const int analogPin = A0;  // Analog pin connected to the output of the pH sensor
const float voltageReference = 5.0;  // Arduino Uno voltage reference

void setup() {
  Serial.begin(9600);
}

void loop() {
  // Read analog value from the pH sensor
  int rawValue = analogRead(analogPin);
  
  // Convert raw analog value to voltage
  float voltage = (float)rawValue * voltageReference / 1023.0;
  
  // Convert voltage to pH level using calibration values
  float pH = mapVoltageToPH(voltage); // You need to implement this function

  // Print pH value to Serial Monitor
  Serial.print("pH: ");
  Serial.println(pH);
  
  delay(1000);  // Adjust delay as needed
}

float mapVoltageToPH(float voltage) {
  // Map voltage to pH level using your calibration values
  // You'll need to calibrate the sensor and provide your own mapping function
  // This function should return the corresponding pH level based on the voltage
  // Example:
  // float pH = someFunctionOfVoltage(voltage);
  // return pH;
}
/*In this code:

We define analogPin as the analog pin connected to the output of the pH sensor.
voltageReference is set to 5.0V, which is the reference voltage of the Arduino Uno.
In the setup() function, we initialize serial communication.
In the loop() function, we read the raw analog value from the pH sensor using analogRead().
We convert the raw analog value to voltage by scaling it based on the reference voltage (5.0V) and the ADC resolution (1023 steps).
You need to implement the mapVoltageToPH() function to map the voltage value to pH level using your calibration values. This function should return the corresponding pH level based on the voltage.
We print the pH value to the Serial Monitor.
Adjust the delay as needed to control the sampling frequency.
Please note that pH sensors require proper calibration to accurately measure pH levels. You'll need to calibrate your sensor using pH buffer solutions and adjust the mapping function accordingly. The mapping function will depend on the characteristics of your specific pH sensor and the calibration process you follow.*/