Read data from channel twice a day

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

Answer 1

[Hans Scharler]

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.

[John]

Hi Hans,

Thanks for the hint. I was now able to solve my issue.

BR, Viktor