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oxullo / Arduino-MAX30100

Arduino library for MAX30100, integrated oximeter and heart rate sensor
GNU General Public License v3.0
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Big values for GY-MAX30100 #91

Open PaulaStef opened 1 year ago

PaulaStef commented 1 year ago

Troubleshooting checklist

The GY-MAX30100 sensor gives wrong values for heart rate - the values are mostly to big, sometimes it gives non-zero values even when I'm not touching the sensor. I changed the IR led current to pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA) and this way it gives 0 when I dont touch the sensor but it still gives large value for HR.

Tester Output:

Initializing MAX30100..Success Enabling HR/SPO2 mode..done. Configuring LEDs biases to 50mA..done. Lowering the current to 7.6mA..done. Shutting down..done. Resuming normal operation..done. Sampling die temperature..done, temp=0.00C WARNING: Temperature probe reported an odd value

Press any key to go into sampling loop mode

I connected the sensor to an Arduino MEGA 2560 Vin- 3.3V GND-GND SCL-SCL SDA-SDA

Output : Heart rate:119.47bpm / SpO2:95% Beat! Beat! Heart rate:144.82bpm / SpO2:96% Beat! Beat! Beat! Beat! Heart rate:186.02bpm / SpO2:95% Beat! Beat! Beat! Beat! Heart rate:227.04bpm / SpO2:94% Beat!

Arduino IDE version 2.0.3 I got the zip archive from the master branch and added to arduino library

this is the sensor I used - https://www.sigmanortec.ro/senzor-puls-optic-gy-max30102?gclid=CjwKCAjw04yjBhApEiwAJcvNoe6ep7EQXLRGdOR0HxnFfKtAWjC-iBOqamjsQUAgWZ4-ppDLwpj9ohoChpAQAvD_BwE

Guiaochino commented 1 year ago

I am also having this problem with my GY-MAX30100. Is there any way that we can fix this?

BloggingKIng commented 1 year ago

Hi did any one of you solved this problem? I am facing the same problem

PaulaStef commented 1 year ago

@BloggingKIng I manage to reduce the values a little by changing some values from MAX30100_beatDetector.h. I changed a bit the threshold values and it did lower the values. I believe that it would also help to change the frequency values from butterworth filter, although I did not try that. I still get some spikes now and then but I used a median filter and is working decent enough.

BloggingKIng commented 1 year ago

@PaulaStef thanks for your reply. My problem is that actually Max30100 sends random values and some time eventually stops sending values. I will then have to reset Arduino Uno to get it working back again.

I am interested in that median filter thing. Can you tell m, how did you implement it?

PaulaStef commented 1 year ago

@BloggingKIng I stored 5 consecutive values of pulse from the sensor in an array, sorted it and then a used the value in the middle instead of the current value that the sensor gave (at index 2 starting from 0). When you get a new value you replace it with an existing one in the array. This filter is usually used to reduce noise in images but it worked pretty well.

BloggingKIng commented 1 year ago

ok I will try this. Also, thanks for your responses