I’m doing a project on a GPS vehicle tracking device. I just got a SIM808 https://www.elecrow.com/wiki/index.php?title=SIM808_GPRS/GSM%2BGPS_Shield_v1.1
I’ve been using the code at https://www.cooking-hacks.com/projects/arduino-realtime-gps-gprs-vehicle-tracking/ and I have this problem. All I get is AT AT AT AT.
I don’t know what do to do now.