/* Combined parts of the code for both sensors and their target devices.
   Cooling(Fan) & lighting components (No MQTT yet).
*/
#include <Arduino.h>
#include <Wire.h>
#include "Adafruit_SHT31.h"
#include <Adafruit_Sensor.h>

bool enableHeater = false;
uint8_t loopCnt = 0;

Adafruit_SHT31 sht31 = Adafruit_SHT31();

int light = 15; //LDR readings taken and stored at pin A0.
int LEDPIN_1 = 27;  //LED pins used to react to light value differences.
int LEDPIN_2 = 14;
int FAN = 26; //Fan to simulate actuator heat pump, reacts to temperature input.
#define relay 4

void setup() {
  
  Serial.begin(9600); //does this start both sensors or just one?
  Serial.print(F("DHT11 Test"));
  pinMode(relay,OUTPUT); 
  if (! sht31.begin(0x44)) {   // Set to 0x45 for alternate i2c addr
    Serial.println("Couldn't find SHT31");
    while (1) delay(1);
  }

  Serial.print("Heater Enabled State: ");
  if (sht31.isHeaterEnabled())
    Serial.println("ENABLED");
  else
    Serial.println("DISABLED");

  pinMode(15, INPUT);
  pinMode(LEDPIN_1, OUTPUT); //Setting LEDs as outputs, since they are reacting to incoming light data
  pinMode(LEDPIN_2, OUTPUT);
}

void loop() {
  //DHT
  float temp = sht31.readTemperature();
  float h = sht31.readHumidity();

  if (! isnan(temp)) {  // check if 'is not a number'
    Serial.print("Temp *C = "); Serial.print(temp); Serial.print("\t\t");
  } else { 
    Serial.println("Failed to read temperature");

  }
  if(temp>=30)                   // Turn the fan on: We are a using a Normally closed connection here for the relay
  {
    // Normally Closed (NC) configuration, sends HIGH current signals to stop the current flow
    digitalWrite(relay, HIGH);
  Serial.println("Fan is ON");
  delay(5000); 
  }
  else                          // Turn the fan off
  {
   
  // Normally Closed (NC) configuration, sends LOW signals to stop the current flow
  digitalWrite(relay, LOW);
  Serial.println("Fan is OFF");
  delay(5000);
   }
  }



  //LDR
  int light = analogRead(15); //read light value from LDR in Ohms EVALUATE SHOUlD LIGHT NOT 15
  Serial.println(light);

  String lightString = String(light);
  Serial.println("The string equivalent to integer light is " + lightString + "°C");

  if (light < 1300) {
    Serial.println("It very bright, lots of natural light");
    Serial.println("Both LEDs are off");
    digitalWrite(LEDPIN_1, LOW);
    digitalWrite(LEDPIN_2, LOW);
  }
  else if (light > 1300 && light  < 2500) { //medium amount of light to show one LED at a time).
    Serial.println("moderate light quantity, quite cloudy");
    digitalWrite(LEDPIN_1, HIGH);
    digitalWrite(LEDPIN_2, LOW);
  }
  else { // both LEDs turn on when the surroundings are dark.
    Serial.println("Its very dark, extremely overcast or nighttime");
    digitalWrite(LEDPIN_1, HIGH);
    digitalWrite(LEDPIN_2, HIGH);
  }
  delay(750); //750ms delay between sensor readings.

  char* lightArr = &lightString[0]; //client.publish needs matching format of topic folder and light value
  //Serial.println(lightArr);
 // Serial.print (" this is the array");

}