• I've determined with certainty it's a flaky board (what do you expect for $7?).

    If I have contact with the area of the board where the CP2102 USB/serial chip is (but not just contact with that IC), it runs fine. As soon as I take my hand away, it get's stuck somehow and the WDT fires.

    I can even carefully take the board on the end of the USB cable and carefully put it under my shirt against my stomach, carefully remove my thumb from the "magic" area, and then use both hands to interact with it in the IDE. Pull it away from my body, same crash.

    So, it's capacitive coupling of some sort due to seven dollar manufacturing. Got a few more ESP12E variants on the way, as well as a dozen raw 12E SMD boards (couldn't pass up $1.50 each w/free shipping on eBay), so I'll confirm shortly that it's what I think it is.

    Until then, I have my Pico to work with, solid as a rock.

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