#include <WiFi.h>
#include <SPI.h>

const char *ssid = "BSNL5G";
const char *password = "KIMAYA0207";

int dataInPin = 13;
int loadPin = 14;
int clockPin = 27;

void sendByte(int data) {
  for (int i = 0; i < 8; i++) {
    digitalWrite(clockPin, LOW);
    digitalWrite(dataInPin, (data & (1 << (7 - i))) > 0 ? HIGH : LOW);
    digitalWrite(clockPin, HIGH);
  }
}

void max7219_write(int address, int data) {
  digitalWrite(loadPin, LOW);
  sendByte(address);
  sendByte(data);
  digitalWrite(loadPin, HIGH);
  digitalWrite(loadPin, LOW);
}

void setup() {
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Initialize the Max 7219
  pinMode(dataInPin, OUTPUT);
  pinMode(loadPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  max7219_write(0x0c, 0x01); // shutdown mode
  max7219_write(0x0f, 0x00); // display test off
  max7219_write(0x0b, 0x07); // decode mode on for all digits
  max7219_write(0x0a, 0x01); // intensity to max
  max7219_write(0x0c, 0x01); // wake up from shutdown mode
}

void loop() {
  // Connect to a remote server and receive a message
  WiFiClient client;
  if (!client.connect("your_server_ip", 80)) {
    Serial.println("Connection failed");
    delay(1000);
    return;
  }
  client.println("GET /message");
  while (client.connected()) {
    String line = client.readStringUntil('\n');
    if (line == "\r") {
      break;
    }
  }

  // Display the message on the Max 7219 LED matrix
  for (int i = 1; i <= 8; i++) {
    int digit = link[i - 1] - '0';
    max7219_write(i, digit);
  }
  client.stop();
}