/*
   PIR sensor 
*/

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

#define CHANNEL_ID 1907330
#define CHANNEL_API_KEY_WRITE "FK3C8M27RRTHQ11C"
#define CHANNEL_API_KEY_READ "LOARCNOLGZWOE4G4"

WiFiServer server(80);
WiFiClient client;

#define WIFI_TIMEOUT_MS 20000

int ledPin = 12;                // choose the pin for the LED
int inputPin = 14;               // choose the input pin (for PIR sensor)
int val = 0;                    // variable for reading the pin status

void connectWiFi() {
  Serial.print("Connecting...");
  WiFi.mode(WIFI_STA);
  WiFi.begin("Wokwi-GUEST", "", 6);

  unsigned long startAttemptTime = millis();

  while(WiFi.status() != WL_CONNECTED &&
    millis() - startAttemptTime < WIFI_TIMEOUT_MS) {
      Serial.print(".");
      delay(100);
    }

  if (WiFi.status() != WL_CONNECTED) {
    Serial.println("Fail");
  } else {
    Serial.print("Connected");
    Serial.println(WiFi.localIP());
  }

}

void setup() {
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare sensor as input

  Serial.begin(9600);
  connectWiFi();

  ThingSpeak.begin(client);

}

void loop() {
  //serverweb control led
  int on = ThingSpeak.readLongField(CHANNEL_ID,2, CHANNEL_API_KEY_READ); //read thingspeak
  if(on == HIGH) Serial.println("led on until click off");
  digitalWrite(12,on);

  //pir sensor 
  if(on == LOW){
    val = digitalRead(inputPin);  // read input value
    if (val == HIGH) {            // check if the input is HIGH  
      ThingSpeak.writeField(CHANNEL_ID, 1, 1, CHANNEL_API_KEY_WRITE);
      Serial.println("motion detection! led on for 15s");
      digitalWrite(ledPin, HIGH);  // turn LED ON
      delay(15000);
    } else  {
      Serial.println("led off");
      digitalWrite(ledPin, LOW); // turn LED OFF
    }
  }  
}