Back in 2015 there was a popular USB power meter made by YZX Studio. I bought a Red one from Franky on eBay a long time ago. It seems there was a firmware update available, as shown in this video by Julien Ilett:
Does anyone still have the firmware, or any other information about this tool? Even the original documents in Chinese would be fine, I can have a friend translate it for me.
I emailed Franky yesterday but have not heard back yet. Thought I would check with the people here.
Thanks,
-Farrell