SCM does not boot after change to config.txt

Secure Compute Module
1

Hi.

Issue and potentially useful information.

I changed the config.txt file of the SCM, more precicely I commented out the line

dtoverlay=dwc2,dr_mode=host

in both the [cm4] and [cm5] section. After restarting the device, I get constant rapid blinking.

The following error message is visible

5-imageonline.co-merged
5-imageonline.co-merged704×2296 414 KB

Other information

  • I use the waveshare CM4-IO-WIRELESS-BASE for my SCM
  • I tried it out with a power supply with 5V 3A and 12V 5A. Both returned the same messages and generally have the same behavior.
  • Unfortunately, I did not read the documentation before and did not update the manifest.

Questions.

  • I can’t interact with the SCM currently. When I plug in a keyboard, I can’t fix anything. Is there a way for me to change the config.txt?
  • Should I have rehashed the config.txt?
  • How to fix this issue? It would be nice, if I could access the config.txt somehow; I am not sure whether it is possible.

Thanks in advance :smiley:

2

I got a response from the support. Maybe it will be of use to someone else here.

It is not possible to modify the config.txt anylonger. It is no longer possible to recover that device if it does not boot up. This has something to do with the security mechanisms that have been implemented.