Best posts made by Johannes Zellner

@Zheng-Han : you're my hero! I just restored my bricked omega by connecting it via ethernet with a second omega. I built the network connection beween the two omegas just exactly as you suggested on a breadboard and it worked out of the box. Thanks a lot!

Here are the necessary steps after wiring the network connection:

• boot the good omega -- let's call it omega-good
• connect the bricked omega (omega-bricked) with an USB cable with a linux pc (expansion switch still off)
• connect to omega-bricked with screen /dev/ttyUSB0 115200
• power on the switch of the expansion board of omega-bricked and immediately hit enter in the screen session to get into uboot on omega-bricked
• printenv in uboot on omega-bricked shows that the ethernet ip is configured to be 192.168.1.1
• configure the ethernet connection of omega-good to use the static ip 192.168.1.100, either by modifying /etc/config/network and restarting the network or by something like ifconfig eth0 192.168.1.100 up
• from uboot in omega-bricked verify with ping 192.168.1.100 that the network connection to omega-good works
• from uboot in omega-bricked start httpd
• create ssh tunnel from the linux pc to omega-bricked via omega-good with ssh -L 8080:192.168.1.1:80 omega-good (ssh connection to omega-good is via wifi)
• open http://localhost:8080/ in a browser on the linux pc. The ssh tunnel redirects this to the httpd of omega-bricked → you see the uboot httpd upgrade page in your browser and can proceed to upload a bin image.

yeah, creating an ethernet connection does also work with one omega and half of the circuit diagram in https://community.onion.io/topic/130/debrick-with-serial

Hi,

it seems that I bricked my omega while upgrading.
Is there a way I can debrick with a serial connection?
I already managed to get into uboot with a serial terminal, but I don't know what do do next w/o ethernet expansion.

If it's not possible w/o ethernet expansion:
Can I just connect the four omega pins rx-, rx+, tx-, tx+ to the corresponding pins of an ethernet cable to get an ethernet connection?

@Lazar-Demin thanks, works nicely.

@Karan-Magdani this ssems to be a common problem unfortunatley. I also broke one.
You can still switch it with something sharp as a needle or a knife.
I left mine in the state on and power off and on by connecting and disconnecting from the power supply.