Hey, if you are still looking for a way to get the Treatlife DS03 working with Hubitat, I have created a driver for it here:
https://community.hubitat.com/t/treatlife-fan-and-dimmer-tasmota-httphook-driver/
To get it working, I had to port Markus' HttpHook to Tasmota 9.3.1.1. So you would have to install a firmware I provide.
