Battery discharge calculator

This is a simple script that will calculate the discharge curve of a battery. It does this by communicating with a flight controller running INAV (with calibrated voltage and current sensors) with a constant load attached.

It reads the voltage, instant amperage, and Ah consumed, and writes the samples to a CSV file for later plotting.

Installation

Use pipx:

$ pipx install assault_and_battery

And run the script as:

$ assault --help

Usage

Plug an FC with calibrated sensors to USB, making sure to either cut the VCC cable (or put some tape over the VCC pin), or use Bluetooth, USB-Serial, or some other way that doesn't power the FC. Also make sure to not have any ground loops.

Then, run the script and start your load. It will output a CSV file with the current date and all the measurements.

To plot stuff, use assault plot <csv file>. You can delete the first few values if the load hasn't ramped up, or if you want to get rid of starting noise. This will produce a graph, that's about it.