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

const char* ssid = "Wokwi-GUEST";
const char* password = "";
unsigned long myChannelNumber = 3020348;
const char* myWriteAPIKey = "Q9FDMG0DHN6IIP88";

WiFiClient client;
const int LDRpin = A0, IRpin = 17, LEDpin = 15, trigPin = 5, echoPin = 18, thresholdLDR = 300;

void setup() {
  Serial.begin(9600);
  pinMode(LDRpin, INPUT); pinMode(IRpin, INPUT);
  pinMode(LEDpin, OUTPUT); pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  WiFi.begin(ssid, password);
  ThingSpeak.begin(client);
}

float getDistanceCM() {
  digitalWrite(trigPin, LOW); delayMicroseconds(2);
  digitalWrite(trigPin, HIGH); delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  return pulseIn(echoPin, HIGH) * 0.034 / 2;
}

void loop() {
  int LDRval = analogRead(LDRpin), IRval = digitalRead(IRpin), longRangeFlag = 0;
  float distance = getDistanceCM();

  if (distance > 100) {
    Serial.println("Object detected beyond 100 cm");
    longRangeFlag = 1;
  }

  if (LDRval < thresholdLDR) {
    digitalWrite(LEDpin, IRval == LOW ? HIGH : LOW);
    Serial.println(IRval == LOW ? "Motion detected at night" : "No motion at night");
  } else {
    digitalWrite(LEDpin, LOW);
    Serial.println("Daytime - LED OFF");
  }

  ThingSpeak.setField(1, LDRval);
  ThingSpeak.setField(2, IRval);
  ThingSpeak.setField(3, digitalRead(LEDpin));
  ThingSpeak.setField(4, distance);
  ThingSpeak.setField(5, longRangeFlag);
  ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);

  Serial.print("Distance: "); Serial.print(distance); Serial.println(" cm");
  delay(10000);
}