Arduino + max30102 + DSP = SpO2

Arduino + max30102 + DSP = SpO2

Once I saw an oximeter on Ali, I wondered how it worked. And when I figured it out, I was surprised at its simplicity and decided to repeat it.

Having figured it out a little, it turned out to be not so complicated and ended up with the following modules:

• ready-made measuring module for max30102 (heart of oxygenation measurement). The module can of course be any, the main thing is that based on max30102.

  
  
  
  
  

• brains to control the above, a module on stm32f103.

  
  
  
  
  

• and then where to put all this led display on the i2c. 

  
  
  
  
  

- : https://github.com/Jasoji/stm32-max30102  , .

, Eclipse.

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, . , 60-80, . . , .

. max30102.c  max30102_cal, :

if (R >= 0.36 && R < 0.66)

   spo2 = (uint8_t)(107 - 20 * R);

else if (R >= 0.66 && R < 1)

   spo2 = (uint8_t)(129.64 - 54 * R);
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

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, ( max30102 ). , .

, max30102 . , . .

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if(s.red > s.iRed) {	//        <o:p>

        sampleBuff[0].red = s.iRed;

    	    sampleBuff[0].iRed = s.red;

    } else {

    	    sampleBuff[0].red = s.red;

    	    sampleBuff[0].iRed = s.iRed;

}
      
      

        
        
        
      

    
        
        
        
      
      

        
        
        
      

    
    

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108, 101. . , . . , :

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SpO2 = aR²+bR+c 

 

R = (ACred/DCred) / (ACired/DCired) 

a,b,c - ( , ). max30102  .

ACred - .

DCred -  . .

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