hi guys
just wanted to share this project with you.
had a lot of problems with intercoms in several appartements.
In my current appartement I have the koch intercom „Koch VTC60“ (Innensprechanlage) and I was not able to connect it with the „nuki opener“. After so many tries and I used a fingerbot in the end. But it was a bit ugly to have a fingerbot sticked on your intercom and had to change the batteries from time to time.
So in the end I found the glory solution.
It‘s the „Doorman S3“
I had to contact florian and paid the device and he sent me one to my address. if he has some in stock, you will get it a bit faster or it will take some time. I had to wait about 3-4 weeks.
I took a screwdriver and did this:
then I was just plug in these cables
„a“ to „TCS:BUS right“
„b“ to „TCS:BUS left“
„P“ to „P“ (24V power)
the koch vtc60 can deliver 147 mA
and the doorman need about 60 mA (probably less than 60 mA)
so you don‘t have to connect it to a seperat power supply like usb-c and can use the power of the intercom directly.
now I‘m able to open the entrance door with HA and there is also an event, which will trigger, when somebody is ringing. Even ring-to-open is possible, when somebody rings it will open the door automatically.
that‘s really great and I was looking so long for a solution and finally found it.
thanks to florian the dev.
for more details see here: