Support for Buderus Ecomatic HS4201 (Remote FMEC)

[Technikfreak72]

I have an Ecomatic HS4201 with a display remote FMEC. You can control everything with the remote an it also messures the temperature of the room in which it is installed. The communication is wired over two wires and the remote also needs no other power supply. So I think it is a basic EMS bus. I have a wired Tado thermostate which is configured as EMS and it seems to work but I am not 100% sure sice Tado do not show any connection status or log.
When I try to connect via EMS-ESP by replacing the remote I could not get a connection.
Could anybody help me?

[proddy]

do you see anything at all in the EMS-ESP log when its set to ALL or DEBUG? Look for incoming Rx traffic. Then play with the settings. https://emsesp.github.io/docs/Troubleshooting/#many-rx-errors

[Technikfreak72]

No, I think it has a different baud rate. Now I know it is a different bus type from Buderus called BF-Bus. The Buderus Ecomatic was a top selling product and many are still working as mine after 30 years! To make it smart would be fantastic.
Is there a simple way to test different baud rates and record the traffic on the bus?

[proddy]

EMS is 9600 baud. If you're comfortable with coding, you can download the EMS-ESP code, change the baud in emsuart_esp32.h, build and test it out.

[Technikfreak72]

Thank you