ITech IT8512 Python Library
The Itech IT8512 is a programmable DC electronic load.
It seems to be an exact copy of the BK precision 8500
It has a serial port for remote control and monitoring, and some windows software.
Luckily the 8500 comes with a python library! The library is available with an MIT license from the link above.
This repo contains a slightly modified version of the client to work with linux systems.
It also contains a script I wrote to do battery testing with CSV logging. The BK software package comes with a more in depth demonstration and a decent PDF.