Components Required:

1. Arduino Uno

2. Linux PC/Windows PC (Tested with Windows 10, Ubuntu 14.04 LTS)

3. USB cable A to B

4. SIM900A GSM Modem / SIM800L GSM Module

5. 12V 1A Adapter (if you are using SIM900A GSM Modem)

6. SIM Card

7. Jumper Wires

Way to go ->

1. Connect Arduino Uno to PC via the USB cable.

2. Upload SMS.ino to the Arduino.

SMS.ino

4. In the empty box at the top of the serial monitor type -> s, and click Send to send an SMS.

SerialSMS

SMS

Hardware Connections ->

1. GSM Module to Arduino Uno

GSM_schem

GSM_bb