The Wevolor device connects to the WiFi and controls Levolor blinds and shades. It's software running on en ESP32 device and allows control from IFTTT, Amazon Alexa, Google Home etc.
Two users have Wevolor devices and got them to work - not without some effort fair to say, but good testing done, and some improvements in the pipeline. Thanks to Scott and Dacy for helping me out. One I sent a device pre-loaded, and one the user bought his own device and loaded the software.