ESP32-S2 reboots when WiFi is used

[Aditya Kumar]

Hi,
I confirm that some S2 Mini clone boards have a routing problem on the C14 ground pad.
After several hours of investigation (and one jeopardized board) the fix is straightforward.
Scratch the ground plane a put a blob between the C14 cap and the ground plane. See attachment.

The WiFi is now rock solid and stable, this make a huge difference.

Cheers.

hi even after adding the blob mine have same issue

[beachmiles]

Hi,
I confirm that some S2 Mini clone boards have a routing problem on the C14 ground pad.
After several hours of investigation (and one jeopardized board) the fix is straightforward.
Scratch the ground plane a put a blob between the C14 cap and the ground plane. See attachment.

The WiFi is now rock solid and stable, this make a huge difference.

Cheers.

hi even after adding the blob mine have same issue

This fix didn't work for me either. I added a larger cap between en and ground by the RST switch which did work.
I verified that the EN line voltage was very choppy before this mod using a scope, afterwords it was smooth and no more random resets while using wifi.
https://esp32.com/viewtopic.php?f=19&t= ... 10#p106290

[Basalt]

I confirm that some S2 Mini clone boards have a routing problem on the C14 ground pad.
[...]
Scratch the ground plane a put a blob between the C14 cap and the ground plane. See attachment.

The photo in this post seems to show more bad solder joints.
Resoldering them might help, or simply buy another board.