Hi everyone, I’m excited to share my journey of integrating MQTT with OpenHAB 3.0. After migrating from version 2.4, I noticed some changes in how MQTT commands are handled, particularly with my devices expecting 0 or 1 instead of ‘on’ or ‘off’. This was a bit puzzling at first, but I managed to resolve it by setting up a MAP transformation file. Here’s how I did it:
-
Understanding the Issue: My devices were receiving ‘on’ or ‘off’ commands, but they required binary values (0 or 1). This discrepancy was causing some functionality issues.
-
Creating the MAP File: I created a transformation file (
mqtt.map) with the following content:
plaintext
1=ON
0=OFF
ON=1
OFF=0
=default
This ensures that the commands are correctly translated between OpenHAB and my devices.
- Configuring Items: I updated my item definitions to use the MAP profile. For example:
plaintext
Switch pond_heater “Pond Heater” (all) {mqtt=“>[broker:/PondCont/gpio/12:command:MAP mqtt.map]”}
This setup now sends the correct binary values to my devices.
- Testing the Setup: After making these changes, I tested the integration thoroughly. It’s satisfying to see everything working smoothly now!
I’d love to hear how others have tackled similar integration challenges or if there are additional tips to optimize MQTT usage in OpenHAB 3.0. Let’s keep the conversation going and help each other make the most of our smart home setups!