Lights turning ON automatically at night — KNX + Control4 + Hager TX211A 1-10V
Hi all,
Facing a ghost lighting issue at a residential project for the past 30 days. Lights in one specific room turn ON automatically at 100% brightness, randomly at night 1-2 times.
Setup:
Hager TX211A 1-10V dimmer (2 units)
Control4 EA-5 via KNX IP Gateway
LED fixtures on 1-10V control
What we have checked:
All group addresses, scenes, timers, logic, parameters — nothing found
Bus/mains voltage recovery — set to No Change
No sensors or keypads linked
Created new group addresses — issue persisted
Deleted lights from Control4 — issue persisted
C4 schedules, agents, macros — nothing found
Replaced both TX211A with new units — issue still persists
Key observation:
When lights turn ON automatically, Control4 app slider also moves — meaning KNX is sending a status feedback to C4. But no clear telegram source identified.
Has anyone faced similar issue? Could the KNX IP Gateway itself be generating telegrams? Any leads appreciated.
Thanks
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Since the Control4 slider moves, there’s a telegram on the bus. I’d leave the ETS Group Monitor (or Bus Monitor) running overnight, logging to a file and filtering for that room’s group addresses. The source physical address of the telegram that turns the light on will show whether it’s coming from the IP gateway or another device.
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