esptool cannot connect to HiLetgo® ESP-WROOM-32

[lamikam]

Just got the board. When I connect to it through usb/serial terminal app, on board startup, it appears to continually be scanning for wifi points:

scan start
scan done
2 networks found
1: Nobody Close (-49)*
2: Nobody Close_2GEXT (-74)*

This never seems to end. When I try to erase the flash with esptool:
esptool.py --chip esp32 --port COM3 --baud 115200 erase_flash

just get a timeout eventually. Any suggestion

[yeyeto2788]

Hello @lamikan,

I guess that the problem you're having is the baud rate you're to connect to the board, as I can see you are trying with

Code: Select all

115200 

please try with

Code: Select all

 esptool.py --chip esp32 --port <your device port> --baud 460800  erase_flash

.

Another thing I strongly recommend is upgrade the esptool if you haven't done it yet.

I tried the command I post above with the esptool v2.4.1 and it worked like a charm.

Hope it helps


Regards.

[liudr]

Can you provide a link to the board you purchased? If nothing works, maybe we can look at the sales page and find a circuit diagram. Sometimes it could be the manufacturing wasn't perfect and you have a few disconnected pins. Does your board look good on closeup inspection?