ROBOT.LK

See the sample codes below that can be used for SIM900 with Arduino.

Sample code to take a call using SIM900 and Arduino

Sample code to send SMS using SIM900 and Arduino

Sample code to receive SMS using SIM900 and Arduino

Sample code to FTP upload/download using SIM900 and Arduino

Sample code TCP/UDP network using SIM900 and Arduino

Sample code to HTTP using SIM900 and Arduino