I’ve created a custom integration for Tekmar (tekmarnet) networked thermostats, setpoint, and snowmelt controls with tN4 or tN2 communications using the Gateway 482. This is a local push integration, so it does not work with Tekmar devices that use wifi or cloud, only wired tekmarnet.
The integration uses a companion add-on to communicate with the Tekmar Gateway 482 over RS232. The add-on can run on the same Home Assistant installation as the integration, or they can run separately. I’m running mine separately since my Home Assistant system is located in a different part of the house from my gateway running on a Pi 3 A+ with USB serial adapter connected with wifi.
The integration can be added using a custom HACS repo or manually into custom_integrations. The add-on can be added through the add-on store by adding its repository.
Nice! Do you have any insight on if this will work with the new Boiler Control 294? That unit seems to be the new form factor that will replace the 482 gateway.
The 294 doesn’t have a serial port and doesn’t support the tekmar automation protocol, so no it will not work. Much like the 486 only supports “cloud” with no local interface the 294 appears to be the same path as the 486 (I have a 486 too and it’s useless for HA integration).
I haven’t seen anything that says the 482 is being discontinued.
And the connect that to a 482 which then I could connect to HA.
There’s two ways I can get the mini splits connected to the 482, either through the 557 thermostats connected to the DKN Plus interfaces directly, and then the thermostats connected directly to the 482.
This option leaves some control of the heat pump out of the loop because the third party thermostat controls for the DKN plus only have Heat, Cool, Fan controls, No louvre position or mode.
But if I connect the DKN plus directly to the 482 through Modbus, it seems like I should be able to control everything on that unit. I just don’t know how I could verify if that would be possible.
Any thoughts for me? Appreciate anything you could offer. Thanks for your work on this integration.
Thanks. Tekmar is also confirming that I need to pick between the 482 with local serial integration and the 486 with remote apps and no API. I am pretty much stuck with the 486 so the installer gets remote diagnostic access.
Thanks for all your work here. It’s clear that the 482 is required for HA integration.
With that being said, does that mean I cannot use a Tekmar Thermostat that supports WiFi??
I was considering buying the Tekmar 561 for Hydronic Radiant…can I assume that would actually not work with the 482 Gateway as Tekmar’s website does not show support for “tekmarNet Communication”?
Looks like the comparable non-WiFi is the Tekmar 552, (which shows TekmarNet").
If that’s the case, looks like 532, 552, 553, 554, and 557 (from the Performance & Designer Series) Thermostats would work.
Correct, the wifi thermostats DO NOT support tekmanet for the 482 gateway. Wifi only supports their cloud, which doesn’t have any API that I’m aware of.
The 532, 552, 553, 554, and 557 are the “tekmarNet Thermostats” that work with the 482 gateway.