I started to setup the GPS Tracker.

Some functions has been tested: GPS and GPRS connection, with a simple API request, and call and SMS, all working.

Here’s the top level diagram, following more details and code.

While soldering I changed my mind about the schematics:

• use a Oled screen instead of leds
• reduce wiring and handle all with software
• use the ground as switch. Ground is regulated by the board and does not require resistors.