I’ve tried localtuya. It is a bit unfriendly. It finds the dehumidifier, then you can add various properties of the dehumidifier. Once you are done, you can edit and remove the existing ones, but you cannot add a new one (except by removing the whole device and adding it again). You cannot change the property type. The properties are just numbered, without any explanation. I’ve experimented a bit. This is my best guess:
1 – switch
2 – mode: 0-normal, 1=continuous, 2=strong, 3=dry clothes
4 – target humidity
5 – uv
6 – fan speed: 1=low, 3=high (value 2 is unused for my model)
7 – child_lock
11 – status; 0 = OK, 8 = tank full or missing
12 – timer
102 – sleep mode
103 – temperature
104 – humidity
101 – related to timer (don't know exactly)
105 – defrost
I expected the items to be mapped to the official documentation at Standard Instruction Set-Tuya IoT Development Platform-Tuya Developer . However, it is not that easy. Some items from the official documentation are apparently not supported (e.g., medium fan speed), some aren’t documented (e.g. dry clothes). The documentation still might give someone a hint, though.
EDIT summary: edited description of 101 and 105 based on later findings.