Chirpstack MQTT service in integration how decode payload content

[xthons]

Use golang language to subsribe mqtt service, but playload message is like picture that. no json format. how to decode payload content body?
Thinks!

[bconway]

By default, integrations are in protobuf format, and use the definitions located in the ‘/api’ directory of the ChirpStack repo. Since you’re working in Go, I would recommend sticking with protobuff for performance and strong typing, over flipping it to JSON.

[brocaar]

Please note that this configuration is for the application/..... topics. The data you are looking at is for the gateway topics. You might want to subscribe to application/# to make sure you are reading the correct data.

[xthons]

Thank you for response！When I try to parse the payload data, I encounter an error, ‘cannot parse invalid wire-format data.’ How can I handle this issue? Thanks again.

[bconway]

Not every payload that comes off the application topic (top-level) will be an uplink event. You haven’t posted the code that you used to subscribe to a topic, so we don’t know. See also:

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

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

[xthons]

Topic:application/d2db7767-56a4-4790-a275-61a992b95cdf/device/d896e0ff00000240/event/up

I apologize for the interruption again. After obtaining the payload through MQTT on my end, I attempted to decode it directly using Protocol Buffers (proto). However, I encountered an error as shown in the screenshot. Thank you!