#include <WiFi.h>
#include <ThingSpeak.h>
#include "DHTesp.h"
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2080574;
const char * myWriteAPIKey = "S8Z5DI6T9AALBVJZ";
DHTesp dhtSensor;
TempAndHumidity data;
const int DHT_PIN = 25;
const int TRIG_PIN = 18;
const int ECHO_PIN = 19;
long duration, distance;
int inputPin1 = 32;
int inputPin2 = 33;
int inputPin3 = 35;
int inputPin4 = 5;
int pirState = LOW;
int statusCode;
int val = 0;
void setup() {
Serial.begin(115200);
WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);
dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
pinMode(TRIG_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
}
void loop() {
connectToCloud();
computeData();
writeData();
delay(1000);
}
void connectToCloud(){
if(WiFi.status() != WL_CONNECTED) {
Serial.print("Attempting to connect");
while(WiFi.status() != WL_CONNECTED) {
WiFi.begin(ssid, pass);
for(int i=0;i<5;i++) {
Serial.print(".");
delay(1000);
}
}
Serial.println("\nConnected.");
}
}
void computeData(){
  val = digitalRead(inputPin1);  // read input value
  if (val == HIGH) {            // check if the input is 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 {
     // 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;
    }
  }
  val = digitalRead(inputPin2);  // read input value
  if (val == HIGH) {            // check if the input is 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 {
     // 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;
    }
  }
  val = digitalRead(inputPin3);  // read input value
  if (val == HIGH) {            // check if the input is 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 {
     // 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;
    }
  }
  val = digitalRead(inputPin4);  // read input value
  if (val == HIGH) {            // check if the input is 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 {
    // 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;
    }
  }
distance = getDistanceInCentimeters();
data = dhtSensor.getTempAndHumidity();
Serial.println("-----------");
Serial.println("Humi: " + String(data.humidity));
Serial.println("Temp: " + String(data.temperature));
Serial.println("Dist: " + String(distance));
Serial.println("-----------");
}
void writeData(){
ThingSpeak.setField(1, data.humidity);
ThingSpeak.setField(2, data.temperature);
ThingSpeak.setField(3, distance);
ThingSpeak.setField(4, pirState);
ThingSpeak.setField(5, pirState);
ThingSpeak.setField(6, pirState);
ThingSpeak.setField(7, pirState);

statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
if(statusCode == 200) //successful writing code
Serial.println("Channel update successful.");
else
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
delay(15000); // data to be uploaded every 15secs
}
long getDistanceInCentimeters() {
digitalWrite(TRIG_PIN,LOW);
delayMicroseconds(2);
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
duration = pulseIn(ECHO_PIN, HIGH);
return (duration * 0.034 / 2);
}