#include "DHT.h"
#include "Servo.h"

#include <LiquidCrystal_I2C.h>
int ledPin = 13;                // choose the pin for the LED
int inputPin = 5;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4
#define ECHO_PIN 4
#define TRIG_PIN 3


LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
Servo myservo;
String etat;

#define DHTPIN 2     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTYPE);


int bpm=0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println(F("DHT22 example!"));
  myservo.attach(8);
  myservo.write (0);
  dht.begin();
pinMode(8, OUTPUT);
 lcd.init();
  lcd.backlight();

  // Print something
  lcd.setCursor(7, 0);
  lcd.print("Welcome");
  lcd.setCursor(8, 1);
  lcd.print("M1IST");
  lcd.setCursor(2, 2);
  lcd.print("MULTIPARA MONITOR");
  lcd.setCursor(6, 3);
  lcd.print("SNL INNOV");
  delay(10000);
  lcd.clear();
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare sensor as input

}


void loop() {
  // put your main code here, to run repeatedly:
    float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  delay(2000);                  
  // display the above for two seconds
  }
humidity = dht.readHumidity();
temperature= dht.readTemperature();


  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature: "));
  Serial.print(temperature);
  Serial.println(F("°C "));
    
 



float distance = readDistanceCM();
Serial.print("Measured distance: ");
Serial.println(readDistanceCM());
bpm=analogRead(A0);
bpm=map(bpm,0,1023,6,22);
Serial.println(bpm);
if (bpm>17)
{
  etat="critique";
  myservo.write(90);
delay(100);
myservo.write(0);}
else{
  etat="normal";
}

 lcd.setCursor(0, 0);
  lcd.print("T:");
  lcd.setCursor(2, 0);
   lcd.print(temperature);
     lcd.setCursor(9, 0);
  lcd.print("D:");
  lcd.setCursor(11, 0);
  lcd.print(distance);
   lcd.setCursor(1, 1);
  lcd.print("Hum:");
  lcd.setCursor(7, 1);
  lcd.print(humidity);
  lcd.setCursor(1, 2);
  lcd.print("Tension:");
   lcd.setCursor(9, 2);
  lcd.print(bpm);
 lcd.setCursor(1, 3);
  lcd.print("etat:");
  lcd.setCursor(7, 3);
  lcd.print(etat);
val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(ledPin, HIGH);  // turn LED ON
    if (pirState == LOW) {
      // we have just turned on
      Serial.println("Motion detected!");
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW); // turn LED OFF
    if (pirState == HIGH) {
      // we have just turned of
      Serial.println("Motion ended!");
      // We only want to print on the output change, not state
      pirState = LOW;

    }}
 delay(1000);
}
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;
}