MQTT PWM Dimming led on Arduino

Add-ons Bindings
1

OK so here’s the deal, I built an MQTT arduino device with an led strip attached, all I wanna do is update a value between 0 and 100 and send via MQTT message.

When I use the paho utility: Eclipse Paho | The Eclipse Foundation
I can send a value with the correct subject and the corresponding led will light to that value no problem

I also have a temp and humidity sensor connected it reports every 30 seconds, that seems to work fine,

the problem is if I change the value from openhab, It doesn’t send any MQTT message at all
I’m subscribed to * in the paho utility so I should see something, but no message at all. I think it’s an issue with my item binding which looks like this:

Dimmer FTRled “RED [%d %%]” (lr) {mqtt=“>[myBroker:CONTROL/LIGHTUPDATE/RED:state:*:default]”}

any help would be very much appreciated

2

Hello,

This is exactly was i made with a nightlight.
You can find all OpenHab Config Files and my arduino Code on my Site under http://blue-pc.net/2014/10/21/nachtlicht-mit-arduino-und-mqtt-ueber-openhab-steuern/ its in German but you will unterstand the Code.
Jörg

1 Like
3

For me the following item definition is working:

Dimmer	DIM_00_00	"Licht EG Spots Wohnzimmer"	(gEGWohnzimmer)		{mqtt=">[phc:/phc/ToPHC/STM/00/DIM/00/00:command:*:default]"}

I think you need to change “state” into “command” in your definition.

Andreas

4

if “setfrequency” is not in your sitemap slider wont send any message to mqtt

example of how to use
///sitemap//////
Slider item=ledd sendFrequency=1 label=“LED-light” icon=“slider”

/////item///////
Dimmer ledd “Dimmer” {mqtt=">[broker:/test/esp_test_1/led:state:*:default]"}

also note that either command or state will work