#include <SPI.h>
#include <Ethernet3.h>

// Configure MAC address and IP:
byte mac[] = {0x61, 0x2C, 0xF2, 0x09, 0x73, 0xBE};
IPAddress ip(10, 11, 1, 22);

// Define CS and RST pins:
#define W5500_CS_PIN 10
#define W5500_RST_PIN 9

const int pin_5V = 6;
const int pin_GND = 4;

EthernetClient client;

void setup() {
  // put your setup code here, to run once:
  pinMode(pin_5V, OUTPUT);
  pinMode(pin_GND, OUTPUT);

  digitalWrite(pin_5V, HIGH);
  digitalWrite(pin_GND, LOW);

  Serial.begin(9600);

  // Reset W5500:
  pinMode(W5500_RST_PIN, OUTPUT);
  digitalWrite(W5500_RST_PIN, HIGH);
  delay(250);
  digitalWrite(W5500_RST_PIN, LOW);
  delay(250);
  digitalWrite(W5500_RST_PIN, HIGH);
  delay(1000);

  // Initialize Ethernet:
  Ethernet.init(W5500_CS_PIN);
  Ethernet.begin(mac, ip);

  Serial.print("IP: ");
  Serial.println(Ethernet.localIP());
}

void loop() {
  // put your main code here, to run repeatedly:
  pinMode(pin_5V, INPUT);
  int state = digitalRead(pin_5V);
  pinMode(pin_5V, OUTPUT);

  if (state == HIGH) {
    Serial.println("1");
  } else {
    Serial.println("0");
  }
  delay (250)
}