MQTT Message Buffer Not Long Enough

[asymworks]

The Adafruit MQTT library by default seems to cut off published messages at 150 characters, without an obvious way to increase that without patching the library. This is not long enough for HA Auto-Registration messages, or for the sensor JSON data in most cases.

Tracked upstream at adafruit/Adafruit_MQTT_Library#200

[asymworks]

Branched from #1

[asymworks]

Short-term fix is to patch Adafruit_MQTT.h and change MAXBUFFERSIZE to a higher number (e.g. 300), but this will be overwritten when the Adafruit MQTT library is updated.

[mfjonesy]

After patching the Adafruit library I'm now receiving the full message but it's still not showing up in Home Assistant. Here's what the messages look like.

It looks like the actual data from the sensor isn't coming in?

[mfjonesy]

My mistake, I can see the sensors in Home Assistant, but the sensor data isn't coming in. It didn't show up under the devices for the MQTT integration so that's why I didn't see it at first.

Any idea why the sensor data isn't coming through?

[asymworks]

That is odd... you were seeing sensor data come across before, right (at least the partial messages, not necessarily valid JSON)? I'm not sure why changing the buffer length would have had any effect on the sensor data itself. Maybe try a full clean and recompile in case maybe something got weird in the build process?

[mfjonesy]

Well I restarted the device and it seems like it's working now!

Thank you so much for all your hard work helping getting this running!

[asymworks]

Great, glad that was all it took. Hope it continues to work well for you!