Mesh (Argon/Xenon) detecting USB power loss

[ScruffR]

The Boron uses a dedicated fuel gauge (which Argon and Xenon lack) and a special charging controler (the same PMIC as on Electron) which should be used instead.

Hence you could try the way it would be done with the Electron

When is Electron Powered By Battery

This is a deceptively difficult thing to detect. I’m not sure the method here is the best way to do it, but this is the first method I’ve found that actually produces the correct result, so there is that. I believe the problem is that when there’s no battery, the PMIC doesn’t go into some easy-to-read no battery state. It rapidly switches between fast charging and charge complete states, continuously. it’s possible to detect this, and this sample code breaks out three things that are sort of u…