[Solved] Connection of the QS-Zigbee-D02-TRIAC-2C-LN switch to the ceiling lamp and the Home Assistant

Hello, I have such a switch: QS-Zigbee-D02-TRIAC-2C-LN
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When I connect it to the masterpiece below, everything works fine - I can control the light with the monostable switch and via the home assistant.
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However, when I try to hook it up to a ceiling light, the light doesn't turn on and the zigbee module is not available on the HA. Here is how I am trying to do this:
Can
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According to my interpretation (based on the colours + how the double switch was connected before + the voltages between black and blue): black L, brown L1, L2, blue in the N connector, there's still PE in the back there, which you can't see.

When I plug in the monostable switch alone - it works
4803bb425 .
When I plug in the zigbee module - it stops working


If there was any doubt:
- L goes to L of the zigbee and the input of the switch
- output from the switch goes to S1 zigbee
- L1 zigbee goes where the switch output went before
- N to N

Does this connection seem correct to you?
Could there be something with the lamp itself that prevents it from working with this switch?

There is probably no N on the blue one. As there was a regular switch there before then N was not needed.
Check on the "bulb" that you have voltage on the L-N terminals

There is voltage, I have just checked a second time

wty wrote:

There is voltage, I just checked a second time

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With a voltmeter, a neon lamp, or an incandescent bulb?

Since it's working on the plug, you've got on mixed something in the installation and correspondently it's not easy to diagnose.

Disassemble everything

1. take a bulb and find the two wires on which the bulb lights. Identify the L on these two with a neon lamp.
2. connect these two to QS phase to L, 'zero' to N
3 Check that it works from the application.
4, Connect L through the switch to terminal S1
5, Check that it works.
6, Connect the wire to the lamp to terminal L1

Ok, before I do that I have another observation.

1. with the double bistable switch (what has always been there) - the ceiling lamp works. You can switch on both circuits independently
2. if I connect a single monostable switch, I can control only one circuit with it - if I connect it under, say, L1, when I hold the switch 2 out of 3 bulbs light up, if I connect it under L2 nothing lights up
3. if I connect a bulb like this (here again double bistable):
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then the bulb only lights up when I switch on L1 (which is what worked with the monostable). I normally connect a zigbee module in place of the bulb so it's no wonder it doesn't work.

As you can see I'm no expert but.... I expected something different.

That L2 (what doesn't work with the monostable), it goes directly to the wall somewhere, L1 is connected in the box with two other cables that go to the wall

Edit:
OK... my L1 is L, and my L is L1....

I can't put what you've written together to 'fit'.
You need to sort out and identify the wires and connect in stages.

Yes, I've mixed up these cables, I'll let you know what's up with the zigbee when I connect the "new way"

Edit:
Everything is working. Thanks.