// === CompartR ====

// Module #5 project

const int EW_RED = 14;  // The east-west red LED is wired to ESP32 board pin GPIO14
const int EW_YELLOW =12;  // The east-west yellow LED is wired to ESP32 board pin GPIO12
 
const int EW_GREEN = 13; // The east-west green LED is wired to ESP32 board pin GPIO13
const int NS_RED = 25;  // The north-south red LED is wired to Mega board pin GPIO25
const int NS_YELLOW = 26; // The north-south yellow LED is wired to Mega board pin GPIO 26
const int NS_GREEN = 27; // The north-south green LED is wired to Mega board pin GPIO 27

int Xw_value;

const int XW_MOM_SW = 19; //Cross Walk button

// the setup function runs once when you press reset or power the board 
void setup() {

pinMode(XW_MOM_SW, INPUT_PULLUP); // 0=pressed, 1 = unpressed button 
Serial.begin(115200);
pinMode(EW_RED, OUTPUT); // initialize digital pin 14 (east-west red LED) as an output.
pinMode(EW_YELLOW, OUTPUT); // initialize digital pin 12 (east-west yellow LED) as an output.
pinMode(EW_GREEN, OUTPUT);  // initialize digital pin 13 (east-west green LED) as an output.
 
pinMode(NS_RED, OUTPUT); // initialize digital pin 25(north-south red LED) as an output.
pinMode(NS_YELLOW, OUTPUT); // initialize digital pin 26 (north-south yellow LED) as an output.
pinMode(NS_GREEN, OUTPUT); // initialize digital pin 27 (north-south green LED) as an output.
}

// the loop function runs over and over again forever 
void loop() {

// read the cross walk button value: 
Xw_value=digitalRead(XW_MOM_SW);

if (Xw_value == LOW ){ // if crosswalk button (X-button) pressed

digitalWrite(EW_YELLOW , LOW);  // This should turn off the east-west yellow LED
digitalWrite(EW_GREEN, LOW);  // This should turn off the east-west green LED
digitalWrite(NS_YELLOW , LOW); // This should turn off the north-south yellow LED
digitalWrite(NS_GREEN, LOW);  // This should turn off the north-south green LED
 
for (int i=10; i>0; i--)

{ 

Serial.print(" Count = "); Serial.print(i);
Serial.println(" == Walk == ");

digitalWrite(EW_RED, HIGH);  // This should turn on the east-west red LED 
digitalWrite(NS_RED, HIGH);  // This should turn on the north-south red LED 
delay(500);  //wait 0.5 seconds
digitalWrite(EW_RED, LOW);  // This should turn off the east-west red LED 
digitalWrite(NS_RED, LOW);  // This should turn off the north-south red LED 
delay(500);  //wait 0.5 seconds
} // End of counter

} //

else // No Emergency ===

{

Serial.println(" == Do Not Walk == ");

// The next three lines of code turn on the east-west red LED 
digitalWrite(EW_RED, HIGH); // This should turn on the east-west red LED
digitalWrite(EW_YELLOW , LOW);  // This should turn off the east-west yellow LED
 
digitalWrite(EW_GREEN, LOW);  // This should turn off the east-west green LED

delay(1000); //Extended time for Red light#1 before the Green of the other side turns ON

// The next three lines of code turn on the north-south red LED 
digitalWrite(NS_RED, LOW);  // This should turn off the north-south red LED
digitalWrite(NS_YELLOW , LOW); // This should turn off the north-south yellow LED
digitalWrite(NS_GREEN, HIGH); // This should turn on the north-south green LED

delay(2000);  // wait for 1 second

// The next three lines of code turn on the east-west red LED
digitalWrite(EW_RED, HIGH); // This should turn on the east-west red LED
digitalWrite(EW_YELLOW , LOW);  // This should turn off the east-west yellow LED
digitalWrite(EW_GREEN, LOW);  // This should turn off the east-west green LED

// The next three lines of code turn on the north-south red LED
 
digitalWrite(NS_RED, LOW);  // This should turn off the north-south red LED
digitalWrite(NS_YELLOW , HIGH); // This should turn on the north-south yellow LED
digitalWrite(NS_GREEN, LOW);  // This should turn off the north-south green LED

delay(2000);  // wait for 1 second

// The next three lines of code turn on the north-south red LED

digitalWrite(NS_RED, HIGH); // This should turn on the north-south red LED

digitalWrite(NS_YELLOW , LOW); // This should turn off the north-south yellow LED
digitalWrite(NS_GREEN, LOW);  // This should turn off the north-south green LED

delay(1000); //Extended time for Red light#2 before the Green of the other side turns 

// The next three lines of code turn on the east-west yellow LED

digitalWrite(EW_RED, LOW);  // This should turn off the east-west red LED

digitalWrite(EW_YELLOW , LOW);  // This should turn off the east-west yellow LED
digitalWrite(EW_GREEN, HIGH); // This should turn on the east-west green LED
 
delay(2000);  // wait for 1 second

// The next three lines of code turn on the east-west yellow LED 
digitalWrite(EW_RED, LOW);  // This should turn off the east-west red LED
digitalWrite(EW_YELLOW , HIGH); // This should turn on the east-west yellow LED
digitalWrite(EW_GREEN, LOW);  // This should turn off the east-west green LED

// The next three lines of code turn on the north-south red LED

digitalWrite(NS_RED, HIGH); // This should turn on the north-south red LED

digitalWrite(NS_YELLOW , LOW); // This should turn off the north-south yellow LED
digitalWrite(NS_GREEN, LOW);  // This should turn off the north-south green LED
delay(2000);  // wait for 1 second

}// Emergency Button closing ============

}