Hi all, I am on OH 3.0.1. Today I have spent the whole day trying to make the modbus binding work without getting it to work properly. First of all, the good news: this configuration works (and is the only one that works): Bridge modbus:serial:evolink [ port="/dev/ttyUSB0", id=10, baud=19200, st…

[image] oppo1967p: I am on OH 3.0.1. There has been work on the serial handling since release. Try the snapshot version. [image] openHAB 3 runs out of memory / java heap space errors, CPU 100%+ after a few hours Installation For anyone looking to test t…

I’m sorry but I’m unsure why you quoted this. That fix was for a memory leak in the rules engine.

I muffed that link,for shame. The advice applies -there have been serial improvements for re-connect failures since 3.0

For me it worked. thanks rossko57 EDIT: didn’t work

I replied too early… After some time it stops working with the same error.

Have you configured serial port according to this Serial Port Configuration | openHAB port-configuration? That could explain the permissions issue Please be aware of known issues with serial devices with openhab3 (regression in serial library used by openhab) Serial ports getting blocked after some…

I read all those threads. I gave up with this binding. It’s not usable. I have written my own rules to query the modbus unit using the modpoll command line utility. Works perfectly and absolutely reliable 100%.

As the binding maintainer I am sorry to hear it. However the fix for serial slaves is out of my reach as the issue is with external library used by openHAB and the issue itself is way too low level to be tractable. Would you care the share the rules? Others might benefit from this as well.

Hi @ssalonen I didn’t mean to minimize your work. We all appreciate all the efforts that all of you put in this project. And I know what it means to be in charge of an open source project as I am a contributor too to another domotic open source project (EspEasy). I found your binding excellent an…

[image] oppo1967p: Regarding the serial port, unfortunately it’s not working. Note that for everybody else,it does work. But some serial users run into troubles after a while, where it appears a routine error recovery falls in hole. Not working at all from the start still suggests that you …

MODBUS binding problem with serial connection

Add-ons Bindings

rossko57 (Rossko57) February 26, 2021, 7:10pm 2

There has been work on the serial handling since release.
Try the snapshot version.