I've been lurking for a while, first time poster.
I have an issue that seems unusual. I have a few 8266 boards around the place, some NodeMCU and some D1.
All of them (but one that I killed in a 5v vs 3.3v incident), I connected them to my rpi, would check that AT commands work, flash micropython binaries, connect to serial tty, connect them to wifi and enable webrepl. All done the same way in a few minutes without issues.
But today I received four more D1 mini (v3.0) and so far, three out of the four seem to have the same issue (I left one sealed in its bag). When I connect them, I don't see the AP essid from my computer nor my phone. When I log in them, everything works fine, but if I enable STA and do a scan (AT+CWLAP), I don't see the list of wifi, but only "OK".
I installed micropython on two of them and same behaviour. But now, when I scan for wifi, I get :
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>>> sta.active(True)
#6 ets_task(4020f560, 28, 3fff9ed0, 10)
>>> sta.scan()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OSError: scan failed
Thank you very much,
S
EDIT: I'm flashing
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esp8266-20200911-v1.13.bin