This is a GSM alarm system based on the Arduino Nano and SIM800L boards.
This project is designed for maximum autonomous working time e.g. powered by the 18650
battery. When the system is in IDLE mode, it 'sleeps' and wakes up when the interrupt on pin 3
is triggered.
If you want to get maximum performance, de-solder the led's from the arduino board and disable the voltage regulator.
- Solder all components together (note that the
SIM800L
board works between3.7V
and4.2V
, and the interrupt pins on the Arduino Nano are2, 3
). - Edit the values in the
#define
statements at the top of the sketch (phone number, interrupt pins, timeouts). - Put the libraries from the
libraries
project directpry in theC:\Program Files (x86)\Arduino\libraries
directory. - Compile, upload and enjoy.