Can't Publish Downlinks via MQTT Since 3.25.0 Update

Application Development MQTT
1

Hello,
Since the last upgrade of The Things Stack Cloud to v 3.25.0 on April 3rd, I’ve been experiencing an issue with posting downlinks via MQTT. I am using the following topic for publishing downlinks:

v3/{application_id}@{tenant_id}/devices/{deviceId}/down/replace

I am also listening to the following topic to confirm successful downlinks:

v3/{application_id}@{tenant_id}/devices/+/down/+

I haven’t introduced any significant changes to the code, but it stopped receiving messages.
I’ve already spent a lot of time trying to fix this, without success. I even tried following an advice on a resolved issue, that I thought could be related.
Does anyone know what’s going on with those MQTT topics? Were there any changes that weren’t included in the release notes?

2

Hi, as you’ve also posted on Slack, I’m closing this.

I’d not count this as a double post due to the rather esoteric nature of the question, but please be aware we do prefer to post on just one channel and await a response otherwise we end up with answers split all over the place.

4

Solution on Slack:

OP had too much in his payload, TTI engineer said:

The end_device_ids and correlation_ids fields are not supposed to be part of the payload, per docs. This is the error you are currently encountering most likely.

Fix confirmed by OP

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