This was my experiment in creating a low power Arduino that can communicate wirelessly to a Raspberry Pi using an HC-12. By low power I mean run for a couple of years on a 18650 battery. Encryption should be unhackable by today’s standards.

I did a presentation for the Raspberry Pint group, the video is here.

The code is on my Github repo. I had to do some mods to the Arduino board to make it low power (removing the regulator and power LED resistor):