I have the same thermostat. Perfect to find such a solution. If I understand your approach right, you are using the clock input to control the thermostat. I found out that the thermostat controls the boiler temperature by modulating 0-24V if I remember right. At the end of summer I will give it a try. Thank you to share your informations. I come back to you with a feedback β¦ or questions:-). I am no programmer so I hope I can follow your instructions.
Nice to hear my solution will be useful for other people as well.
Unfortunately I finished this project exactly when the βsummerβ started.
So I have no real life experience, yet.
At first I thought I could use the 24V modulation as well.
But I read somewhere that the thermostat does a little more than just setting the boiler to ON or OFF.
So replacing just the clock seems to be the safest solution.
Hi, I have also spent alot time thinking about how to control my Junkers Heating a bit more smart. I also planed to build an Arduino based controller on my own to completely replace the existing room controller (TR100 in my case). But last year I found the Tado Smart Thermostat as replacement for the TR100 which covers all my needs out of the box.
Perfectly compatible to almost all Junkers Heating especially the ones which can be controlled by a TRQ21 or TR100
Individual Heating Plan for every day
Automatically Switch to Away mode by GPS Location of the Smartphone
Manual control
Early Start (start heating when I come clother to my home)
Perfectly integrates with Homekit, Alexa, IFTT and openHAB
a nice smartphone APP to configure everthing and see stistics
Not too expensive
Works out of the box without the trail and error a self build themostate would bring until it works as expected.
Especially because of the presencedetection in combination with the Smartphone app I use a very simple heating timpleplan. Only day and night, all other things like work, holidays etc works automatically.
There are also Tado Radiator Thermostats but for this I use the much cheaper MAX ones controlled by homegear. OpenHAB Switches the MAX thermostates to ECO mode if the Tado Thermostat is in Away Mode.
Hi Christoph,
iβd be interested in your controller. I have a TRQ 21 and it doesnt suit my needs either.
Although i am quite new to this, heat controlling, smart home, openhab, i think this could help. Is it still available?
Thank you!