#define BLYNK_TEMPLATE_ID "TMPL34OEu1JDR"
#define BLYNK_TEMPLATE_NAME "smart traffic diversion system"
#define BLYNK_AUTH_TOKEN "_wQ1VNR218QJbby4xbpZQUF-HImus-iU"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

char auth[] = "_wQ1VNR218QJbby4xbpZQUF-HImus-iU";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// LED pins
const int redLED = 16;
const int yellowLED = 17;
const int greenLED = 18;

BlynkTimer timer;

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);

  pinMode(redLED, OUTPUT);
  pinMode(yellowLED, OUTPUT);
  pinMode(greenLED, OUTPUT);

  // Set up a timer to check for LED state changes every second
  timer.setInterval(1000L, updateLEDs);
}

void loop() {
  Blynk.run();
  timer.run();
}

void updateLEDs() {
  // Simulate traffic light sequence
  digitalWrite(redLED, HIGH);
  delay(11000);
  digitalWrite(redLED, LOW);
  digitalWrite(yellowLED, HIGH);
  delay(3000);
  digitalWrite(yellowLED, LOW);
  digitalWrite(greenLED, HIGH);
  delay(7000);
  digitalWrite(greenLED, LOW);
  delay(1000);
}

BLYNK_WRITE(V1) {
  // This function gets called when the RED LED virtual pin changes state
  int redLEDState = param.asInt(); // Read the value sent from the app
  digitalWrite(redLED, redLEDState);
}

BLYNK_WRITE(V2) {
  // This function gets called when the YELLOW LED virtual pin changes state
  int yellowLEDState = param.asInt(); // Read the value sent from the app
  digitalWrite(yellowLED, yellowLEDState);
}

BLYNK_WRITE(V3) {
  // This function gets called when the GREEN LED virtual pin changes state
  int greenLEDState = param.asInt(); // Read the value sent from the app
  digitalWrite(greenLED, greenLEDState);
}