Plotting a scrolling Graph

Processing Electronics (Arduino, etc.)
13

well… i am a student and i had to programm 3 sensors. ( pressure, temperature and density). The sensor has to recalculate the variables to make it celcius and kPa and %. so, here is my code;

#include "DHT.h" //Activatie van de luchvochtigheid en temperatuur sensor.
#include<Wire.h> //Activatie van de druk sensor.
#define DHTPIN 2     // De gekozen pin die we aangesloten hebben.
#define DHTTYPE DHT22   // De luchtvochtigheid en temperatuursensor.
#define Addr 0x60 //adress van sensor MPL115A2.
int maxHum = 60; // Een maximale luchtvochtigheid waarde voor het programma.
int maxTemp = 40; // Een maximale temperatuur waarde voor het programma.

DHT dht(DHTPIN, DHTTYPE);

unsigned int data[8];
float a1 = 0.0, b1 = 0.0, b2 = 0.0, c12 = 0.0;

void setup() {

    //luchtvochtigheid en temperatuur sensor
  Serial.begin(9600); 
  dht.begin();

    //temperatuur en druk sensor
  // Initialise I2C communication
  Wire.begin();
  // Initialise Serial Communication, set baud rate = 9600
  Serial.begin(9600);

  for (int i = 0; i < 8; i++)
  {
    // Start I2C Transmission
    Wire.beginTransmission(Addr);
    // Select data register
    Wire.write(4 + i);
    // Stop I2C Transmission
    Wire.endTransmission();

    // Request 1 byte of data
    Wire.requestFrom(Addr, 1);

    // Read 1 byte of data
    // A10 msb, A10 lsb, Bb1 msb, Bb1 lsb, B2 msb, B2 lsb, C12 msb, C12 lsb
    if (Wire.available() == 1)
    {
      data[i] = Wire.read();
    }
  }

  // Convert the data to floating points
  a1 = ((data[0] * 256.0) + data[1]) / 8.0;
  b1 = ((data[2] * 256) + data[3]);
  if (b1 > 32767)
  {
    b1 -= 65536;
  }
  b1 = b1 / 8192.0;
  b2 = ((data[4] * 256) + data[5]);
  if (b2 > 32767)
  {
    b2 -= 65536;
  }
  b2 = b2 / 16384.0;
  c12 = ((data[6] * 256.0 + data[7]) / 4.0) / 4194304.0;
  delay(300);
}

void loop() {

  //luchtvochtigheid en temperatuur sensor
  delay(2000); // De vertraging voor de sensor om een beter waarden te krijgen.
  float h = dht.readHumidity();
  // Read temperature in Celsius
  float t = dht.readTemperature();
  // Check of read niet lukt.
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  //temperatuur en druk sensor
// Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Send Pressure measurement command
  Wire.write(0x12);
  // Start conversion
  Wire.write(0x00);
  // Stop I2C Transmission
  Wire.endTransmission();
  delay(300);

  // Start I2C Transmission
  Wire.beginTransmission(Addr);
  // Select data register
  Wire.write(0x00);
  // Stop I2C Transmission
  Wire.endTransmission();

  // Request 4 bytes of data
  Wire.requestFrom(Addr, 4);

  // Read 4 bytes of data
  // pres msb, pres lsb, temp msb, temp lsb
  if (Wire.available() == 4)
  {
    data[0] = Wire.read();
    data[1] = Wire.read();
    data[2] = Wire.read();
    data[3] = Wire.read();
  }

  // Convert the data to 10-bits
  int pres = (data[0] * 256 + (data[1] & 0xC0)) / 64;
  int temp = (data[2] * 256 + (data[3] & 0xC0)) / 64;

  // Calculate pressure compensation
  float presComp = a1 + (b1 + c12 * temp) * pres + b2 * temp;

  // Convert the data
  float pressure = (65.0 / 1023.0) * presComp + 50.0;
  float cTemp = (temp - 498) / (-5.35) + 25.0;
  float fTemp = cTemp * 1.8 + 32.0;


int waarde1 = pressure;
int waarde2 = h;
int waarde3 = t;
Serial.print(waarde1);
Serial.print(";");
Serial.print(waarde2);
Serial.print(";");
Serial.print(waarde3);
Serial.println(";");

delay(500);


}

it is a long code, with a lot of calculating. i really don’t know every line in there.
also i don’t know what you mean. i am a noobie in this sort of things.
can u describe how i can see how many times it is sending ?

i like your kindess and help by the way. i appriciate it a lot. !