Hello,
Did You try to clean all the configuration files within failsafe mode or using the -n flag with sysupgrade? (beware: this will remove all files and installed packages from the omega).

I've had a similar issue, when I didn't deliver enough power to my Omega2+. After I've attached two 47 µF capacitors in parallel to the 3.3V rail the issue disappeared, but I wasn't using a proper extension board! This probably isn't related to Your issue after all

Hello and good morning,
I am developing an IoT project for my diploma (engineering exam here in Poland). So far so good, I've already completed the designs and so forth, but after three days of analyzing and head-banging I found out that the SoC probably has a silicon failure manufactured in, that prevents the full-duplex SPI transmission to occur.

I know there is the FAQ post already, but my project features those small nRF24L01 modules and without the SPI communication, I need to take a huge step back and recreate my whole "base" part. I attach a photo of my custom extension board I've designed for my IoT project.

I'm a bit disappointed that nobody ever mentioned this issue on the product specification nor at the MediaTek SoC datasheet. Are all of the onion omega2 (plus or non) affected and MediaTek didn't fix the issue? What about the new Omega2 Pro's and Omega2S?

What could I do, to provide a full-duplex communication for the radio module even with the SoC issue? (It needs to be low level; preferable in C).

Thanks in advance for all responses.

Best regards,
Tomasz