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AD8232 Heart Rate Monitor
We’ll connect five of the nine pins on the board to your Arduino.
The five pins you need are labeled GND, 3.3v, OUTPUT, LO-, and LO+.
The Device is as default is three-electrode circuit also in DC lead off detecion Mode.
+IN and -IN are connected with two 10M to the 3.3v.
AC/DC comnected to the Ground.
Connecting Headers to the Board
By this point, you should have the hardware connected and ready.
DC lead off detection Mode
LOD- or LOD+ pins will be high when the input are not connected.
Original Program for AD8232 Heart Rate sensor.
https://github.com/sparkfun/AD8232_Heart_Rate_Monitor
Note: The code can sketch only through the processing-2.2.1 release.
The device works but results was not so great.
Here my preprocessing program (processing-2.2.1 release)
import processing.serial.*;
Serial myPort; // The serial port int xPos = 1; // horizontal int yPos = 100; float yOld = 0; float yNew = 0; float inByte = 0; int lastS = 0; PFont f;
void setup () { size(1200, 500); println(Serial.list()); // Open whatever port is the one you're using. myPort = new Serial(this, Serial.list()[0], 9600); myPort.bufferUntil('\n'); background(0xff); }
void draw () { int s = second(); PFont f = createFont("Arial",9,false); textFont(f,9); fill(0); if (s != lastS){ stroke(0xcc, 0xcc, 0xcc); line(xPos, yPos+10, xPos, yPos+30); text(s + " Sec.", xPos+5, yPos+30); lastS = s; } }
void mousePressed(){ save(lastS + "-heart.jpg"); }
void serialEvent (Serial myPort) { String inString = myPort.readStringUntil('\n'); if (inString != null) { inString = trim(inString); if (inString.equals("!")) { stroke(0, 0, 0xff); // blue inByte = 1023; // middle of the ADC range (Flat Line) } else { stroke(0xff, 0, 0); //Set stroke to red ( R, G, B) inByte = float(inString); }
//Map and draw the line for new data point inByte = map(inByte, 0, 1023, 0, height); yNew = inByte; line(xPos-1, yPos-yOld, xPos, yPos-yNew); yOld = yNew;
// at the edge of the screen, go back to the beginning: if (xPos >= width) { xPos = 1; yPos+=200; if (yPos > height-200){ xPos = 1; yPos=100; background(0xff); } } else { // increment the horizontal position: xPos++; } } }
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