[Solved] Flashing OpenBeken Firmware on Tuya T34 WLAN Plug: Success Stories and Issues?

Hello,

does anyone have any experience of flashing Openbeken or similar to a Tuya T34?
https://developer.tuya.com/en/docs/iot/t34-module-datasheet?id=Ka0l4h5zvg6j8

I found the T34 in this WLAN plug:
https://de.aliexpress.com/item/1005006777059625.html

I found something myself:
https://www.elektroda.com/rtvforum/topic4042412.html

LG