Tasmota - Dimmer ON bounces from 0 to 100 to 1

Setup, Configuration and Use Beginners
1

I have a strange problem. I’m using a bunch of Sonoff lamps with Tasmota FW with OpenHAB.

When I send the ON command to the dimmer object, the object first goes to 100 and then immediately to 1. If I send 100 to the dimmer object, all works as expected.

Using 2.4.0.1 stable on Ubuntu.

Log:

2018-12-27 12:33:05.746 [ome.event.ItemCommandEvent] - Item ‘HallwayDim’ received command ON
2018-12-27 12:33:05.749 [vent.ItemStateChangedEvent] - HallwayDim changed from 0 to 100
2018-12-27 12:33:05.806 [vent.ItemStateChangedEvent] - HallwaySw changed from OFF to ON
2018-12-27 12:33:05.807 [vent.ItemStateChangedEvent] - HallwayDim changed from 100 to 1
2018-12-27 12:33:06.622 [vent.ItemStateChangedEvent] - Echo_Living_Room_LastVoiceCommand changed from turn on living room lights to turn on hallway light

Same for groups:

2018-12-27 12:31:56.698 [ome.event.ItemCommandEvent] - Item ‘gLRL’ received command ON
2018-12-27 12:31:56.699 [ome.event.ItemCommandEvent] - Item ‘B1_1_Dim’ received command ON
2018-12-27 12:31:56.699 [ome.event.ItemCommandEvent] - Item ‘B1_2_Dim’ received command ON
2018-12-27 12:31:56.700 [ome.event.ItemCommandEvent] - Item ‘B1_3_Dim’ received command ON
2018-12-27 12:31:56.700 [vent.ItemStateChangedEvent] - B1_1_Dim changed from 1 to 100
2018-12-27 12:31:56.700 [GroupItemStateChangedEvent] - gLRL changed from 100 to UNDEF through B1_1_Dim
2018-12-27 12:31:56.701 [vent.ItemStateChangedEvent] - B1_2_Dim changed from 1 to 100
2018-12-27 12:31:56.701 [vent.ItemStateChangedEvent] - B1_3_Dim changed from 1 to 100
2018-12-27 12:31:56.701 [GroupItemStateChangedEvent] - gLRL changed from UNDEF to 100 through B1_3_Dim
2018-12-27 12:31:56.794 [vent.ItemStateChangedEvent] - B1_3_Dim changed from 100 to 1
2018-12-27 12:31:56.794 [GroupItemStateChangedEvent] - gLRL changed from 100 to UNDEF through B1_3_Dim
2018-12-27 12:31:56.796 [vent.ItemStateChangedEvent] - B1_1_Dim changed from 100 to 1
2018-12-27 12:31:56.797 [vent.ItemStateChangedEvent] - B1_2_Dim changed from 100 to 1
2018-12-27 12:31:56.797 [GroupItemStateChangedEvent] - gLRL changed from UNDEF to 1 through B1_2_Dim
2018-12-27 12:31:57.688 [vent.ItemStateChangedEvent] - Echo_Living_Room_LastVoiceCommand changed from turn on living room lights to
2018-12-27 12:31:57.688 [vent.ItemStateChangedEvent] - Echo_Living_Room_LastVoiceCommand changed from to turn on living room lights

2

Hmmm… It seems that OpenHAB sends “ON” to the Sonoff via the dimmer command and Tasmota then reports back “1”…

bnsz1-1/cmnd/Dimmer ON
bnsz1-1/stat/RESULT {“POWER1”:“ON”,“Dimmer”:1}

3

The 100 state will be due to the autoupdate feature making a guess as to what the result of ON will be. Autoupdate can be disabled on individual Items.

4

Thank you! That solves that mystery!
Does anyone happen to know how to get Tasmota to take “ON” as “100” and not as “1”? Or should I just not bother and fix it from OpenHAB e.g. with a transformation?