queen barn
Hi, I have 2 existing KNX ceiling lights (kayak-KYAI/1500) and a relatively new Home Assistant setup with ZHA via Deconz Conbee 3 but no KNX bus interface or infrastructure. I want to be able to control the lights, specifically the ability to dim the lights through home assistant.
Ideally a piece of hardware I could wire in between which is zigbee or wifi capable and can control the light with KNX.
delicate dagger
Hi! Are you sure this ceiling lights have KNX on board, not DALI or something like that? Lamps that directly interface with KNX quite rare... (if there are even any)
queen barn
Well, my employer said that they are supposed to be controlled with KNX. Picture of electrical inteface attached
delicate dagger
Well, it says "DALI" on every of those pictures.
You can control DALI from KNX, but this would need KNX infra and a KNX-DALI gateway.
queen barn
And controlling dali via zigbee?
delicate dagger
I don't know anything abut Zigbee.
I think there is a Shelly DALI-Gateway that should work fine with HA though (no KNX there). Maybe you can use this to use HA as DALI-Zigbee Gateway.
queen barn
well, thanks so far, I wasn't aware that dali exists
https://www.sunricher.com/4-in-1-zigbee-to-dali-controller-sr-2411-zg.html seems to be a gateway that could work, I'll look it up more later, thank you!
delicate dagger
In DALI there are device types (eg. DT 8). Your gateway will have to support what the lamps drivers use. Have a look at the manual to find out which are used.
queen barn
Elektronischer Treiber DALI2 (1 Stück)
kayak-KYAI/1500 LED 6400 840 DALI2 sg RAL 9006
I suppose this means DALI device type 2?
or is that the version of DALI
Integrating individual DALI devices to control with Home Assistant (preferably zigbee or wifi)
delicate dagger
no DALI 2 is not DT 2 😬
yeah, look up the manual of the led driver (Osram thingy)
It's probably DT6 as this is single-color LED
queen barn
https://www.interlighting.net/pdf/drees-osram oti dali50.pdf
looks like it supports both 6 and 8.
any benefit of using one instead of the other?
delicate dagger
8 is for tunable white lamps
so if you have warm white and cold white - which your lamp doesn't have according to the spec sheet
see
DIP switch for DT6 or DT8 selection
queen barn
alright, thanks.
found a couple interface devices that would technically work but I only have max. 35mm width clearance, they're all wider so far
something like this, probably https://de.aliexpress.com/item/1005009190844871.html
found one but I'm not 100% sure if it would work, it's called 'controller' and the wiring is a bit different https://www.farnell.com/datasheets/3979402.pdf
it's also quite a bit more expensive :(
delicate dagger
You are aware that you don't need one per lamp, but can use one DALI gateway for multiple lamps (up to max. 32 or 64 lamps I think - depending on gateway - but some only support broadcast or 8 or some other awkward limitations).
queen barn
well, but they need to be connected via cable?
while technically possible it's not really feasible here
delicate dagger
yes right.
queen barn
I mean, the lamps are in the same room, I'd have to take off the wood ceiling though
delicate dagger
Then watch out if the DALI gateway does provide power for the dali bus. There seem to be ones that need external power supply too.
queen barn
that's not an issue
delicate dagger
The idea of DALI is to have 5 wires going from breaker to every lamp in a daisy-chain. 1 PE, 2 mains and 2 DALI bus. So everything is chained up with same wires and controlled over DALI signals individually.
queen barn
daisy chain is not possible here, it'd have to be parallel
delicate dagger
(its a loose topology - so star would work too)
queen barn
great
delicate dagger
you can then install the dali gateway in the breaker room
that's how it's done with KNX usually (mixing dali and knx is quite common)
queen barn
well, considering that I'm focussing on zigbee and don't have wiring for KNX or DALI in any room, I think it's more sensible to just connect those two lamps with an individual DALI-Zigbee controller/gateway/interface
delicate dagger
oh you just have 2? Well, then I wouldn't start pulling new cabling but rather spend an extra 30€ 🙃
queen barn
would be nice if there weren't at least 4 different wireless standards and at least 2 different wired standards for smart home/IoT
delicate dagger
queen barn
would be nice if I could route zigbee over my unifi equipment, considering they both use 2.4G