After a transatlantic move back to my native UK, I'm just starting to unpack some of the non-essential stuff like my Hubitat (I know, calling it non-essential might get me kicked out from here... ) and my first task is to tackle the garage door.
The new house has a roller-type door, and the controller has separate Up, Down and Stop commands (along with matching input terminals in the existing controller), unlike my old US one that was a straightforward single-button-on-the-wall operation. (It's specifically an Ellard-labelled NVM NT-1006, wiring diagram is here (pdf). Note the "Up", "Down" and "Stop" terminals in the lower-right corner.
Ideally I'd like to build a setup that allows remote sensing of garage door position, remote Full-Open, Full-Close, and Pre-programmed partially open positioning (Open/Close to Position X then Stop), along with notifications based on time-opened (and position-opened) and time of day.
That will take a fair bit of thinking about integrations, so I'll start with the easier bit - hardware. Except, all the Zigbee (etc) hardware boxes seem to be designed around a single open/close relay where I need three. Are there any boxes out there that have three (or more) separate relay channels that link into the Hubitat ecosystem? Bonus points if the three relays are (or can be set to) exclusive activation (i.e. only one active at once), to prevent simultaneous contradictory commands being sent to the controller. Double bonus points if it's available in the UK or EU so I don't have to bug my brother-in-law...
I did this on a friends house. You need 2 NO dry contact relays and one NC dry contact. The NC needs to be wired in series with the stop button. The other 2 wire in parallel with the open, close, buttons. I used some Tuya relays but a couple of the Zooz relays would be more reliable.
Beyond that it's just RM or special app. All the activations need to be momentary.
I think I follow your meaning, but in this case, there's no external Up/Down/Stop buttons, they're built into the case. The terminals at the bottom of the circuit board are currently empty so there's no additional button to sit parallel/serial with. Assuming the 12V supply is wired to the input side of each Dry Contact relay, I don't think I'd want an NC for the Stop terminal or it'd be a continuous command.
To be clear, though, this setup needs multiple separate relay units?
The 4th channel would probably be useful for controlling the lights in the garage, I'll have to take a look, thanks.
Edit: Although to connect to the existing controller I'd probably get this one: https://www.amazon.co.uk/dp/B091GS6J5W/ and sort out the lights another way...
) and my first task is to tackle the garage door.
