Hello,
I use OpenTherm gateway with out room thermostat. Your integration work great but I think you should add service for changing DHW boiler temperature. Sensor is sensor.dhw_setpoint_xxx but I really need to have ability to change this value in the same way as opentherm_gw.set_control_setpoint works. This work in py-otgw-mqtt so it should be possible to do in official component.
Another thing is Heating Curve which you set if you have outside temperature sensor. You don’t have to set static setpoint of CH but instead you set curve and boiler calculate CH temperature.
Thank you.