MQTT retain flag not applied

Dinant · Post by **Dinant** » Mon 01 Apr 2024 12:03 pm

Cumulus MX 3.28.6 b3283
I've created a custom mqtt upload file. If I add the property "retain": true to the topic the value is not published with a retained flag. I've restarted CumulusMX after the change and checked this with MQTT Explorer.

Dinant · Post by **Dinant** » Mon 01 Apr 2024 1:40 pm

I see I've made a typo in the mqtt file instead of "retain": true I've used "retain": "true". I don't know if that causes the problem.
Second the MQTT Explorer only shows the retain flag when the client subscribes after the initial publish.

mcrossley · Post by **mcrossley** » Mon 01 Apr 2024 5:39 pm

Dinant wrote: ↑Mon 01 Apr 2024 1:40 pm I see I've made a typo in the mqtt file instead of "retain": true I've used "retain": "true". I don't know if that causes the problem.

I'm not sure, I've never tested it, but the correct syntax would be "retain":true

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MQTT retain flag not applied

MQTT retain flag not applied

Re: MQTT retain flag not applied

Re: MQTT retain flag not applied