MicroPython Forum (Archive)

Hi, I had a similar issue with an ESP32-S2, maybe this thread will help ?

Apologies for the late response. Last week was so busy. Sorry, I was suggesting that the firmware might be telling us something - a lack of testing perhaps? Oh, my mistake, I agree, the more testing the better, especially in light of the REPL not appearing on the UART port after flashing. I tested o...

With a USB interface on GPIO19 and 20 would I be able to flash firmware on that port? I tried to flash firmware via GPIO19/20 and it works but the REPL still doesn't come up on the ESP-IDF interface, even after hard reset. It comes up as a COM port which you can connect to with a terminal applicati...

I definitely agree, like you said, you would expect the REPL to appear on the same interface you flashed on or at least an indicator of where it has moved to.

Made me question a few life choices

If you could raise a ticket please, that would be great!
I think you carry more sway

I think the problem is that GPIO19 and 20 are not connected to the micro USB port because R2, R3, C4 and C5 are not populated. I think that the USB bridge is communicating the on USB_DP and USB_DN lines and the USB-OTG is communicating on GPIO 19 and 20. If this is the case then I think the fix woul...

Are we being told something by the fact that the firmware doesn't actually work properly? No innuendo from my side, I was just noting that it's odd, because so far everything that I have used in MicroPython v1.18 on the S2 has worked without hassle. Figuring out the REPL took a bit of time, but onc...

It's GPIO 19 (USB_D+) and 20(USB_D-), those are the pins that I have used on a board in development, which work.

Have a look at the ESP32-S2-MINI-1 & ESP32-S2-MINI-1U Datasheet in section 6, the schematic shows the OTG port connected to GPIO19 and 20.

I also had this problem, the REPL becomes available on the USB-OTG port after flashing.

Thanks for the effort. So I tried your suggestion, I used the official mqtt-simple library and made the appropriate changes to the "example_pub.py" file. I published to the topic using the WROOM dev board and it worked fine. from mqtt.simple import MQTTClient import time # Test reception e.g. with: ...

It does maintain WiFi links with no problems so far, that being said I haven't really done much besides pinging google to check that I have internet access (which I do).