Koenkk / Koenkk/zigbee2mqtt

Sonoff Mini ZBDIM transition not 0

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Description

What happened?

I have a Sonoff Mini ZBDIM and configured "dimmer_transition_time": 0. However, there's still a visible transition when turning on/off the light. This is especially annoying when walking into a room and turning on the light using the wall switch as it takes some time unti it's on.

Now, I'm not sure, whether this is a Z2M issue or simply that the dimmer cannot do instant on/off.

What did you expect to happen?

Lights turning on/off immediately with no transition when "dimmer_transition_time": 0

How to reproduce it (minimal and precise)
  • Set "dimmer_transition_time": 0
  • toggle light state
Zigbee2MQTT version

2.14.1

Adapter firmware version

8.0.2 [GA]

Adapter

Sonoff ZB Dongle-E

Setup

HA addon

Device database.db entry

No response

Debug log

No response

Notes

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No files, tests, or code entry points are identified in the report. Start by reproducing the behavior with Zigbee2MQTT 2.14.1, a Sonoff Mini ZBDIM, and dimmer_transition_time set to 0, using the listed adapter and Home Assistant add-on setup. Done means determining whether the transition is caused by Zigbee2MQTT or by the dimmer, with evidence such as a debug log or a documented device limitation.

Written by the indexing model from the issue text.

Assessment

Domain
embedded-iot
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
45/100

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