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Barnard Richards in MATLAB Answers
Letzte Aktivitätam 23 Feb. 2021

mqtt web sockets code publish.single(topic, payload,....does not work.

The example code Publish Using WebSockets in Python on a Raspberry Pi https://au.mathworks.com/help/thingspeak/use-raspberry-pi-board-that-runs-python-websockets-to-publish-to-a-channel.html does not work. my python 3 code executes to the last line of the ThingSpeak example code print ("There was an error while publishing the data.") I have been successfully using the same channelID, writeAPIKey and mqttAPIKey with a Arduino for some time using code at https://au.mathworks.com/help/thingspeak/use-arduino-client-to-publish-to-a-channel.html How do do I identify the error with the web sockets publish code. try: publish.single(topic,payload,... i can print on Terminal the topic and payload strings. they appear correct.

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