After updating my OpenHAB installation to the latest version (running on Raspbian), I encountered an issue with my RGB controller that used to work flawlessly before the update.
Setup and Problem:
I use several rules to control the RGB values. For example:
rgbcontroller.sendCommand("240,100,10") // Set to blue
Previously, this worked perfectly to change the RGB color (e.g., turning blue when a button in the Hab-Panel-UI is pressed).
However, after the update, the behavior has changed:
- The RGB values are sent to the item, and both the logs and the item state show the correct values as expected.
- But the color of the RGB controller does not change, even though the item reflects the intended value (e.g., “blue”).
Observations:
The strange part is that if I manually change the RGB values using the slider in the Main UI, everything works fine. The logs in DEBUG mode show no difference between the working (manual change) and non-working (rule-based change) cases.
Workaround:
To make the rules work, I had to modify them as follows:
- Add a
Thread::sleep(500)
(500ms delay) after sending the command. - Add a
postUpdate("VALUE")
for the item after the sleep.
For example:
rgbcontroller.sendCommand("240,100,10")
Thread::sleep(500)
rgbcontroller.postUpdate("240,100,10")
Without the sleep or the postUpdate
, the RGB controller does not update its color, even though the item visibly changes in the UI. A shorter sleep sometimes works, but it’s inconsistent.
Question:
Does anyone have an idea why this is happening? Is there a way to avoid adding Thread::sleep
to every rule? It feels inefficient, and the system used to work fine without it.
Any insights or suggestions would be greatly appreciated!
Thanks in advance!