IKEA KAJPLATS GU10 (LED2403R5) won’t join Zigbee2MQTT

Configuration Zigbee
1

Hi all,

I’m trying to pair an IKEA KAJPLATS GU10 bulb, model LED2403R5, with Zigbee2MQTT, and I’m stuck.

This is the bulb:

  • IKEA KAJPLATS GU10
  • Model: LED2403R5
  • Box says Matter
  • 575 lm / 2700 K

I’ve seen reports on Home Assistant forums / Reddit / Zigbee2MQTT that this bulb may have an undocumented Zigbee pairing mode.

What I’ve tried

  • Confirmed Zigbee2MQTT is working normally with my existing Zigbee setup
  • My Zigbee network is already on channel 25
  • Put Zigbee2MQTT into permit join
  • Tried the 12x power cycle / on-off sequence that people mention for Zigbee mode
  • The bulb then:
    • goes white
    • briefly flashes
    • then stops
    • but never appears in Zigbee2MQTT

So it looks like something is happening - the bulb responds differently after the (x12) sequence - but it never actually joins the Zigbee network, or drops into a ‘pairing’ mode (continuous flashing)

  • Has anyone here successfully paired this exact model (LED2403R5) with Zigbee2MQTT?
  • If so, what was the exact power cycle sequence/timing you used?
  • Does it require:
  • a 6x reset first, then 12x?
  • very specific timing between toggles?
  • being extremely close to the coordinator?
  • an IKEA remote / Touchlink step first?
  • Is there any known issue with this bulb on channel 25, even though that should be a supported/default Zigbee channel?

I’m using:

  • Home Assistant
  • Zigbee2MQTT
  • SONOFF Zigbee 3.0 USB Dongle Plus
  • Bulb is very close to the coordinator during testing

At this point I can reliably get the bulb to go white and flash briefly after the 12x sequence, but it still refuses to show up in Zigbee2MQTT.

If anyone has got this exact bulb working, I’d really appreciate the precise steps you used

2

Isn’t that bulb Matter, not Zigbee? Most Ikea devices are now Matter only.

3

According to this and other threads here & Reddit it can be used with Zigbee

4

It is supported in Z2M. There are a few more things you can try here IKEA LED2403R5/LED2403R5NA control via MQTT | Zigbee2MQTT

I’ve also read somewhere that 15x power cycles might help.

If the device flashes, but does not join, this may help:

  • Use a default Zigbee channel (11, 15, 20, 25)
  • Bring it very close to the coordinator
  • Pair another device at the same time
  • Fiddle with an IKEA remote: re-insert batteries, press buttons, activate Touchlink
5

The symptom you’re describing — bulb flashes briefly but never shows up in Z2MQTT — is probably caused by missing the 6-cycle reset before the 12-cycle sequence.

Check this HA Blueprint here: Ikea Kajplats Zigbee mode — confirmed working via smart plug HA automation that does the entire thing for you automatically.

Just plug your lamp into a smart socket, screw in a bulb, run the script, and it handles the full sequence with the correct timing — no manual counting, no losing track. Works for both older IKEA Trådfri bulbs (6 cycles only) and the newer Kajplats Matter bulbs (6 + 12 cycles). Huge time saver.