I want to make a gsm vehicle security device using sim900 module, and preferably arm microcontroller the device will be simple and have basic functions such as
1. location through cell tower id
2. engine on off through sms
3. 2-3 input output for sensor
4. In built battery, and reverse polarity protection
All the components should be easily available in India Local market, Low cost and of good quality.
In this project provide Schematics, BOM and datasheets of the components.