The Efficient Home Forum

That would be a big problem with my only floorheating system. Water temp should be between 30-40 °C. What will i loose, if i connect to boiler with BDR? The domestic hot water is made in an 200l indirect puffer by the boiler with factory viessmann NTC temperature sensor As described by Bart, the is...

Ok, after many months I've finally got my evohome | vitodens | opentherm | home assistant system setup and am pretty happy with the outcome. https://live.staticflickr.com/65535/48711117798_9dc9bde395_o.gif https://flic.kr/p/2hdrdfA This is really awesome! 8-) 8-) 8-) Thanks, I really appreciate the...

My gateway had a fatal kitchen hardware related accident, I've just ordered a new one yesterday (goodbye summer) so I expect to continue from where I left pretty soon. I hope the gateway didn’t become part of a soup. Seasoned with Opentherm. Plenty of 3D printable OTGW cases out there. Mine only co...

Bart wrote:Congratulations, that certainly looks nice

Thanks Bart.

If you are still using a Home Assistant system I am happy to share the code and image files.

Cheers Stu.

Ok, after many months I've finally got my evohome | vitodens | opentherm | home assistant system setup and am pretty happy with the outcome.

https://flic.kr/p/2hdrdfA

Pi does not need to be slow, when you connect a screen you can see that linux actually boots at a reasonable pace, but then when hassio starts (I think) nothing happens for a while. I haven't run hassio on a Pi for over a year so can't compare performance but HA does load history data on boot so a ...

I installed home assistant on a raspberry pi 2. I managed to connect to the wifi of the gateway, and to add some parameters that I'd like to monitor: Observations after a couple of hours of fiddling around: - although I understood that home assistant should be easy to configure, it took me some tim...

How is the corresponding CHW temp set on the boiler to match the evo controller? It is not and it is not needed. The way evohome seems to work is that is requests for the maximum CHW temperature allowed through opentherm and then when it sends out the temperature it wants, it respects this maximum ...

From this point on the the thermostat is tricked to believe that the boiler Max is 65 and scales CHW desired control setpoint up to this value. It is a kind of man in the middle attack :) The boiler is not aware at all of this trick. The boiler max remains 80, but the thermostat will never ask for ...

Bart, This is excellent work. When I get my bridge up and running would you be willing to share your modified firmware? Just so I understand what you have achieved, can you confirm the following? 1. You send a write command to the evo controller with a preferred CHW temp. 2. Evo controller uses this...