#include <WiFi.h>
#include <HTTPClient.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd (0x27, 16,2);

const char ssid[] = "Wokwi-GUEST";
const char password [] = "";
#define TRIGGER_PIN 23
#define ECHO_PIN 22 
const int NTC_sensor = 35;
const int PIR_sensor = 14;
float temperature;
int motion;

String server = "https://api.thingspeak.com/update?api_key=2K0DV1LPPMVLL0WW&field1=0";

void setup() {
  Serial.begin(9600);
  WiFi.begin(ssid, password);
  pinMode(PIR_sensor, INPUT);
  pinMode(TRIGGER_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  lcd. init ();
  lcd. backlight ();
}

void loop() {
  digitalWrite(TRIGGER_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIGGER_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGGER_PIN, LOW);

  long duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.034 / 2;

  motion = digitalRead(PIR_sensor);

  Serial.print("Distance:");
  Serial.print(distance);
  Serial.print("\t Motion Detected:");
  Serial.println(motion);
  if (WiFi.status() == WL_CONNECTED){
    sendData (distance, motion);
  }
  String dist = String(distance);
  lcd.setCursor(0,0);
  lcd.print("Distance" + dist + "cm");
  lcd.setCursor(0,1);
  if (motion = 0){
    lcd.print("Motion detected");
  }
  else{
    lcd.print("No motion");
  }
  delay(500);
}

void sendData(float distance, int motion){
  HTTPClient http;

  String url = server + "&field1=" + distance + "&field2=" + motion;
  http.begin(url.c_str());
  int httpResponseCode = http.GET();

  http.end();
}