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

const char* ssid = "Wokwi-GUEST";
const char* password = "";

String apiKey = "E2SH3UY7OY3E4AAT";

void sendToThingSpeak(int state) {
  HTTPClient http;

  String url =
    "https://api.thingspeak.com/update?api_key=" +
    apiKey +
    "&field1=" +
    String(state);

  http.begin(url);
  int httpCode = http.GET();

  Serial.print("ThingSpeak Response: ");
  Serial.println(httpCode);

  http.end();
}

void setup() {
  Serial.begin(115200);

  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(15, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(2, OUTPUT);

  WiFi.begin(ssid, password);

  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWiFi Connected");
}

void loop() {

  // RED Signal
  digitalWrite(13, HIGH);
  digitalWrite(4, HIGH);
  Serial.println("RED ON");
  sendToThingSpeak(1);
  delay(2000);

  digitalWrite(13, LOW);
  digitalWrite(4, LOW);

  // YELLOW Signal
  digitalWrite(12, HIGH);
  digitalWrite(2, HIGH);
  Serial.println("YELLOW ON");
  sendToThingSpeak(2);
  delay(2000);

  digitalWrite(12, LOW);
  digitalWrite(2, LOW);

  // GREEN Signal
  digitalWrite(14, HIGH);
  digitalWrite(15, HIGH);
  Serial.println("GREEN ON");
  sendToThingSpeak(3);
  delay(2000);

  digitalWrite(14, LOW);
  digitalWrite(15, LOW);
}