[SOLVED] MQTT items stopped working

Setup, Configuration and Use Items & Sitemaps
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  • Platform information:
    • Hardware: Intel NUC 8GB /128GB SSD
    • OS: Ubuntu Server 16.04
    • Java Runtime Environment:OpenJDK Zulu
    • openHAB version:2.20 with Openhabian 1.4

This items file was working fine until recently:

Number OilDepth "Depth [%d cm]" (g1) { mqtt="<[broker:RTL_433/JSON:state:JSONPATH($.depth):.*\"id\" \\: 137574874,.*]"}
Number OilTemp "Oil Temperature [%.2f °C]" (g1) { mqtt="<[broker:RTL_433/JSON:state:JSONPATH($.temperature_C):.*\"id\" \\: 137574874,.*]"}
Number PowerMeter "Power [%d W]" (g1) { mqtt="<[broker:RTL_433/JSON:state:JSONPATH($.power0):.*\"dev_id\" \\: 77,.*]"}

It capures the topics generated by a power consumption meter and an Oil depth gauge. The MQTT topic looks like this:

{"time" : "2018-01-23 18:48:16", "model" : "CurrentCost TX", "dev_id" : 77, "power0" : 1490, "power1" : 0, "power2" : 0}
{"time" : "2018-01-23 18:48:18", "model" : "Oil Watchman", "id" : 137574874, "flags" : 128, "maybetemp" : 25, "temperature_C" : 6.667, "binding_countdown" : 0, "depth" : 31}
{"time" : "2018-01-23 18:48:22", "model" : "CurrentCost TX", "dev_id" : 77, "power0" : 1502, "power1" : 0, "power2" : 0}

mqtt.cfg:

broker.url=tcp://127.0.0.1:1883
broker.clientId=openHAB2

It was working and I could see values being recorded in the logs, but I can’t figure out why it stopped.
If I save the items file, I can see it reloading but still no values recorded:

2018-01-23 17:01:13.254 [INFO ] [el.core.internal.ModelRepositoryImpl] - Refreshing model 'mqtt.items'

2018-01-23 17:01:13.265 [DEBUG] [.internal.MqttGenericBindingProvider] - Removing message consumers for item OilDepth

2018-01-23 17:01:13.275 [DEBUG] [.internal.MqttGenericBindingProvider] - Removing message publishers for item OilDepth

2018-01-23 17:01:13.286 [DEBUG] [.internal.MqttGenericBindingProvider] - Removing message consumers for item OilTemp

2018-01-23 17:01:13.297 [DEBUG] [.internal.MqttGenericBindingProvider] - Removing message publishers for item OilTemp

2018-01-23 17:01:13.308 [DEBUG] [.internal.MqttGenericBindingProvider] - Removing message consumers for item PowerMeter

2018-01-23 17:01:13.319 [DEBUG] [.internal.MqttGenericBindingProvider] - Removing message publishers for item PowerMeter

2018-01-23 17:01:13.331 [DEBUG] [binding.mqtt.internal.MqttItemConfig] - Loaded MQTT config for item 'OilDepth' : 1 subscribers, 0 publishers

2018-01-23 17:01:13.344 [DEBUG] [binding.mqtt.internal.MqttItemConfig] - Loaded MQTT config for item 'OilTemp' : 1 subscribers, 0 publishers

2018-01-23 17:01:13.357 [DEBUG] [binding.mqtt.internal.MqttItemConfig] - Loaded MQTT config for item 'PowerMeter' : 1 subscribers, 0 publishers

I have stopped OpenHAB and cleared the cache, as well as uninstalling and re-installing the MQTT binding, I enabled DEBUG logging on the binding but it also showed nothing.
Any ideas would be most welcome!

2

are it just those items that dont work or is your entire MQTT not working?
Did you recently upgrade?

I have had something similar recently and odly my MQTT binding only started working again after i reinstalled both the MQTT binding AND the MQTT action

1 Like
3

That’s all I have in the items file. Just now I added this to try to debug it some more:

String MQTT_Uptime “MQTT Uptime [%s]” {mqtt="<[broker:$SYS/broker/uptime:state:default]"}

It should create a log entry every few seconds, but still nothing after it loads the items file.

4

As a test, I copied the items file over to a Windows install of OH 2.2 and pointed mqtt.cfg at the same mosquitto server, and I can see the entries being recorded in the logs.

5

Hey, @Kees_van_Gelder, many thanks it was the MQTT action binding that was causing the problem. Reinstalling it fixed the problem.

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6

Great that that fixed it for you. I already had a hunch that was the problem

7

I seem to have the same problem (upgrade of OH), and already re-installed the binding. I never had the action installed though. I see absolutely no messages in my log anymore. Tested the broker with mqtt-spy and it worked, but openhab seems like it doesnt subscribe or connect to the broker anymore.

As i have no errors to work with - what can i do?

edit: installed the mqtt action for good measure, but i cant publish anything with it.

edit2: re-installing the binding, restarting OH and restarting the Access Point did nothing, but restarting the devices that work with MQTT changed something. Now i get updates via MQTT in OH again (still no log entrys like prior to the OH upgrade though). Will report if i stumble across anything else.