Apr 19, 2018 · Interfacing GSM module with Arduino. This is a tutorial for beginners, for working demonstration we will be sending an SMS to a particular mobile number when a switch is pressed. GSM module connected via TTL UART interface. Wiring – Connecting SIM800L GSM module to Arduino UNO. Now that we know everything about the module, we can begin hooking it up to our Arduino! Start by soldering/connecting the antenna, insert fully activated Micro SIM card in the socket.
Interfacing GSM SIM900A with Arduino: SIM900A is an ultra-compact and reliable wireless module. The SIM900A is a complete Dual-band GSM/GPRS solution in a SMT module which can be embedded in the customer applications.