Automating my legacy home automation system (domintell)

[rvaningh (Ronny Vaningh)]

I have a legacy home automation installation from Domintell. I am still on their old master and have no network connectivity into the system.
The system works with niko switches (momentary press) that are connected to dry contact inputs. The software allows met to link these inputs into one or more outputs or groups, create scenes. I was thinking to wire the push buttons into a KinCony B16M which is integratable with HA over mqtt. So button > mosfet > domintell dry contact. This way I could controll the inputs of the domintell system from my physical buttons and HA and HA would be able to read them. Would this work - any other suggestions (I do not have AC wiring to my wall switches, only low voltage cable to the distribution box).

[hapasse]

Hi,

DISM04/08/20 can not be driven by MOSFET or any other semiconductor ouptut stage. So you cannot create a kind of follower by making DIGITAL_OUTPUT follow DIGITAL_INPUT (NIKO button->DIGITAL_INPUT_n->HA automation->DIGITAL_OUTPUT_n->DISM0x)

An possibility would be to connect a 5VDC/12VDC coil relay to DIGITAL_OUTPUT_n and the dry contact output of the relay to the DISM0x and inject a 5 or 12 VDC voltage to DIGITAL_OUTPUT_DC terminal.

If think that Finder has relays that can be installed on DIN rail. Or you can use another HA compatible relays module to forward

NIKO button->DIGITAL_INPUT_n->HA automation->DIGITAL_OUTPUT_n->Relay coil->Relay output->DISM0x

ESP32 Smart Controller – B16M (16CH MOSFET)

Instead of KinCony, you could try a Waveshare module that seems more suited for what you want to achieve (but of course, it may need more investigation).

8-ch Ethernet Relay Module (B) With Digital Input, Modbus RTU/Modbus TCP...

Connect your Niko button to DIn and the DISM0x wires to CHn and link them thanks to the using HA automation

It seems that CHn can be directly controlled by DIn depending of the configuration.
I do not have this Waveshare module but it should work.

See this post:

Help with Waveshare POE TCP Modbus Relay configuration

Use sscom to send the neccesary command. Then use HA to toggle relays or Modbus Poll. 0x0000:Normal mode,relays are directly controlled by commands; 0x0001: Linkage mode,relay status is consistent with the corresponding input channel status; 0x0002:Toggle mode,a pulse in the input channel toggles the relay state once; 0x0003: Edge mode,an edge change in the input channel toggles the relay state once To set all relays to Toggle Mode (control mode 0x0002) using Modbus TCP, the command needs …

Whatever the solution you find, the most important thing to keep in mind is that DISM0x can only be controlled by dry contacts!

You can also try using Shelly modules that are often well handled in HA. Everything depends of the money, the place and the time you have. These third-party solutions will mostly be cheaper than a DNET01.

Best regards.