- Sat Jul 17, 2021 8:52 pm
What happens when you feed the batteries directly to the 5V input on pin 1 (marked "VIN" or "VDDUSB"): with the USB port pointing to the right, the very first pin at the bottom right (the one next to it, pin 2, is ground)?
It might just work, but the on-board LDO has a drop of around 350mV, so as the batteries get depleted, it might not be enough anymore to power the board.
I would get my hands on a Wemos D1 with a battery shield
and a LiPo battery if possible; it would make thing far more easy and reliable (I guess).
Assumption is the mother of all f*ckups. At least: that's what I'm assuming.