How to give delay between sensors

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cutie_lovely_92
 
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Re: How to give delay between sensors

Post by cutie_lovely_92 »

odometer wrote:But still, it seems that your code is overzealous in detecting heartbeats.

Maybe your "threshold" is too low.
But even after I try 600-900, the result still the same, it will keep rising until 238.

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adafruit_support_rick
 
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Re: How to give delay between sensors

Post by adafruit_support_rick »

I had a look at the pulsesensor website your linked to. Setting thresh to 475 shouldn't cause this problem. However, I would set it back to 512 for now. I think thresh, P, and T should all be initialized to the same number.

Does the pulse sensor work properly if you comment out the call to analogRead(potpin) here?

Code: Select all

  for (int i = 0; i < span; i++) {
//    aRead = aRead+analogRead(potPin);
  }

cutie_lovely_92
 
Posts: 21
Joined: Fri Jan 04, 2013 3:59 am

Re: How to give delay between sensors

Post by cutie_lovely_92 »

driverblock wrote:I had a look at the pulsesensor website your linked to. Setting thresh to 475 shouldn't cause this problem. However, I would set it back to 512 for now. I think thresh, P, and T should all be initialized to the same number.

Does the pulse sensor work properly if you comment out the call to analogRead(potpin) here?

Code: Select all

  for (int i = 0; i < span; i++) {
//    aRead = aRead+analogRead(potPin);
  }
So I have set it back to 512, try playing around with the loop path by moving the temperature sensor code to work after the pulse sensor works and change the delay to (1000). Seems to be working right but not so accurate and often shows BPM=58. And the LM35 only react to room temperature, it doesn't react to any finger touching which actually should. In this case I have also connect it through XBee module to send the data wirelessly to PC.

Does modifying the delay really has an affect?

Here's the part I modify:

Code: Select all

void loop(){
  int span = 20;
  int aRead = 0;
  for (int i = 0; i < span; i++) {
    aRead = aRead + analogRead(potPin);
  }
    aRead = aRead / 20;
    temperature = ((100*5.0*aRead)/1024)*10;   //substitute 5.0V reference for 1.1V reference
    // convert voltage to temperature
    
    if (QS == true){                       // Quantified Self flag is true when arduino finds a heartbeat
        fadeRate = 255;                  // Set 'fadeRate' Variable to 255 to fade LED with pulse
        Serial.print("\n BPM = ");
        Serial.println(BPM);
        QS = false;                      // reset the Quantified Self flag for next time
        
        Serial.print("Analog in reading: ");
        Serial.print(long(aRead));
        //print temperature value on serial monitor
        Serial.print(" - Calculated Temp: ");
        xbee.print(" - Calculated Temp: ");
        printTenths(long(temperature));
     }
  
  ledFadeToBeat();
  delay(1000);                             //  take a break
}
The result obtained:

Code: Select all

Pulse Rate and Body Temperature detector 

 BPM = 52
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 53
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 53
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 54
Analog in reading: 57 - Calculated Temp: 27.8

 BPM = 55
Analog in reading: 57 - Calculated Temp: 27.8

 BPM = 56
Analog in reading: 57 - Calculated Temp: 27.8

 BPM = 57
Analog in reading: 57 - Calculated Temp: 27.8

 BPM = 58
Analog in reading: 57 - Calculated Temp: 27.8

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 57 - Calculated Temp: 27.8

 BPM = 58
Analog in reading: 57 - Calculated Temp: 27.8

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 57 - Calculated Temp: 27.8

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 57 - Calculated Temp: 27.8

 BPM = 114
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 104
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 96
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 89
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 82
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 77
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 72
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 68
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 64
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 61
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3

 BPM = 58
Analog in reading: 56 - Calculated Temp: 27.3
And here's the new attachment of the circuit.
Attachments
Xbee module connected to XBee shield v1.1 to Arduino UNO. Also connected with pulse sensor and LM35.
Xbee module connected to XBee shield v1.1 to Arduino UNO. Also connected with pulse sensor and LM35.
Arduino XBee.jpeg (467.83 KiB) Viewed 803 times
Xbee module connected to PC through XBee Usb adapter
Xbee module connected to PC through XBee Usb adapter
XBee PC.JPG (452.54 KiB) Viewed 803 times

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adafruit_support_rick
 
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Joined: Tue Mar 15, 2011 11:42 am

Re: How to give delay between sensors

Post by adafruit_support_rick »

cutie_lovely_92 wrote:Does modifying the delay really has an affect?
No. The interrupt reads the pulse sensor every 2 milliseconds, regardless of any delay in loop(). You cannot synchronize the pulse and the temperature readings with a delay().

It is possible that switching back and forth between reading the temperature and reading the pulse is causing inaccurate readings.

Without changing anything else, try these two things:
- comment out the call to readAnalog(potPin), and see if the pulse reading is accurate
- restore the call to readAnalog(potPin), comment out the call to analogRead(pulsePin), and see if the temperature is accurate.

cutie_lovely_92
 
Posts: 21
Joined: Fri Jan 04, 2013 3:59 am

Re: How to give delay between sensors

Post by cutie_lovely_92 »

1. I restore the code like previous so the code will be

Code: Select all

void loop(){
      if (QS == true){                       // Quantified Self flag is true when arduino finds a heartbeat
        fadeRate = 255;                  // Set 'fadeRate' Variable to 255 to fade LED with pulse
        Serial.print("\n BPM = ");
        Serial.println(BPM);
        QS = false;                      // reset the Quantified Self flag for next time
     }
  
  ledFadeToBeat();
  delay(20);                             //  take a break
  
  int span = 20;
  int aRead = 0;
  for (int i = 0; i < span; i++) {
    aRead = aRead; //+ analogRead(potPin);
  }
    aRead = aRead / 20;
    temperature = ((100*5.0*aRead)/1024)*10;   //substitute 5.0V reference for 1.1V reference
    // convert voltage to temperature
    // Serial.print("Analog in reading: ");
       // Serial.print(long(aRead));
        //print temperature value on serial monitor
        //Serial.print(" - Calculated Temp: ");
        //xbee.print(" - Calculated Temp: ");
        //printTenths(long(temperature));
 }
Then I do just like what u asked.
driverblock wrote:
cutie_lovely_92 wrote: - comment out the call to readAnalog(potPin), and see if the pulse reading is accurate
RESULT:

Code: Select all

Pulse Rate and Body Temperature detector 

 BPM = 66

 BPM = 67

 BPM = 68

 BPM = 69

 BPM = 70

 BPM = 71

 BPM = 72

 BPM = 74

 BPM = 77

 BPM = 80

 BPM = 85

 BPM = 89

 BPM = 94

 BPM = 99

 BPM = 107

 BPM = 118

 BPM = 129

 BPM = 141

 BPM = 153

 BPM = 164

 BPM = 175

 BPM = 180

 BPM = 188

 BPM = 198

 BPM = 202

 BPM = 207

 BPM = 212

 BPM = 215

 BPM = 210

 BPM = 211

 BPM = 214

 BPM = 220

 BPM = 223

 BPM = 223

 BPM = 217

 BPM = 218

 BPM = 219

 BPM = 219

 BPM = 228

 BPM = 224

 BPM = 224

 BPM = 224

 BPM = 219

 BPM = 219

 BPM = 222

 BPM = 222

 BPM = 216

 BPM = 216

 BPM = 215

 BPM = 218

 BPM = 213

 BPM = 213

 BPM = 211

 BPM = 211

 BPM = 213
Also it only detects every time i put my fingers on it. No continuous heart beat detect.
driverblock wrote:
cutie_lovely_92 wrote: - restore the call to readAnalog(potPin), comment out the call to analogRead(pulsePin), and see if the temperature is accurate.
RESULT:

Code: Select all

Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 67 - Calculated Temp: 32.7
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 53 - Calculated Temp: 25.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 54 - Calculated Temp: 26.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
Analog in reading: 55 - Calculated Temp: 26.8
Analog in reading: 56 - Calculated Temp: 27.3
I put my fingers on the LM35DZ, but the temperature is not affected.

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adafruit_support_rick
 
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Joined: Tue Mar 15, 2011 11:42 am

Re: How to give delay between sensors

Post by adafruit_support_rick »

Alright, so it works for temperature only, but it doesn't work for pulse only. There must be something wrong with your pulse sensor. You are going to have to talk to the pulse sensor people about that. I can't help you with it.

cutie_lovely_92
 
Posts: 21
Joined: Fri Jan 04, 2013 3:59 am

Re: How to give delay between sensors

Post by cutie_lovely_92 »

driverblock wrote:Alright, so it works for temperature only, but it doesn't work for pulse only. There must be something wrong with your pulse sensor. You are going to have to talk to the pulse sensor people about that. I can't help you with it.
will try to contact them. Thanks for the guidance so far.

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miallyrey
 
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Re: How to give delay between sensors

Post by miallyrey »

hello, i was experiencing the same problem now, may i ask how did you solved the problem with your bpm reading. thank you

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