//move car left,right,backward,forward
//turn on the fan when the temperature exceeds a certain point
//use gps, probably print the longitude,latitude save them on SD card
//make a led which can follow the temperature

#include <DIYables_IRcontroller.h>
#include <DHT.h>
#include <TinyGPS++.h>
#include <SoftwareSerial.h>
#include <SD.h>

#define Relay_FAN 13
#define IR_Reciver 12
#define ENA 11
#define IN1 10
#define IN2 9
#define IN3 8
#define IN4 7
#define ENB 6
#define LED 5
#define SD_CS 4
#define GPS_RX 3
#define GPS_TX 2
#define DHT_Pin 1

DIYables_IRcontroller_17 IRcontroller(IR_Reciver,200);
DHT dht(DHT_Pin,DHT11);
TinyGPSPlus gps;
SoftwareSerial serialGPS(GPS_RX,GPS_TX);
File myFile;

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

  pinMode(Relay_FAN,OUTPUT);
  pinMode(ENA, OUTPUT);
  pinMode(IN1,OUTPUT);
  pinMode(IN2,OUTPUT);
  pinMode(IN3, OUTPUT);
  pinMode(IN4,OUTPUT);
  pinMode(ENB, OUTPUT);
  pinMode(LED, OUTPUT);

  digitalWrite(ENA, HIGH);
  digitalWrite(ENB, HIGH);

  dht.begin();
  serialGPS.begin(9600);
  SD.begin(SD_CS);
}

void loop() {
  Key17 key = IRcontroller.getKey();
  if(key != KEY::NONE){
    switch(key){
      case KEY17::KEY_UP:
        car_moveForward();
        break;
      case KEY17::KEY_DOWN:
        car_moveBackward();
        break;
      case KEY17::KEY_LEFT:
        car_turnLeft();
        break;
      case KEY17::KEY_RIGHT:
        car_turnRight();
        break;
      case KEY17::KEY_OK:
        car_stop();
        break;
    }
  }
  float temp_CS = dht.readTemperature();
  int led_analog_value = map(temp_CS > 0 ? temp_CS : 0,0,40,0,255);
  analogWrite(LED,led_analog_value);
  if(temp_CS > 25){
    digitalWrite(Relay_FAN, HIGH);
  }
  else{
    digitalWrite(Relay_FAN, LOW);
  }
  if(serialGPS.available()){
    if(gps.encode(serialGPS.read())){
      if(gps.location.isValid()){
        double lat = gps.location.lat();
        double lng = gps.location.lng();

        myFile = SD.open("GPS.txt",FILE_WRITE);
        myFile.print("Latitude: ");
        myFile.println(lat);
        myFile.print("Longitude: ");
        myFile.println(lng);
        myFile.close();
      }
    }
  }

}
void car_moveForward(){
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  digitalWrite(IN3, HIGH);
  digitalWrite(IN4, LOW);
}
void car_moveBackward(){
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, HIGH);
}
void car_turnLeft(){
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, HIGH);
}
void car_turnRight(){
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, HIGH);
  digitalWrite(IN4, LOW);
}
void car_stop(){
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, LOW);
}