Some picture of the work in progress of the sensor, I should be able to keep it compact.

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.

The Water sensor is under development and I am trying to create as compact as possible circuit, using surface mount resistor and tiny leds (~ 2mm x 5mm)

The picture with the red arrow it show on left the old sensor and on right the new one.

Leds, Bluetooth module and the Arduino controller they should be fit in the same breadboard.