MATLAB: Thingspeak – upload stopped working on all channels simultaneously

ThingSpeak

I'm on a free licence. My uploads stopped a day ago. Account shows that messages are not expired.
License Type: Free
Expiration Date: 27 Nov 2020
Available Remaining
Messages 3 000 000 2 899 830
Channels 4 1

Best Answer

I think this has to do with your device connectivity or something on that end.
To confirm, can you try logging in to ThingSpeak, creating a new channel and ingesting a single point into the channel using your browser? Instructions on ingesting data into the channel from a browser are in the "API keys" tab of your channel (or, see documentation here https://www.mathworks.com/help/thingspeak/writedata.html)
If it works from the browser, you can focus your investigations on the device end.
Related Question