Homematic Dimmer "flashing" for every "on" state

[ronny332]

Hi,

it's more a request for a code change than a bug report.

Please check line 1177: this.mappings.On = { reading: 'pct', valueOff: '0', cmdOn: 'on', cmdOff: 'off' };

The 'on" for 'cmdOn' creates a very aggressive flashing of the device, especially when you are using a light source with lots of power.

In my case changing the line to this.mappings.On = { reading: 'pct', valueOff: '0', cmdOn: '1', cmdOff: 'off' }; makes me really satisfied.

The device is starting at the lowest step and raises up to the desired value.

[justme-1968]

the problem is that homekit sends an on cmd before the pct command. this is regarded by most as a bug in homekit. with your change a normal on will not work anymore.

the current workaround is to use cmdalias in fhem to ignore the on cmd in certain circumstances.

i will try to change homebridge-fhem to ignore the on cmd if it arrives immediately before or after the pct.

thill then you can use the homebridgeMapping attribute to get your desired behavior.

[ronny332]

Hi, yeah, I understand what you mean, but for the used dimmers in my case (HM-LC-DIM1T-FM) this does not happen. Even with a command which sets the dimmer just to "on", the light starts at 1% and raises within 2-3 seconds to 100%.

This is what exactly is sent to the running FHEM instance:

[10/12/2017, 10:28:15 PM] [fhem] hm_dim_wzUnten: executing set cmd for On with value true [10/12/2017, 10:28:15 PM] [fhem] executing: http://127.0.0.1:8083/fhem?cmd=set%20hm_dim_wzUnten%201&XHR=1 [10/12/2017, 10:28:15 PM] [fhem] hm_dim_wzUnten delaying command Brightness with value 100 2017-10-12 22:28:15 caching: hm_dim_wzUnten-pct: 0.5 [10/12/2017, 10:28:15 PM] [fhem] caching: On: true (as boolean; from '0.5') [10/12/2017, 10:28:15 PM] [fhem] caching: Brightness: 1 (as number; from '0.5') [10/12/2017, 10:28:16 PM] [fhem] hm_dim_wzUnten: executing set cmd for Brightness with value 100 [10/12/2017, 10:28:16 PM] [fhem] executing: http://127.0.0.1:8083/fhem?cmd=set%20hm_dim_wzUnten%20pct%20100&XHR=1 2017-10-12 22:28:16 caching: hm_dim_wzUnten-pct: 1.5 [10/12/2017, 10:28:16 PM] [fhem] caching: On: true (as boolean; from '1.5') [10/12/2017, 10:28:16 PM] [fhem] caching: Brightness: 2 (as number; from '1.5')