[SOLVED] Can't get mqtt binding to work

HomerJ.S · February 8, 2018, 9:14pm

Hi community,
I´ve a working Sonoff Tasmota S20 device, a working Mosquitto Broker and even an working fhem connection. But I can´t get the openhab mqtt binding to work. I followed a youtube tutorial, and after that doesn´t work I tried a lot to solve the problem.
And I think I did not completely understand the mqtt binding.

To my configuration:
My sonoff device:
MQTT Host 192.168.1.3
MQTT Port 1883
MQTT client & Fallback topic sonoff-A2F78A
MQTT-Benutzer mqtt
MQTT topic sonoff-A2F78A
MQTT group topic sonoffs
MQTT full topic cmnd/sonoff-A2F78A/

My mqtt.cfg (copied from /var/lib/openhab2/config/org/openhab/mqtt.config)
192.168.1.3=“tcp://localhost:1883”
.clientId=“Openhab2”
.pwd=“XXXXXX”
.url=“tcp://localhost:1883”
.user=“mqtt”
#.clientId=“openhab2”
#.url=“tcp://localhost:1883”
#broker.clientId=“openhab2”
#broker.url=“tcp://localhost:1883”
#raspi.clientId=“openhab2”
#raspi.url=“tcp://localhost:1883”
service.pid=“org.openhab.mqtt”

My defined items:
Switch Sonoff_Steckdose1 “Steckdose1” (LR,gLight)
{ mqtt=">[broker:cmnd/sonoff-A2F78A/POWER:command:ON:ON],
<[broker:stat/sonoff-A2F78A/POWER:state:default]" }

Switch MQTT_Test “Testing…” { mqtt="<[broker:testing/mqtt/topic:state:default], >[broker:testing/mqtt/back-topic:command:*:default]" }

(when I change the switch.items there is no error in the log, so I think the syntax should be OK)

The items are defined in a sitemap, when I toggle this switch a entry in the events.log appears. But no message arrives by the broker, checked by mqtt.fx.

For understanding, do I need to config something in the mqtt-eventbus.cfg? Some tutorials do so, others not?

Thank you for your help!!!

Dim · February 9, 2018, 5:58am

careful
/etc/openhab2/services/mqtt.cfg is the file that you should configure.
You shouldn’t modify /var/lib/openhab2/config/org/openhab/mqtt.config since this one is created automatically from the mqtt.cfg and it has a different syntax (it includes quotes)

So: delete mqtt.config, fix your mqtt.cfg and try again (restart OH2)

broker.url=tcp://127.0.0.1:1883
broker.clientId=openhab2
broker.clientId=mqtt
broker.pwd=XXXXXX

no, no need to enable the MQTT EventBus, so no need to configure anything there.

HomerJ.S · February 9, 2018, 6:32pm

Hi,
thank you for your reply, now it works!!! Yeahhh!!!

I always thought in the mqtt.cfg the < > have to stay in the file.
In the past I edited the other file in (/var/lib/openhab2/config/org/openhab/mqtt.config) because a change in the mqtt.cfg made an additional entry and so I had two brokers defined, and that caused errors in the log. So I commented the old entries out.

Now it´s working, thank you.