Code on RPi Pico #4

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1. n-elia commented on May 20, 2021

   

   n-elia

   on May 20, 2021

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   Hi ebolisa!
   First of all, let me know which is your particular board, and which is your sensor (the original Maxim, or a clone?).
   Then, please try to scale the y-axis, e.g., plot the Columna B only with an y-axis ranging from 18000 to 22000.
   Thank you!
2. ebolisa commented on May 20, 2021

   

   ebolisa

   on May 20, 2021

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   Thanks for getting back to me.
   I'm using the Raspberry Pi Pico and the sensor board may be a clone: https://www.pantechsolutions.net/max30102-pulse-oximeter-heart-rate-sensor-module-i2c-interface.
   As for the graph, I'm using OpenOffice and I don't control it that well so I'm attaching some raw data.
   data.csv
   
   EDIT:
   Updated sensor's link.
3. ebolisa commented on May 20, 2021

   

   ebolisa

   on May 20, 2021

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   Ok, Made progress. Had a crash course on Calc.
   But how do I output in a range from 0 to 100% for Oxy. And < 200 for HR?
   TIA
   
4. n-elia commented on May 20, 2021

   

   n-elia

   on May 20, 2021

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   You're very welcome.

   So, as I could see in your link, this is a MAX30100, so I am not sure that this library will work. However, we can further investigate. Let's check something:

   1. The csv that you posted contains 26 points only. if I remember well, with the default settings, the sensor will provide 50 samples per second, therefore you should plot at least 200 samples (4 seconds) to see an heart signal that makes sense.
   2. You can easily check the acquisition frequency with the code proposed in the readme; please make sure to have at least 50Hz

   # Get the estimated acquisition rate
   acquisition_rate = sensor.getAcquisitionFrequency()
   

   3. How are you logging data? Is it fast enough to get all the samples?

   Let me know!
5. n-elia commented on May 20, 2021

   

   n-elia

   on May 20, 2021

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   Nice to see that it works well!

   You have to do some math to obtain SpO2 and HR. I put some hints in the last lines of the readme, here.

   Please share your code if you manage to perform those computations locally, I am interested, too!
6. ebolisa commented on May 20, 2021

   

   ebolisa

   on May 20, 2021

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   Sorry, I posted the wrong sensor's link so, I updated my post.
7. ebolisa commented on May 20, 2021

   

   ebolisa

   on May 20, 2021

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   Will do. Thanks again.
8. n-elia commented on May 20, 2021

   

   n-elia

   on May 20, 2021

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   Fine! Then, I'm going to close this issue.

   Please feel free to open a topic in the "Discussion" section if you want to look for help for implementing HR/SPO2 evaluation, or if you want to share some progresses.

   Bye,
   Nicola
9. n-elia

   closed this as completedon May 20, 2021
10. n-elia

    self-assigned this

    on May 20, 2021
11. n-elia

    added

    good first issueGood for newcomersGood for newcomers

    on May 20, 2021
12. Repository owner locked and limited conversation to collaborators on Jul 17, 2021