@malwar You need to parse the packets per the spec document. I started on a Python script to do some testing. Its incomplete but might help you as it shows how to parse + pack frames for comms with the yc1175.
When you first start up the system, yc1175 is pinging waiting for a response of firmware version. You may need to respond to this before it will accept commands to control indicator.
Eventually I will make a custom HA integration to control indicators and receive button events, but for now still working on getting HAOS working nicely. Its certainly possible to do all this in nodered as well, but I have no intention of working on that.