Read data from channel twice a day

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John
John on 29 Sep 2023
Commented: John on 4 Oct 2023
Hi,
I am new to thingspeak and not familiar to Matlab. May you can help me to do a simple calculation on daily basis. I have the following requirement that I am not able to implement.
  1. read data from channel A at 6 am and store data into varA
  2. read data from channel A at 10 pm and store data into varB
  3. calculate varC = varB - varA
  4. display varC as barchart
These four steps above should be execute on a dayily basis.
Would be nice if some could help!
Thanks
Viktor

Answers (1)

Hans Scharler
Hans Scharler on 30 Sep 2023
You need three TimeControls that call thee MATLAB Analytics scripts (thingSpeakRead / thingSpeakWrite) and then one final MATLAB Visualization to make a bar chart. I would break the problem down just like you described and start with the MATLAB script to read and write to a channel. Then, add the TimeControls to run them.
  1 Comment
John
John on 4 Oct 2023
Hi Hans,
Thanks for the hint. I was now able to solve my issue.
BR, Viktor

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