Reloj Para Una Esp32-32 N4 Yellowcard Cyd 3

#include <Arduino.h>
#include <WiFi.h>
#include <time.h>
#include <Arduino_GFX_Library.h>

// Colores RGB565 explícitos: también permiten compilar en el simulador del navegador.
constexpr uint16_t BLACK = 0x0000;
constexpr uint16_t WHITE = 0xFFFF;
constexpr uint16_t CYAN = 0x07FF;
constexpr uint16_t GREEN = 0x07E0;
constexpr uint16_t YELLOW = 0xFFE0;

// Red Wi-Fi configurada para este reloj.

// Forward declarations
void centerText(const String &text, int y, uint8_t size, uint16_t color);
void drawStaticScreen();
void drawConnectionStatus(bool connected);
void connectWifi();

const char *WIFI_SSID = "Diversion.con.banderas";
const char *WIFI_PASSWORD = "Trustn01";

// Hora de España peninsular: cambia automáticamente entre CET y CEST.
const char *TIMEZONE = "CET-1CEST,M3.5.0/2,M10.5.0/3";
const char *NTP_SERVER_1 = "pool.ntp.org";
const char *NTP_SERVER_2 = "time.google.com";

constexpr int TFT_SCLK = 14;
constexpr int TFT_MOSI = 13;
constexpr int TFT_MISO = 12;
constexpr int TFT_CS = 15;
constexpr int TFT_DC = 2;
constexpr int TFT_RST = -1;  // El reset del ILI9341 está unido a EN en esta CYD.
constexpr int TFT_BL = 21;

Arduino_DataBus *bus = new Arduino_ESP32SPI(TFT_DC, TFT_CS, TFT_SCLK, TFT_MOSI, TFT_MISO);
Arduino_GFX *display = new Arduino_ILI9341(bus, TFT_RST, 1, false);

String lastTimeText;
String lastDateText;
bool lastWifiConnected = false;
unsigned long lastWifiAttempt = 0;

void centerText(const String &text, int y, uint8_t size, uint16_t color) {
  display->setTextSize(size);
  display->setTextColor(color);
  int16_t x1, y1;
  uint16_t w, h;
  display->getTextBounds(text, 0, y, &x1, &y1, &w, &h);
  display->setCursor((display->width() - w) / 2, y);
  display->print(text);
}

void drawStaticScreen() {
  display->fillScreen(BLACK);
  display->fillRect(0, 0, display->width(), 30, 0x001F);
  centerText("RELOJ WIFI", 7, 2, WHITE);
  display->drawRoundRect(8, 42, display->width() - 16, 86, 8, CYAN);
  display->drawRoundRect(8, 143, display->width() - 16, 47, 8, 0x7BEF);
}

void drawConnectionStatus(bool connected) {
  display->fillRect(10, 200, display->width() - 20, 30, BLACK);
  if (connected) {
    centerText("Wi-Fi conectado", 207, 1, GREEN);
  } else {
    centerText("Conectando Wi-Fi...", 207, 1, YELLOW);
  }
}

void connectWifi() {
  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  lastWifiAttempt = millis();
}

void setup() {
  pinMode(TFT_BL, OUTPUT);
  digitalWrite(TFT_BL, HIGH);

  display->begin();
  display->setRotation(1); // Pantalla en horizontal, 320 x 240.
  drawStaticScreen();
  drawConnectionStatus(false);

  connectWifi();
  configTzTime(TIMEZONE, NTP_SERVER_1, NTP_SERVER_2);
}

void loop() {
  const bool wifiConnected = WiFi.status() == WL_CONNECTED;
  if (!wifiConnected && millis() - lastWifiAttempt > 15000UL) {
    WiFi.disconnect();
    connectWifi();
  }

  if (wifiConnected != lastWifiConnected) {
    drawConnectionStatus(wifiConnected);
    lastWifiConnected = wifiConnected;
  }

  tm now;
  if (!getLocalTime(&now, 10)) {
    delay(200);
    return;
  }

  char timeBuffer[12];
  char dateBuffer[32];
  strftime(timeBuffer, sizeof(timeBuffer), "%H:%M:%S", &now);
  strftime(dateBuffer, sizeof(dateBuffer), "%A, %d/%m/%Y", &now);
  String timeText(timeBuffer);
  String dateText(dateBuffer);

  // Solo se repintan estas zonas cuando cambia lo que se ve en pantalla.
  if (timeText != lastTimeText) {
    display->fillRect(10, 44, display->width() - 20, 82, BLACK);
    centerText(timeText, 64, 5, WHITE);
    lastTimeText = timeText;
  }
  if (dateText != lastDateText) {
    display->fillRect(10, 145, display->width() - 20, 43, BLACK);
    centerText(dateText, 160, 1, 0xFFE0);
    lastDateText = dateText;
  }

  delay(100);
}