Downlink via MQTT not possible

1

Hi Chirpstack Lovers,

i am desperatly trying to scheduele a Downlink via MQTT, unfortunatly this donwlink does not arrive in the Backend and also not on the Sensor. The Downlink arrives in the MQTT Broker of the Server. I dont understand if the topic is wrong or the payload. I tried everything as described and it was working in V3.

Is there anything special in V4 i dont see?

grafik
grafik403×600 11.8 KB

1 Like
2

In the payload try the tag ‘fPort’ instead of ‘fport’

3

I had similar struggles. I finally realized that 'fPort" needed to have the ‘p’ capitalized.

payload_append(“{”);
payload_add(“devEui”, “"ff00000000000b03"”, 1);
payload_add(“confirmed”, “true”, 1);
payload_add(“fPort”, “30”, 1);