Can I subscribe my channel(s) with MQTT with a free license?

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Johan Vervaet 2021-12-1

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评论： Johan Vervaet 2022-2-6

I am using a free license for publishing data with MQTT on ThingSpeak which works very good,

according to the format: channels/<channelID>/publish/fields/field<fieldnumber>.

Can I subscribe my channel(s) with MQTT with a free license with the format:

channels/<channelID>/subscribe/fields/field<fieldnumber>.

Or is there any restriction?

Thanks for your answer and best regards.

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Fred Ettner 2022-2-6

Johan, I'm trying unsuccesfuly to do the same. What micropython MQTT library areyou using?

Johan Vervaet 2022-2-6

Hello Fred,

I have tried the following even on different micropython versions on ESP32:

1) import upip, upip.install('micropython-umqtt.simple'), upip.install('micropython-umqtt.robust'), or

2) import upip, upip.install('micropython-umqtt.simple2'), upip.install('micropython-umqtt.robust2').

Unfortunately unsuccessfull with the subscribe format channels/<channelID>/subscribe/fields/field<fieldnumber>.

Regards.

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Vinod 2021-12-31

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Yes. Even a free license enables you to publish and subscribe to ThingSpeak channels. Note that you may still only publish to a channel once every 15 seconds with a free license.

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Johan Vervaet 2022-1-3

Hello Vinod,

I appreciate your answer very much, but unfortunately I am not using ESP8266 on arduino.

I am using ESP32 on Thonny IDE with micropython: do you have any information for that environment?

Thanks and best regards.

Vinod 2022-1-3

I'm not familiar with that environment, unfortunately. Have you tried subscribing to your channel using a desktop client like mqttx and publishing data to it?

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