Renovent HR Medium/Large - Brink Climate Systems

[sincze]

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

• Yellow
• Red
• Black

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

• yellow-black
• red-black.

The sketch can be found here:
0_1500406156812_sketch_jul16a_-_Brinks_WTW.ino

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.

[sincze]

@sincze https://github.com/sincze/mysensors_brinks_renovent (seems the link in the post did not work)

[sincze]

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:

[Remelco]

This post is deleted!