/*
  HC-SR04 Ultrasonic Sensor Example.

  Turn the LED on when an object is within 100cm range.

  Copyright (C) 2021, Uri Shaked
*/

/* How to use DHT-11 sensor with Arduino uno
   Temperature and humidity sensor
   Dev: Michalis Vasilakis // Date: 1/7/2015 // www.ardumotive.com */


//Libraries
//#include <ESP32_I2C_Slave.h>
#include <DHT.h>
#include <Wire.h>
#include <EasyTransferI2C.h>

//create object
//LiquidCrystal_I2C ET; 

struct RECEIVE_DATA_STRUCTURE{
  //put your variable definitions here for the data you want to receive
  //THIS MUST BE EXACTLY THE SAME ON THE OTHER ARDUINO
  int temperature;
  float humidity;
  float distance;
};

//give a name to the group of data
RECEIVE_DATA_STRUCTURE mydata;

//Constants
#define DHTPIN 25     // what pin we're connected to
#define DHTTYPE DHT11   // DHT 11  (AM2302)
#define I2C_SLAVE_ADDRESS 9 //define slave i2c address
// Initialize DHT sensor for normal 16mhz Arduino
DHT dht(DHTPIN, DHTTYPE);

//Variables
int led1=22;
int led2=23;
int chk;
float hum;  //Stores humidity value
float temp; //Stores temperature value 

#define ECHO_PIN 24
#define TRIG_PIN 2



void setup() {

  Serial.begin(115200);
  Wire.begin();
  //start the library, pass in the data details and the name of the serial port. Can be Serial, Serial1, Serial2, etc.
  //define handler function on receiving data
  Wire.onReceive();
  
  pinMode(led2, OUTPUT);

  
  dht.begin();
  /*pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);*/
}

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void loop() {

    //check and see if a data packet has come in. 
  if(receiveData()){
    //this is how you access the variables. [name of the group].[variable name]
    //since we have data, we will blink it out. 
    for(int i = mydata.temperature; i>0; i--){
      digitalWrite(13, HIGH);
      delay(100);
      digitalWrite(13, LOW);
      delay(100);
    }
  }
  float distance = readDistanceCM();

  bool isNearby = distance < 100;
  digitalWrite(led1, isNearby);

  Serial.print("Measured distance: ");
  Serial.println(readDistanceCM());

   //Read data and store it to variables hum and temp
  hum = dht.readHumidity();
  temp = dht.readTemperature();
  //Print temp and humidity values to serial monitor
  Serial.print("Humidity: ");
  Serial.print(hum);
  Serial.print(" %, Temp: ");
  Serial.print(temp);
  Serial.println(" Celsius");
  digitalWrite(led2, LOW);
  if (temp>2)
  {
      digitalWrite(led2, HIGH);
      Serial.print("");
      Serial.print(" HOT CLIMATE");
  }
    
  delay(2000);

}

void receiveData(int numBytes) {}