#include<DHTesp.h>
#include<WiFi.h>
#include<ThingSpeak.h>

char ssid[] = "Wokwi-GUEST";
char pass[] = ""; 

WiFiClient client;
long myChannelNumber =  2768765;
const char * myWriteAPIKey = "QC97F89XMGKAJ1MS";
int statusCode;

int rled = 33,gled= 15;
int echo = 13, trig = 12;
int pir = 26; 
int buzz = 2;
int distance,buzzer;
int motion = 0;
float temp;

DHTesp jeeva;
TempAndHumidity data;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(echo, INPUT);
  pinMode(trig, OUTPUT);
  pinMode(rled, OUTPUT);
  pinMode(gled, OUTPUT); 
  pinMode(pir, INPUT);
  pinMode(buzz, OUTPUT);
  jeeva.setup(16, DHTesp::DHT22);

  WiFi.mode(WIFI_STA);

  ThingSpeak.begin(client);

}

int finding_distance(){
  
  digitalWrite(trig, HIGH);
  delay(100);
  digitalWrite(trig, LOW);
  float a=pulseIn(echo, HIGH);
  return(a*0.034/2);
}

void loop() {
  // put your main code here, to run repeatedly:
  data = jeeva.getTempAndHumidity();
  float temp = data.temperature;
  int distance=finding_distance();

  motion=digitalRead(pir);

  if(temp>=35 && temp<=36 || temp>=37 && temp<=39 && motion==1){
      digitalWrite(gled, LOW);
      digitalWrite(rled, HIGH);
      tone(buzz,50);
      Serial.println("MOTION DETECTED!!");
      Serial.print("MOTION STATUS: ");
      Serial.println(motion);
      Serial.print("DISTANCE: ");
      Serial.println(distance);
      Serial.print("TEMPERATURE: ");
      Serial.println(temp);
      Serial.println("BUZZER IS ON!");
      buzzer = 1;
      delay(2000);
      }
      else{
        digitalWrite(rled, LOW);
        digitalWrite(gled, HIGH);
        noTone(buzz);
        buzzer = 0;
        Serial.print("MOTION STATUS: ");
        Serial.println(motion);
        Serial.println("SAFE!");
        Serial.print("DISTANCE: ");
        Serial.println(distance);
        Serial.print("TEMPERATURE: ");
        Serial.println(temp);
        Serial.println("BUZZER IS OFF");
        delay(2000);
      }
    
  

  if(WiFi.status() != WL_CONNECTED)  
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    WiFi.begin(ssid, pass); 
    Serial.print(".");
    delay(5000);
    }
  Serial.println("\nConnected.");
  } 

  ThingSpeak.setField(1, distance);
  ThingSpeak.setField(2, temp);
  ThingSpeak.setField(3, motion);
  ThingSpeak.setField(4, buzzer);

  statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);

  if(statusCode == 200) {
    Serial.println("Channel update successful.");
    }
}