#include <Wire.h>
#include <Arduino.h>

#define TDS_PIN 35
// Define PH_PIN
#define PH_PIN 32


void setup() {
  Wire.begin(23, 22);
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
}

void loop() {
   int16_t tdsValue = analogRead(TDS_PIN);
   float voltage = tdsValue * (5 / 4095.0);
   int mappedTdsValue = (voltage / 2.3) * 1000;

  // Read phValue from PH_PIN   
  int16_t phValue = analogRead(PH_PIN);
  // Covert the phValue to voltagePh
  float voltagePh = phValue * (5 / 4095.0);
  // find mappedPhValue
  int mappedPhValue = (voltagePh / 2.3) * 14;

   Serial.print("TDS: ");
   Serial.print(mappedTdsValue);
   Serial.print(" PH: ");
   Serial.println(mappedPhValue);
   
   delay(100); 
}