#include <MD_Parola.h>
#include <MD_MAX72XX.h>
#include <WiFi.h>
#include <time.h>
#include <SPI.h>
// WiFi credentials
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";
// MAX7219 config
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define MAX_DEVICES 4
#define DATA_PIN 6
#define CLK_PIN 7
#define CS_PIN 5
MD_Parola display = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
// Text to be displayed (can be changed according to needs)
const char* runningText = "SELAMAT DATANG DI UNIVERSITAS RAHARJA";
unsigned long lastSwitch = 0;
int mode = 0; // 0: jam, 1: running text
const int switchInterval = 12000; // change the display every 12 seconds
void setup() {
Serial.begin(115200);
display.begin();
display.setIntensity(8);
display.displayClear();
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("\nWiFi Connected");
// Synchronizing NTP time to GMT+7
configTime(7 * 3600, 0, "pool.ntp.org", "time.nist.gov");
// Show the scroll while waiting for available time
display.displayScroll("Connecting time...", PA_LEFT, PA_SCROLL_LEFT, 50);
while (!time(nullptr)) {
delay(1000);
}
display.displayClear();
}
void loop() {
unsigned long nowMillis = millis();
// Change the mode every few seconds
if (nowMillis - lastSwitch > switchInterval) {
mode = 1 - mode; // toggle between 0 and 1
lastSwitch = nowMillis;
display.displayClear();
}
if (mode == 0) {
// Digital clock mode
static char timeStr[9]; // "HH:MM:SS"
time_t now = time(nullptr);
struct tm* tm_info = localtime(&now);
snprintf(timeStr, sizeof(timeStr), "%02d:%02d:%02d", tm_info->tm_hour, tm_info->tm_min, tm_info->tm_sec);
display.setTextAlignment(PA_CENTER);
display.print(timeStr);
delay(1000); // update time every second
} else {
// Scrolling text mode
if (display.displayAnimate()) {
display.displayScroll(runningText, PA_LEFT, PA_SCROLL_LEFT, 50);
}
}
}
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