I have a code for data acquisition n plotting from one sensor how do write the code for three sensors such that I plot three graphs of different color in same figure

clear all
close all
clc;
a = arduino();
tmax = 50;
figure(1),
grid on,
title('pulse sensor Analog Voltage Real Time Data Graph')
xlabel ('Time (s)'), ylabel('Voltage');
axis([0 tmax+1 -0.5 5.5]);
k = 0;
v = 0;
t = 0;
tic 
while toc<= tmax
    k = k + 1;
    v(k) = readVoltage(a,'A0');
    t(k) = toc;
    
    if k > 1
        line([t(k-1) t(k)],[v(k-1) v(k)]);
        drawnow;
    end
end

[Amit Kadarmandalgi]

#define USE_ARDUINO_INTERRUPTS true
#include <PulseSensorPlayground.h>
const int OUTPUT_TYPE = SERIAL_PLOTTER;

/*
   Number of PulseSensor devices we're reading from.
*/
const int PULSE_SENSOR_COUNT = 3;

const int PULSE_INPUT0 = A0;
const int PULSE_BLINK0 = 13;    // Pin 13 is the on-board LED
const int PULSE_FADE0 = 5;

const int PULSE_INPUT1 = A1;
const int PULSE_BLINK1 = 12;
const int PULSE_FADE1 = 11;

const int PULSE_INPUT2 = A2;
const int PULSE_BLINK2 = 10;    // Pin 13 is the on-board LED
const int PULSE_FADE2 = 9;

const int THRESHOLD = 550;   // Adjust this number to avoid noise when idle

/*
   All the PulseSensor Playground functions.
   We tell it how many PulseSensors we're using.
*/
PulseSensorPlayground pulseSensor(PULSE_SENSOR_COUNT);

void setup() {
  Serial.begin(250000);

  pulseSensor.analogInput(PULSE_INPUT0, 0);
  pulseSensor.blinkOnPulse(PULSE_BLINK0, 0);
  pulseSensor.fadeOnPulse(PULSE_FADE0, 0);

  pulseSensor.analogInput(PULSE_INPUT1, 1);
  pulseSensor.blinkOnPulse(PULSE_BLINK1, 1);
  pulseSensor.fadeOnPulse(PULSE_FADE1, 1);

  pulseSensor.analogInput(PULSE_INPUT2, 2);
  pulseSensor.blinkOnPulse(PULSE_BLINK2, 2);
  pulseSensor.fadeOnPulse(PULSE_FADE2, 2);
 
  pulseSensor.setSerial(Serial);
  pulseSensor.setOutputType(OUTPUT_TYPE);
  pulseSensor.setThreshold(THRESHOLD);


  // Now that everything is ready, start reading the PulseSensor signal.
  if (!pulseSensor.begin()) {
    for (;;) {
      // Flash the led to show things didn't work.
      digitalWrite(PULSE_BLINK0, LOW);
      delay(50);
      digitalWrite(PULSE_BLINK0, HIGH);
      delay(50);
    }
  }
}

void loop() {

  delay(200);

  // write the latest sample to Serial.
  pulseSensor.outputSample();

  for (int i = 0; i < PULSE_SENSOR_COUNT; ++i) {
    if (pulseSensor.sawStartOfBeat(i)) {
      pulseSensor.outputBeat(i);
    }
  }
}

[anil simsek]

I have Arduino code, I want to draw it instantly in matlab. Can you help me

[Walter Roberson]

The frameworks people have posted should work, provided that you do not need more than about 40 Hz. (But I do recommend animatedline() instead of continually doing line())

Answer 1

[madhan ravi]

hold on

Answer 2

[Walter Roberson]

line() can accept a 'color' option.

However, it is inefficient to draw a line between every pair of points. You should look at animatedline() which permits you to addpoints()

Answer 3

[Amit Kadarmandalgi]

clear all
close all
clc;
a = arduino();
tmax = 50;
figure(1),
grid on,
title('pulse redings')
xlabel ('Time (s)'), ylabel('Voltage');
axis([0 tmax+1 -0.5 5.5]);
c= 0;
v= 0;
p=0;
k=0;
t = 0;
tic 
while toc<= tmax
    c = c + 1;
    v(c) = readVoltage(a,'A0');
    w(c) = readVoltage(a,'A1');
    x(c) = readVoltage(a,'A2');
    t(c) = toc;
    if c > 1
        line([t(c-1) t(c)],[v(c-1) v(c)],'color','blue');
        hold on
        line([t(c-1) t(c)],[p(c-1) p(c)],'color','red');
        hold on
        line([t(c-1) t(c)],[k(c-1) k(c)],'color','green');
        drawnow;
    end
end

[Amit Kadarmandalgi]

thanks for the answers .... managed to figure it out this is the code if someone is in a simillar situation