The PiVoyager is UPS for the Raspberry Pi designed to work with standard Li-Ion or LiPo batteries, featuring a programmable watchdog, automatic restart, and a real-time calendar. The PiVoyager is designed as a Pi Zero pHAT, but works on any Raspberry-Pi with a 40 pin header, including the Raspberry Pi 3B+ and 4.
This repository provides the source code of the command line utility used on a Raspberry Pi to control the PiVoyageri hardware.
For more info on the PiVoyager please see: https://www.omzlo.com/articles/pivoyager-the-smart-ups-for-the-raspberry-pi