#include "dht.h"
#define dhtApin A0 // Analog Pin sensor is connected to
#define phApin A1 //This is the pin number connected to Po
#define levelApin A2
#define waterTempApin A3

dht DHT;

void setup() {
  Serial.begin(9600);
  delay(500);//Delay to let system boot
  Serial.println("DHT11 Humidity, temperature Sensor, and pHProde\n\n");
  delay(1000);//Wait before accessing Sensor
  pinMode(levelApin, INPUT);
}

void loop() {
  // PH prode loop
  int measure = analogRead(phApin);
  double voltage = 5 / 1024.0 * measure; //classic digital to voltage conversion
  // PH_step = (voltage@PH7 - voltage@PH4) / (PH7 - PH4)
  // PH_probe = PH7 - ((voltage@PH7 - voltage@probe) / PH_step)
  float Po = 7 + ((2.5 - voltage) / 0.18);

  // Temp/Hum Sensor
  DHT.read11(dhtApin);

  //Level Sensor
  int levelVoltage = analogRead(levelApin);

  //Water Temp
  int waterTempReading = analogRead(waterTempApin);

  // Temp/Hum print out
  Serial.print("Current humidity = ");
  Serial.print(DHT.humidity);
  Serial.print("%  ");
  Serial.print("temperature = ");
  Serial.print(DHT.temperature);
  Serial.println("C  ");

  // pH print out
  //Serial.print("pH Measure: \t");
  //Serial.print(measure);
  Serial.print("Voltage: ");
  Serial.print(voltage, 3);
  Serial.print("\tPH: ");
  Serial.print(Po, 3);
  Serial.println("");

  // Level sensor print out
  Serial.print("Level: ");
  Serial.print(levelVoltage/204);
  Serial.print("\n");

  //Water Temp Reading
  //Serial.print("Water Temp: ");
  //Serial.println(waterTempReading);
  //Serial.print("\n");
  Serial.print("\n");

  //Delay to access sensors
  delay(2000);
}