Problem sending data from ThignSpeak to Simulink

Question

Vinicio Moya 2020-7-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/560666-problem-sending-data-from-thignspeak-to-simulink

评论： Vinicio Moya 2020-7-9

Hello!

I have a channel in ThingSpeak. Field number 4: Temperature, with some data. But, when I try to read that data in Simulink, I only receive 0... What could be happening?

Simulink model:

Configuration in simulink

ThingSpeak data:

REsponse:

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Christopher Stapels 2020-7-7

Are you sure the R Pi is connected to the WiFi? What is the value at the status output?

Vinicio Moya 2020-7-7

Yes! I’m sure... I’m receiving the data... but always is zero...

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Answer 1

Reeno Joseph 2020-7-9

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https://ww2.mathworks.cn/matlabcentral/answers/560666-problem-sending-data-from-thignspeak-to-simulink#answer_463259

TSTest.PNG

Hello Vinicio,

I just tried to read from your thingspeak channel and got the data. I ran the model in “Monitor & Tune” mode and could see the data. Please check the attachment.

To confirm the issue at your end please share the output of status port and the ‘Diagnostic viewer’

Thanks,

Reeno Joseph

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Vinicio Moya 2020-7-9

I had to reinstall the Run Hardware Pi package and it works... Thanks!

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Answer 2

Vinicio Moya 2020-7-7

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https://ww2.mathworks.cn/matlabcentral/answers/560666-problem-sending-data-from-thignspeak-to-simulink#answer_462503

I´m trying with another blocks, and with this one, it is working. But, I need send this to run over a Raspberry Pi, and I can not use the ThingSpeak Input block. But, here is obviusly that the problem is in the Raspberry Pi ThingSpeakRead block...

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Answer 3

Vinicio Moya 2020-7-8

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https://ww2.mathworks.cn/matlabcentral/answers/560666-problem-sending-data-from-thignspeak-to-simulink#answer_462527

On the other hand, if I use Raspberry Pi ThingSpeak Write block, it is sending all the time a 0. When manually I change that value with a 20, the system write a 20... But, the value of the constant in the left side is just like it doesn´t exists.