In this tutorial we’re going to show you how you can control a 12V lamp via SMS using an Arduino UNO, a relay module, and the SIM900 GSM shield. Before proceeding with this tutorial we recommend the following resources: Guide for Relay Module with Arduino; Guide to SIM900 GSM GPRS Shield with Arduino; First, watch the video demonstration
GSM Test GPRS. This sketch tests the GPRS data connection on the GSM shield. It tries to connect to arduino.cc. To use a data connection with the GSM shield, you'll need your provider's Access Point Name (APN), login, and password.Shop GPRS Shield V3.0 at Seeed Studio, offering wide selection of electronic modules for makers to DIY projects. Quality Guarantees. Lifetime Tech Support. Full Tutorials and Projects.