/*************************************************************

  This sketch shows the Traffic Light Signalling System sequence Model
  for double lane roads (i.e., 4 way road crossing, North-South Lane 
  & East-West Lane) using ESP32 Micro-controller

  App project setup:
    Switch widget (0...1) on Virtual Pin V0
    Slider widget (0...60000) on Virtual Pin V1
    Slider widget (0...60000) on Virtual Pin V2
 *************************************************************/

// Template ID, Device Name and Auth Token are provided by the Blynk.Cloud
// See the Device Info tab, or Template settings
#define BLYNK_TEMPLATE_ID           "TMPLajpZoRpU"
#define BLYNK_DEVICE_NAME           "Traffic Lights for 2 lane road"
#define BLYNK_AUTH_TOKEN            "BlXeim8sLj6VMHoFa6LUI-cdt31hvGHK"


// Comment this out to disable prints and save space
#define BLYNK_PRINT Serial

//Defining the ESP32 pin numbers for each LED connection
#define EWR 21 // Connect Red LED of East-West Lane to pin 21
#define NSR 14 // Connect Red LED of North-South Lane to pin 14
#define EWY 19 // Connect Yellow LED of East-West Lane to pin 19
#define NSY 12 // Connect Yellow LED of North-South Lane to pin 12
#define EWG 18 // Connect Green LED of East-West Lane to pin 18
#define NSG 13 // Connect Green LED of North-South Lane to pin 13

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

char auth[] = BLYNK_AUTH_TOKEN;

// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Declaring the switch and slider variables globally
int redgreentime;
int yellowtime;
int power;

// This function will be called every time Switch Widget
// in Blynk app writes values to the Virtual Pin V0
BLYNK_WRITE(V0)
{
  power = param.asInt(); // assigning incoming value from pin V0 to a variable

  // process received value
}

// This function will be called every time Slider Widget
// in Blynk app writes values to the Virtual Pin V1
BLYNK_WRITE(V1)
{
  redgreentime = param.asInt(); // assigning incoming value from pin V1 to a variable

  // process received value
}

// This function will be called every time Slider Widget
// in Blynk app writes values to the Virtual Pin V2
BLYNK_WRITE(V2)
{
  yellowtime = param.asInt(); // assigning incoming value from pin V2 to a variable

  // process received value
}

void setup()
{
  // Debug console
  Serial.begin(115200);
  pinMode(NSR, OUTPUT);
  pinMode(NSY, OUTPUT);
  pinMode(NSG, OUTPUT);
  pinMode(EWR, OUTPUT);
  pinMode(EWY, OUTPUT);
  pinMode(EWG, OUTPUT);

  Blynk.begin(auth, ssid, pass);
  // You can also specify server:
  //Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);
  //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8080);
}

void loop()
{
  Blynk.run();

  if(power==1) // LED states for Traffic Lights System Power ON condition
  {
    {
      digitalWrite(NSR, HIGH);
      digitalWrite(EWG, HIGH);
      delay(redgreentime);
    }
    { 
      digitalWrite(EWG, LOW);
      digitalWrite(EWY, HIGH);
      delay(yellowtime);
    }
    {   
      digitalWrite(EWY, LOW);
      digitalWrite(EWR, HIGH);
      delay(yellowtime);    
    }
    {  
      digitalWrite(NSR, LOW);    
      digitalWrite(NSG, HIGH);
      delay(redgreentime);
    }
    { 
      digitalWrite(NSG, LOW);
      digitalWrite(NSY, HIGH);
      delay(yellowtime);
    }
    {
      digitalWrite(NSY, LOW);
      digitalWrite(NSR, HIGH);
      delay(yellowtime);
    }   
    {  
      digitalWrite(EWR, LOW);
    } 
  }
  else // LED states for Traffic Lights System Power OFF condition
  {
    digitalWrite(NSR, LOW);
    digitalWrite(NSY, LOW);
    digitalWrite(NSG, LOW);
    digitalWrite(EWR, LOW);
    digitalWrite(EWY, LOW);
    digitalWrite(EWG, LOW);
  }
}