Search found 5 matches

by remknul
Monday 16 April 2018 16:11
Forum: Show your projects
Topic: Nefit / Buderus data/control via Arduino / ESP8266 to Domoticz (directly without OpenTherm module or Easy)
Replies: 178
Views: 28542

Re: Nefit data/control via Arduino to Domoticz (directly without OpenTherm module or Easy)

both values are indeed the room temperature. Looks like the last value is the actual temperature. And the first value seems to be a delayed version of the current measured temperature. Is this common bahaviour to send a kind of delayed temperature? Could perhaps also be an averaged temperature valu...
by remknul
Friday 06 April 2018 23:55
Forum: Show your projects
Topic: Nefit / Buderus data/control via Arduino / ESP8266 to Domoticz (directly without OpenTherm module or Easy)
Replies: 178
Views: 28542

Re: Nefit data/control via Arduino to Domoticz (directly without OpenTherm module or Easy)

Do you see a message 0x91? According to the array in my sketch this should contain the room temperature, at least for the Moduline 200. You can quickly test if CD is the actual room temperature by pointing a hair dryer at the thermostat. Hair dryer did the trick :) both values are indeed the room t...
by remknul
Friday 06 April 2018 15:15
Forum: Show your projects
Topic: Nefit / Buderus data/control via Arduino / ESP8266 to Domoticz (directly without OpenTherm module or Easy)
Replies: 178
Views: 28542

Re: Nefit data/control via Arduino to Domoticz (directly without OpenTherm module or Easy)

I'll try the 0xAE telegram later. I haven't seen it broadcasted before. (I made some dumps) Perhaps I can request it by a read action. From the dumps I made earlier, one of the telegrams I do see broadcasted on the bus is the following: 17:00:B1:00:04:26:00:CD:00:00:00:CD 0x04 ??? flags ?? 0x26 seem...
by remknul
Friday 06 April 2018 11:34
Forum: Show your projects
Topic: Nefit / Buderus data/control via Arduino / ESP8266 to Domoticz (directly without OpenTherm module or Easy)
Replies: 178
Views: 28542

Re: Nefit data/control via Arduino to Domoticz (directly without OpenTherm module or Easy)

Hi everybody, Kees, I'm also inspired by this project and already have breadboarded prototype working. I included opto-couplers between Arduino and the EMS bus electronics. I also generated a 5V power from the EMS bus. Seems to work. So far... thanks to Kees for all the info and Arduino code which g...