void setup() {

  Serial.begin(9600);

}

void loop() {

  float baca = analogRead(A0);

  delay(10);

  float voltase = 5.0*baca/1023.0;

  float tds = voltase*2000.0 / 5.0;   //max ppm = 2000 -> Gunakan Modul EC Transmitter

  Serial.print("Nilai PPM: ");

  Serial.println(tds);

  delay(2000);

}

const int ulangan = 9; // 9x perulangan pembacaan

int data [ulangan], dataTerima[ulangan];

int baca;

float voltase;

void setup() {

  Serial.begin(9600);

}

void loop() {

  bacaSensor();

  delay(10);

  int dataTengah = nilaiTengah(data);

  voltase = 5.0*dataTengah/1023.0;

  float tds = voltase*2000.0 / 5.0;  //max ppm = 2000

  Serial.print("Nilai PPM: ");

  Serial.println(tds);

  delay(2000);

}

void bacaSensor() {

  for (int i = 0; i < ulangan ; i++) {

    baca = analogRead(A0);

    data[i] = baca;

    delay(50);

  }

}

int nilaiTengah(int x[]){

  for (int a = 0; a < ulangan; a++){

    dataTerima[a] = x[a];

  }

  for (int b = 0; b < 8; b++) {

    for(int c = 0; c < 8-b; c++) {

      if (dataTerima[c] > dataTerima[c+1]){

        int simpanBentar = dataTerima[c];

        dataTerima[c] = dataTerima[c+1];

        dataTerima[c+1] = simpanBentar;

      }

    }

  }

  return dataTerima[4]; //data ke-5 dari 9 data

}