took the meson-gxbb-wetek-hub.dtb and renamed it to dtb.img and moved it to the root of the filesystem and rebooted and this worked
^ This step was completely unnecessary. With the mainline kernel-based versions, you no longer need to rename anything.
Anyway, that's not what's causing your problem...
Verify pinout --- above images are correct
I have my UART cable
The factory UART cable uses a 4-pin Jack. Although I suddenly don't remember the wiring, I also have a DIY version that I built.
But if you need it, I can measure the correct wiring when I'm home.
By the way, the WP2 uses a 2.5 mm jack, which is not compatible just because of its size.
edit: tried a bunch of different settings; switched RX and TX (reduced output); and even another UART device,
checked my wires for connectivity and shorts (all good); went to manufacturer's website to download new drivers ... no change
It's not a TTL-level thing, so it has to be connected directly to a serial port with a DB9 connector. Do not use an RS232-TTL converter.
Regardless, under LE11 the UART doesn't work on the Hub for some reason. I also only get static noise, and if the serial cable is plugged in, the image does not start. However, under LE 9.2 I can see everything on UART perfectly.
So, if you're testing an LE11 image, please don't use UART, the Jack connector should be empty.
Questions:
- Does the Hub logo appear on startup?
- If you put the SD card back in does it boot?