MQTT subscription via Nodered connected but no data

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Vladimir Synek 2023-5-14

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https://ww2.mathworks.cn/matlabcentral/answers/1963084-mqtt-subscription-via-nodered-connected-but-no-data

评论： Chris B 2023-5-15

I have MQTT subscription to my channels for a long time. Everything worked till Friday May 12th, 2023 at time approx. 18:16 UTC. From that moment MQTT nodes in Nodered have status Connected, but no data are coming in via MQTT. My data are uploaded to Thingspeak regulary and visible in my channels. There were no changes to my settings at that time. Any idea what has changed ?

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Chris B 2023-5-14

移动：Christopher Stapels 2023-5-15

Hi,

Just adding that I am seeing this as well. I was working on the server side of my application today ( not the code that connects though) when I noticed no data coming in from Thingspeak. Data is getting to my channel from my sensor, and my application subscribes without error, but then silence; no data moving from Thingspeak to the channel. Last data from the channel was sent around 6 pm GMT May 12, 2023.

Vladimir Synek 2023-5-14

移动：Christopher Stapels 2023-5-15

Chris thank you for your confirmation that something happend on Thingspeak side. We will see if the issue will be recognized and solved.

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采纳的回答

Christopher Stapels 2023-5-15

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https://ww2.mathworks.cn/matlabcentral/answers/1963084-mqtt-subscription-via-nodered-connected-but-no-data#answer_1235919

编辑：Christopher Stapels 2023-5-15

The MQTT subscription service was purged and restarted today just after 1 p.m, and is now working as expected. No messages sent to ThingSpeak have been lost, but MQTT devices did not get messages from channels they were subscribed to since Friday, May 12. While this is consistent with the QoS 0 policy, we expect the service to return to normal now and maintain its historically high uptime.

If you continue to see missing subscription messages, please let us know here.