Renovent HR Medium/Large - Brink Climate Systems
I wanted to have my Renovent HR Large from Brink Climate Systems automated.
Unfortunately Brink offered a € 300 solution to do this wireless within the house
I thought.. Well it must be possible to use one of the Mysensors sketches to do so.
By default this system comes with a 3 way switch that is connected to an rj11 plug on the Renovent.
The RJ11 has 3 cables
After figuring out how the 3 way switched worked it was an easy task with one of the example sketches.
- Yellow + Black = Switch_2
- Red + Black = Switch_3
- By default nothing is connected = Switch_1.
If you would like to measure voltage you will measure aroun 13,88v on
The sketch can be found here:
You will need 2 Relais if you want to switch Switch_2 and Switch_3.
Please see attached the prototype... available for around €10 .
And then within Domoticz I can control it.
If the humidity in the bathroom is over 58% kick on the fan
Oh btw. don't forget to connect the ground of the Relais to the Ground of the Arduino, otherwise it will not work.
Happy Mysensors day.
@sincze https://github.com/sincze/mysensors_brinks_renovent (seems the link in the post did not work)
Just an update regarding the Renovent Climate system:
I created the following cheat sheet:
To be able to read the 'filter' value I converted the default RJ11 to RJ12.
Now it should be able to warn me that I need to change the filter.
As I use the EasyPCB and already used all available pins on the prototype board, I had to solder an extra wire to pin 8.
Q: How do I access A2, A3 and D8? A: They are not accesses through the PCB, so you need to directly solder to the pro mini.
As this Pin 8 is not used with pull up resistor (I thought it was dangerous to do that because adding 3v of the Renovent would kill the input.) I needed to build some sort of pull-down resistor from keeping the input pin from floating. And hell yes it was floating like hell (resulting in a lot of messages, that even the debouncer was unable to deal with).
Normally when the filter is 'clean' there is a 0v on P8. If the filter needs to be cleaned there is a +/- 3v on P8
This how it was solved: