I have a WeMos D1 R2 that I am using again after a few years.
Using B4R 2.51 I'm seeing some strange stuff - sometimes it does not run, then all of a sudden works as expected; log output has garbage characters, then suddenly works; sending UDP I get random resets.
One guess is the the USB on my laptop is not providing enough power.
I seem to remember from years ago that I had an external power supply connected to the board (at circled connector).
I cannot find any manual or documentation online to confirm this is a power connector. I don't trust my memory enough to risk frying the board.
Can anyone confirm this is a power connector and providing external power may help with the errors I am seeing.
Thanks,
Barry.