
     lastRollingCode1 = packet->rollingCode1;