Successfully Integrating Zigbee2mqtt with OpenHAB for Color Control

General
1

I’ve recently been diving into the world of smart home automation, and one of the most exciting projects I’ve undertaken is integrating my Philips Hue light strips with OpenHAB using Zigbee2mqtt. I wanted to share my experience and the solution I found, in case it helps others who might be facing similar challenges.

Initially, I followed some existing guides to set up the integration, but I encountered issues with getting the color controls to work properly. After some trial and error, I managed to come up with a solution that works seamlessly for me. Here’s a quick overview of what I did:

  1. Configuration Setup: I started by setting up the Zigbee2mqtt integration within OpenHAB. This involved configuring the MQTT topics for both sending commands and receiving state updates from my Hue lights.

  2. Custom Transformations: The key to getting the color controls working was creating custom transformation scripts. These scripts convert the HSB (Hue, Saturation, Brightness) values from OpenHAB into the JSON format that Zigbee2mqtt expects, and vice versa.

Here’s a snippet of the transformation script I used:

javascript
(function(i) {
var logger = Java.type(‘org.slf4j.LoggerFactory’).getLogger(‘org.openhab.transform.colorcsv2json’);
var parts = i.split(‘,’);
var h = Math.floor(parseFloat(parts[0]));
var s = Math.floor(parseFloat(parts[1]));
var b = Math.floor(parseFloat(parts[2]));
b = Math.floor(b/100 * 254);
var response = {
color: {
hue: h,
saturation: s
},
brightness: b
};
var result = JSON.stringify(response);
return result;
})(input)

  1. Testing and Fine-Tuning: Once everything was set up, I tested the integration thoroughly. It was a bit of a learning curve, but seeing the lights respond perfectly to the color controls in OpenHAB was incredibly satisfying!

I’d love to hear from others who have successfully integrated their Hue lights or other Zigbee devices with OpenHAB. What challenges did you face, and how did you overcome them? Sharing experiences like this really helps the community grow and learn together.

Happy automating! :star2: