A2186.ino

/*
Example By ArduinoAll.com
ต่อขากับ Arduino Uno
Analog - A0
VCC - 5V
GND - GND
*/

int sensorPin = A0;
int sensorValue = 0;
float Vout = 0;
float P = 0;
void setup() {
  Serial.begin(9600);
}

void loop() {
  int i = 0;
  int sum = 0;
  int offset = 0;
  Serial.println("init...");
  for (i = 0; i < 10; i++)
  {
    sensorValue = analogRead(sensorPin) - 512;
    sum += sensorValue;
  }
  offset = sum / 10.0;
  Serial.println("Ok");
  while (1)
  {
    sensorValue = analogRead(sensorPin) - offset;
    Vout = (5 * sensorValue) / 1024.0;
    P = Vout - 2.5;
    Serial.print("Presure = " );
    Serial.print(P * 1000);
    Serial.println("Pa");
    delay(1000);
  }
}