How do I debug my MQTT connection?

Support
1

Disclaimer: I’m pretty new to running Meshtastic

I’m running Meshtastic 2.1.17.7ca2e81 on my TTGO T-Beam 1.1, which is plugged into my computer.

I think I configured MQTT appropriately:

meshtastic --port /dev/ttyUSB0 --get mqtt
Connected to radio
mqtt:
enabled: true
address: "192.46.234.66"

I set up an MQTT server with a static IP address. I started with the server configured with a username and password, then swapped to allow anonymous connections because it’s not going well.

On my computer I can do:

mosquitto_pub -h 192.46.234.66 -t "topic" -m "message"

and see

mosquitto_sub -v -h 192.46.234.66 -t '#'
topic message

Nothing seems to be showing up from Meshtastic though? I’m not really sure what to look for in meshtastic --port /dev/ttyUSB0 --debug, nothing looks like it’s obviously blowing up. Wi-Fi is also enabled and appears to be working (if I disconnect from the computer and power it externally, I can access meshtastic.local and connect to the device over Wi-Fi, so I assume internet access is also working).

Any thoughts?

2

Did you enable uplink and downlink for the channels you want to go over MQTT?

3

One or more channels must also be enabled as uplink and/or downlink for packets to be transmitted from and/or to your mesh (See channels)

I sure didn’t. I’ll give that a shot.

Edit:: Yep - it works immediately.

4

The docs say:

Without these settings enabled, the node will still connect to the MQTT server but only send status messages.

I didn’t see any status messages showing up on the MQTT server. I think I’ve been looking at it too long, but what does this line mean? What’s this referring to?