V4 downlink mqtt message node red not working

ChirpStack (v4)
1

Hi,
I’m trying to send a mqtt downlink message via node red mqtt. It works in v3 so I can see the message queued waiting for an uplink message. If I try to do the same in v4 I don’t see the message queued inside the device application. What I’m doing wrong?

This is the topic
application/xxxxxxxx-91fe-41e8-85d1-1ec497ee32be/device/58a0cb0000108d64/command/down

And this the payload

msg.payload = {
“confirmed”: false,
“fport”: 204,
“data”: “ADwA”
}

return msg;

Regards

2

Hi,
My mistake, this is the correct way to conform the message

msg.payload = {
“confirmed”: false,
“fPort”: 204,
“data”: “ADwA”,
“devEui”: “58a0cb0000108d64”
}

return msg;

3

Hi, I am testing v4 now and I am trying to send downlinks using mqtt. The format you are proposing here, does not work and is also not what is used in the documentation. Having said that, the documented method is also not working for me. Did you get this working?

https://www.chirpstack.io/docs/chirpstack/integrations/mqtt.html

4

Hi, That way worked for me. Are you using the correct port, application id…

5

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6

Perhaps it doesn’t work for you because DevEUI in the topic and the message itself are different. Make sure that everything is in lowercase.