Adding a README

README

@@ -0,0 +1,5 @@
+Install the following packages on the Raspberry Pi:
+wiringpi
+
+Dragino User Manual:
+www.dragino.com/downloads/downloads/LoRa-GPS-HAT/LoRa_GPS_HAT_UserManual_v1.0.pdf

main.c

@@ -446,11 +446,6 @@ void txlora(byte *frame, byte datalen) {
 }
 
 int main (int argc, char *argv[]) {
-    /*
-    if (argc < 2) {
-        printf ("Usage: argv[0] sender|rec [message]\n");
-        exit(1);
-    }*/
 
     wiringPiSetup () ;
     pinMode(ssPin, OUTPUT);