DIY ESP Phone

#include <SPI.h>
#include <WiFi.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <XPT2046_Touchscreen.h>
#include <BindroidUI.h>

constexpr int TFT_CS = 4, TFT_DC = 27, TFT_RST = 26;
constexpr int TOUCH_CS = 25, TOUCH_IRQ = 33;
constexpr int SPI_SCK = 18, SPI_MISO = 19, SPI_MOSI = 23;
constexpr uint32_t TFT_SPI_HZ = 10000000;
constexpr uint16_t BG = ILI9341_BLACK, PANEL = 0x18E3, ACCENT = 0x05FF, DIM = 0xBDF7, GOOD = ILI9341_GREEN;

Adafruit_ILI9341 tft(TFT_CS, TFT_DC, TFT_RST);
XPT2046_Touchscreen touch(TOUCH_CS, TOUCH_IRQ);
BindroidUI ui(tft);
enum App { HOME, CLOCK_APP, STOPWATCH_APP, CALC_APP, WIFI_APP, GAME_APP, DEVICE_APP };
App app = HOME;
unsigned long lastTouch = 0, lastTick = 0, stopwatchStart = 0, frozenStopwatch = 0;
bool stopwatchRunning = false;
bool wifiScanning = false;
int calcValue = 0, gameScore = 0, wifiCount = -2;

void centered(const String &s, int y, int size, uint16_t color) { ui.printCentered(s, y, size, color); }
void bootScreen() {
  tft.fillScreen(ILI9341_NAVY); tft.fillRect(0, 0, tft.width(), 8, ACCENT);
  centered("BINDROID", 72, 4, ILI9341_WHITE); centered("Bindroid OS", 116, 2, ACCENT);
  centered("Display check: OK", 170, 1, GOOD); delay(700);
}
void home() {
  app = HOME; tft.fillScreen(BG); ui.drawHeader("Bindroid", false); centered("Bindroid OS  •  tap an app", 42, 1, DIM);
  ui.drawCard(8, 58, "Clock", "device time", ILI9341_YELLOW); ui.drawCard(168, 58, "Timer", "stopwatch", GOOD);
  ui.drawCard(8, 136, "Calc", "quick math", ILI9341_ORANGE); ui.drawCard(168, 136, "WiFi", "scan nearby", ILI9341_CYAN);
  tft.fillRoundRect(8, 216, 144, 19, 5, PANEL); tft.fillRoundRect(168, 216, 144, 19, 5, PANEL);
  tft.setTextSize(1); tft.setTextColor(DIM); tft.setCursor(37, 222); tft.print("GAME"); tft.setCursor(198, 222); tft.print("DEVICE");
}
void clockApp(bool full) {
  if (full) { app = CLOCK_APP; tft.fillScreen(BG); ui.drawHeader("Clock"); centered("Uptime clock", 55, 1, DIM); }
  tft.fillRect(12, 84, 296, 55, BG); unsigned long s = millis() / 1000UL; char stamp[16];
  snprintf(stamp, sizeof(stamp), "%02lu:%02lu:%02lu", s / 3600UL, (s / 60UL) % 60UL, s % 60UL);
  centered(stamp, 91, 4, ACCENT); centered("Wi-Fi can add calendar time later", 177, 1, DIM);
}
void stopwatchApp(bool full) {
  if (full) { app = STOPWATCH_APP; tft.fillScreen(BG); ui.drawHeader("Stopwatch"); }
  unsigned long elapsed = frozenStopwatch + (stopwatchRunning ? millis() - stopwatchStart : 0); tft.fillRect(0, 54, 320, 96, BG); char stamp[16];
  snprintf(stamp, sizeof(stamp), "%02lu:%02lu.%01lu", elapsed / 60000UL, (elapsed / 1000UL) % 60UL, (elapsed / 100UL) % 10UL);
  centered(stamp, 72, 4, ACCENT); tft.fillRoundRect(94, 165, 132, 38, 8, stopwatchRunning ? ILI9341_RED : GOOD);
  centered(stopwatchRunning ? "STOP" : "START", 177, 2, ILI9341_BLACK); centered("Tap the button", 215, 1, DIM);
}
void calculator() {
  app = CALC_APP; tft.fillScreen(BG); ui.drawHeader("Calculator"); tft.fillRoundRect(20, 52, 280, 52, 8, PANEL);
  tft.setTextSize(4); tft.setTextColor(ACCENT); tft.setCursor(35, 65); tft.print(calcValue);
  const char *keys[6] = {"+1", "+5", "+10", "-1", "CLEAR", "HOME"};
  for (int i = 0; i < 6; i++) { int x = 20 + (i % 3) * 96, y = 124 + (i / 3) * 54; tft.fillRoundRect(x, y, 84, 40, 7, PANEL); tft.setTextSize(1); tft.setTextColor(ILI9341_WHITE); tft.setCursor(x + 22, y + 15); tft.print(keys[i]); }
}
void drawWifiResults() {
  tft.fillRect(0, 52, 320, 168, BG);
  if (wifiScanning) {
    centered("Scanning nearby networks...", 96, 1, DIM);
    centered("Please wait", 120, 1, DIM);
  } else if (wifiCount <= 0) {
    centered("No network found", 108, 2, ILI9341_YELLOW);
  } else {
    centered(String(wifiCount) + " network(s) found", 52, 1, GOOD);
    int shown = min(wifiCount, 6);
    for (int i = 0; i < shown; i++) {
      tft.setTextSize(1); tft.setTextColor(ILI9341_WHITE); tft.setCursor(20, 76 + i * 22);
      tft.print(WiFi.SSID(i)); tft.setTextColor(DIM); tft.print("  ");
      tft.print(WiFi.RSSI(i)); tft.print(" dBm");
    }
  }
  centered("Scan only — no password is stored", 218, 1, DIM);
}
void wifiApp() {
  app = WIFI_APP; tft.fillScreen(BG); ui.drawHeader("Wi-Fi scan");
  WiFi.scanDelete(); wifiCount = -1; wifiScanning = true;
  WiFi.scanNetworks(true, false); drawWifiResults();
}
void game() {
  app = GAME_APP; tft.fillScreen(BG); ui.drawHeader("Tap Dash"); tft.fillRoundRect(55, 72, 210, 92, 12, ILI9341_MAGENTA);
  centered("TAP ME", 96, 3, ILI9341_WHITE); centered("Score: " + String(gameScore), 182, 2, ACCENT); centered("Each tap raises your score", 215, 1, DIM);
}
void device() {
  app = DEVICE_APP; tft.fillScreen(BG); ui.drawHeader("Bindroid device"); centered("Bindroid", 58, 3, ACCENT); centered("Bindroid OS", 94, 2, ILI9341_WHITE);
  centered("ESP32 DevKit V1", 137, 1, DIM); centered("ILI9341 display: active", 159, 1, GOOD); centered("XPT2046 touch: active", 181, 1, GOOD); centered("USB powered", 215, 1, DIM);
}
bool getTouch(int16_t &x, int16_t &y) {
  if (!touch.touched() || millis() - lastTouch < 160) return false; TS_Point p = touch.getPoint();
  x = constrain(map(p.x, 200, 3800, 0, tft.width() - 1), 0, tft.width() - 1); y = constrain(map(p.y, 200, 3800, 0, tft.height() - 1), 0, tft.height() - 1); lastTouch = millis(); return true;
}
void handleTouch(int16_t x, int16_t y) {
  if (app != HOME && x < 62 && y < 38) { home(); return; }
  if (app == HOME) { if (y >= 58 && y < 132 && x < 160) clockApp(true); else if (y >= 58 && y < 132) stopwatchApp(true); else if (y >= 136 && y < 212 && x < 160) calculator(); else if (y >= 136 && y < 212) wifiApp(); else if (y >= 212 && x < 160) game(); else if (y >= 212) device(); }
  else if (app == STOPWATCH_APP && y >= 155 && y <= 210) { if (stopwatchRunning) { frozenStopwatch += millis() - stopwatchStart; stopwatchRunning = false; } else { stopwatchStart = millis(); stopwatchRunning = true; } stopwatchApp(true); }
  else if (app == CALC_APP && y >= 124 && y <= 218) { int col = min(2, x / 96), row = (y - 124) / 54, key = row * 3 + col; if (key == 0) calcValue++; else if (key == 1) calcValue += 5; else if (key == 2) calcValue += 10; else if (key == 3) calcValue--; else if (key == 4) calcValue = 0; else { home(); return; } calculator(); }
  else if (app == GAME_APP && x >= 55 && x <= 265 && y >= 72 && y <= 164) { gameScore++; game(); }
}
void setup() {
  pinMode(TFT_CS, OUTPUT); pinMode(TOUCH_CS, OUTPUT); pinMode(TFT_RST, OUTPUT); digitalWrite(TFT_CS, HIGH); digitalWrite(TOUCH_CS, HIGH);
  digitalWrite(TFT_RST, LOW); delay(20); digitalWrite(TFT_RST, HIGH); delay(120); SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI, TFT_CS);
  tft.begin(TFT_SPI_HZ); tft.setRotation(1); bootScreen();
  touch.begin(); touch.setRotation(1);
  WiFi.mode(WIFI_STA); WiFi.disconnect(false, true);
  home();
}
void loop() {
  int16_t x, y; if (getTouch(x, y)) handleTouch(x, y);
  if (app == WIFI_APP && wifiScanning) {
    int result = WiFi.scanComplete();
    if (result >= 0) { wifiCount = result; wifiScanning = false; drawWifiResults(); }
  }
  if ((app == CLOCK_APP || app == STOPWATCH_APP) && millis() - lastTick >= 100) { lastTick = millis(); if (app == CLOCK_APP) clockApp(false); else stopwatchApp(false); }
  delay(10);
}