PH Sensor E-201-C เซ็นเซอร์วัดความเป็นกรด/ด่าง PH0-14 SNP-00041

1const int analogPhPin = A5; //PH module pin P0 connected to analog pin A5
2long phTot, temTot;
3float phAvg, temAvg;
4int x;
5float C = 25.85; //Constant of straight line (Y = mx + C)
6float m = -6.80; // Slope of straight line (Y = mx + C)
7
8void setup() {
9
10  // sensors.begin(); //Start the DS18B20 Library
11  Serial.begin(9600);
12}
13void loop() {
14  phTot = 0;
15  temTot = 0;
16  phAvg = 0;
17  temAvg = 0;
18
19  //taking 10 sample and adding with 10 milli second delay
20  for (x = 0; x < 10 ; x++)
21  {
22    phTot += analogRead(analogPhPin);
23    temTot += analogRead(A4);
24    delay(10);
25  }
26  float temAvg = temTot / 10;
27  float phAvg = phTot / 10;
28  // float temVoltage = temAvg * (5000.0 / 1023.0); //convert sensor reading into milli volt
29  float phVoltage = phAvg * (5.0 / 1023.0); //convert sensor reading into milli volt
30
31
32  // float Etemp = temVoltage*0.1; //convert milli volt to temperature degree Celsius
33  float pHValue = phVoltage * m + C;
34
35  Serial.print("phVoltage = ");
36  Serial.print(phVoltage);
37  Serial.print(" ");
38  Serial.print("pH=");
39  Serial.println(pHValue);
40
41  delay(1000);
42}