Analyzing sensor data on ThingSpeak through the MATLAB Analysis.

Hi, I have a few sensors which send data to the thingspeak platform and the data is being displayed correctly. I am trying to analyze this data in MATLAB to detect a pattern and if possible create an alert. Example if someone walks into a room and creates noise or vibrations within a certain frequency it can detect and create an alert. The data I am getting in MATLAB is in the form of a wave therefore setting parameters or being able to extract only data with a certain frequency and display it as an alert would be ideal. How do I approach this? Sorry, very limited programming skills.

[Star Strider]

I’m not sure what that plot image demonstrates, however to detect frequencies in a certain range, the best option is n analogue or digital bandpass filter. These are straightforward to design and implement. Calculating the Fourier transform is not necessary.

[Ritch]

Thank you.

The image was an example. So if I only wanted to record the frequencies for e.g above 0.2 and -0.2 I would only need to use a filter. Also can I set an alert or statement to highight everytime this occurs?

Answer 1

[Christopher Stapels]

You can use the Alerts API to create an alert based on a condition you calculate in MATLAB code.After you apply the bandpass filter, call the API to send an email to your MathWorks account address.

[Ritch]

Thank you Christopher, much appreciated.

[Christopher Stapels]

You are welcome, but @Star Strider had the helpful advice first, I just know the links to copy.