Dsiplaying dimmer percentage in Domoticz

[MikeF]

I'm using an RGBW LED controller with the MySensors RGB-3D sketch, and Domoticz as controller. I've set up the four LED channels as dimmers in Domoticz, and I can control the LEDs via the sliders and on / off switches.

Using the sliders displays percentages OK in Domoticz, and turning off a channel leaves the slider at the last position (but displays 'Off'). However, turn back on and the slider goes to 100% (and the switch displays 'On'), although the sketch - correctly - restores the last dimmer value (e.g., 60%).

Is there any way to get Domoticz to display the percentage (slider and value) when turning the switch back on?

[fifipil909]

I've got same issue.
After some debug, it appear that domoticz always set value to 100% when turning a Dimmer to on.
So, just backup the % value on your sensor, and send it back to domoticz when you receive the V_Light message.

you will see on this page, http://www.mysensors.org/build/dimmer line 223 that the % value is sent back to the controller.

[MikeF]

Thanks for the pointer @fifipil909 - I've now got it working successfully :smile:

[MikeF]

I'm seeing a strange effect with the same setup: if I drag the slider in Domoticz, it will display a percentage (e.g., 63%), but MySensors often displays a value (in Serial Monitor) a few points lower (e.g., 60%), and then Domoticz jumps down to that value. It also seems that the values are in intervals of 6 or 7% (e.g., 7% is the lowest I can get, and 100% goes down to 93%).

Any clues?

[fifipil909]

Hi yes, same things for me.
It's look to be domoticz behaviours. the percentage from 0 - 100 is translated to 16 different step, that give you round value of 100/16 = 6.25
This is why your "Wanted value" goes to something closer.

This is written on this page : http://www.domoticz.com/wiki/Domoticz_API/JSON_URL's#Set_a_dimmable_light_to_a_certain_level

[fifipil909]

if you want to see more details arround the sliders
https://github.com/domoticz/domoticz/blob/49ddc50ee3099c00af1dac7c37dedc6f58a62a2a/www/app/LightsController.js#L2980

[MikeF]

Thanks again, @fifipil909 ! I do now recall the JSON section in the wiki stating this. I've also discovered that V_DIMMER is deprecated in MySensors 1.5 in favour of V_PERCENTAGE, but same behaviour here.

Shame you can't get 100%! :disappointed:

[A Former User]

Hey!
I've got a similar problem with a dim able LED-strip:
I'm not sure, but I think Domoticz sends wrong values because in the "DimmableLEDActuator" example of MySensors at int requestedLevel = atoi(message.data); I receive weird values all above 100.
For example when I choose 7% in Domoticz I receive 790 (or sometimes 710 or 740??) at the µC.
Can you please tell me how to fix this?

Thanks!

[MikeF]

Are you sure that you included the lines below '// Clip incoming level to valid range of 0 to 100'? Values from Domoticz should be in the range 0 to 100 (%), whereas values sent to the pins (LEDs) in fadeToLevel() are converted to the range 0 to 255.

[A Former User]

Yes, I have not modified the example from MySensors:

//  Retrieve the power or dim level from the incoming request message
    int requestedLevel = atoi(message.data);

    // Adjust incoming level if this is a V_LIGHT variable update [0 == off, 1 == on]
    requestedLevel *= ( message.type == V_LIGHT ? 100 : 1 );

    // Clip incoming level to valid range of 0 to 100
    requestedLevel = requestedLevel > 100 ? 100 : requestedLevel;
    requestedLevel = requestedLevel < 0   ? 0   : requestedLevel;

    Serial.print( "Changing level to " );
    Serial.print( requestedLevel );
    Serial.print( ", from " );
    Serial.println( currentLevel );

    fadeToLevel( requestedLevel );

Its strange, because the µC receives the same value for 7% and for example 78% in Domoticz...
So its clear that it can't distinguish between them.