#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

int inputPin = 7;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;    
#define ECHO_PIN 4
#define TRIG_PIN 3

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

#define DHTPIN 2  
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
Servo myservo;
int tension;
int buzzerPin= 8;
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(13, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  dht.begin();
  myservo.attach(5);
lcd.init();
  lcd.backlight();

  // Print something
  lcd.setCursor(1, 0);
  lcd.print("$$$marhaban$$$");
  lcd.setCursor(1, 1);
  lcd.print("$$$$projet MP$$$$$");
  lcd.setCursor(1, 2);
  lcd.print("$$$$$$$M1IST$$$$$$$");
  lcd.setCursor(1, 3);
  lcd.print("KWN MONITOR ");
  pinMode(inputPin, INPUT);
  delay(5000);
  lcd.clear();
}


void loop() {

// affichage de de la 

val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
   
    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 {
    
    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;
    }
  }
 tension=analogRead(A0);
 tension= map(tension,0,1023,6,22);
Serial.print("la tension de ce patient est: ");
Serial.println(tension);

  // activation poseringe
  if ((tension>17||tension<8)&&pirState == LOW)
  {
    myservo.write(90);
    delay(500);
     myservo.write(0);
     Serial.println("le patient non surveillé");
       }
  // affichage de distance
  float distance = readDistanceCM();
 if (distance>100)
  tone(buzzerPin, 1000, 500);
{
Serial.println("le patient est en risque");

lcd.clear();
lcd.setCursor(2, 0);
lcd.print("le patient");
lcd.setCursor(3, 1);
lcd.print("en risque");
delay(1000);
lcd.clear();
}

  Serial.print("Measured distance: ");
  Serial.println(readDistanceCM());
  // affichage de TH
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();


  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  // put your main code here, to run repeatedly: 
digitalWrite(13, HIGH);
delay(300);
digitalWrite(13, LOW);
delay(300);
digitalWrite(buzzerPin, HIGH);
delay(100);
digitalWrite(buzzerPin,LOW);
delay(100);
  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  Temperature: "));
  Serial.print(temperature);
  Serial.println(F("°C "));
  lcd.setCursor(1, 0);
  lcd.print("tension:");
   lcd.setCursor(10, 0);
  lcd.print(tension);
  lcd.setCursor(1, 1);
  lcd.print("Distance:");
   lcd.setCursor(10, 1);
  lcd.print(distance);
  lcd.setCursor(1, 2);
  lcd.print("Humidity:");
   lcd.setCursor(10, 2);
  lcd.print(humidity);
  lcd.setCursor(1, 3);
  lcd.print("Temperature:");
   lcd.setCursor(14, 3);
  lcd.print(temperature);
  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;
}