MQTT topic /joined

[Jaco Marais]

Good morning,

I am trying to use the MQTT topic /lora/+/joined to see when end devices are restarting in the field. When a device restarts, it has to rejoin the network before it can send packets.

When I tested this idea with the reset button on my development board I noticed that while the device goes through the process of joining the network my mosquitto_sub -t lora/+/joined remains blank.

My lora-network-server.log shows the following:

9:16:5:697|INFO| ED:00-80-00-00-00-00-a6-58|DEV-ADDR|Found End Device in DB 600002d
9:16:5:702|INFO| ED:00-80-00-00-00-00-a6-58|QUEUE-TX|JOIN SIZE: 33
9:16:5:703|INFO| ED:00-80-00-00-00-00-a6-58|JOINREQ-OK|JOINS: 20934 UP: 726499
9:16:5:719|INFO| ED:00-80-00-00-00-00-a6-58|JOIN-ACCEPT|DevAddr: 0600002D
9:16:5:720|INFO| ED:00-80-00-00-00-00-a6-58|SCHED-TX|Use RX1 TOA:1656 ms

Am I trying to use /joined for something it wasn’t designed to do?

Regards,
Jaco Marais

[Jason Reiss]

Try mosquitto_sub -v -t lora/+/joined

The message is blank, only a topic will be sent.

[Jaco Marais]

Thank you!

Works perfectly.

[Author]

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