Reference inovelli firmware binding bug

Inovelli Zigbee Binding Bug

Inovelli switches shipped on firmware 0x01020303 have a known bug: the switch will not send dim commands over a Zigbee binding (device-to-device or device-to-group). Tap on/off works via automations, but hold-to-dim is completely silent over the air.

Firmware 0x01020304 fixes this. Recessed switch in Justin's studio was already on the fixed version; a new Spotlight Switch shipped on the old version, which caused hold-dim to fail with identical config.

Diagnosis shortcut: if a new Inovelli tap works (automation catches it) but hold-dim does nothing despite a correct binding, check firmware version first. Compare to a known-good switch.

Fix: trigger OTA update via ZHA. Update is slow (30-60 min over Zigbee); leave the switch powered throughout. Do not cut breaker during OTA (risk of bricking a partial flash). After update completes, re-affirm the group binding and test hold-dim.

Also noted: binding an Inovelli switch's dimming cluster to more than one group simultaneously can break the working binding. Only bind to one group target at a time.

[Claude Code] 2026-06-29

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