Next steps?
I am not sure if there are some new pains like with TP-Links soldering-bridges... but how can I messure if things go well or not before? - I have no chance with TFTPD? - But how is that possible? The device worked great even with new flashings on both partitions. I had the the newest firmware without the "home-calling-features" from here: remove home-calling and after that I rebooted both partitions successfully. But then I wanted to implement in the newest firmware .399 wireguard like described in the other big topic here.
Unfortunately I didn't read to just install wireguard.ko. I installed all of the files completely into /lib/modules from the zip-file and it seems like I ended in a boot-loop.
But I think the uboot still has to work and don't know how to proceed properly now.
Would love to get help.
Before the crash I was really satisfied with the performance messurements. I saw around 600 Mbit/s up and down via my Huawei P20 to an Iperf3-Test and a long distance wifi-client setup with around 300 Mbit/s up and down. This was amazing for me. LAN<->WAN was able 940 Mbit/s up and down.
So all in all a very good device for my purpose, but now it's just crashed...