Is Thingspeak MQTT reliable?
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I have a couple of NodeMCUs that are sending data to TS every 30 minutes since 2018, with no issues, using ThingSpeak API. These days I tried to give MQTT a chance, so I changed my code in order to use ThingSpeak MQTT broker to publish my data. I followed the code example from this page.
The result is really disappointing: while the devices are still sending the data every 30 minute (with no error codes) the data is not published every time, so I have my chart full of "holes". Sometimes they are published once an hour, some other every 2 hours, randomly.
I have checked the code many times, but it is quite straight-forward, so I have the suspect that the QoS=0 is not giving the best results.
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Vinod
le 30 Déc 2020
I just tried this example for a few hours, admittedly it is on a Raspberry Pi, and had reliable results with no "holes" in the data. If your code on the NodeMCU is substantially different, can you share that so we may use that to help you troubleshoot? (Please mask/delete any API keys or credentials in your code you share)
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