This project allows you to control an LED (or any other device) remotely using SMS commands via the SIM800C GSM module. The code is designed to turn an LED on or off based on the content of received ...

GPS Tracker Project with ESP8266, NEO-6M, SIM800C, and Arduino Uno This repository contains the documentation and instructions for building a GPS tracker using an ESP8266, NEO-6M GPS module, SIM800C ...

arduino gsm security alarm. ... // RX and TX pins to communicate with GSM module #define msg_key 7 #define call_key 8 #define end_key 9 String number ="0000000000"; // Add the 10-Digit Mobile Number ...

He didn’t sell his clients Arduinos + shields I hope. The SIM548C is a pretty cheap GPS+GSM/GPRS combo as well. Comes in SMT versions as well, and can be really cheap depending on how much ...