Stereo FM Radio Dashboard

#include <Arduino.h>
#include <SPI.h>
#include <Wire.h>
#include <WiFi.h>
#include <WiFiManager.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>
#include <time.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <U8g2_for_Adafruit_GFX.h>

#define TFT_CS 10
#define TFT_DC 4
#define TFT_RST 5
#define TFT_MOSI 11
#define TFT_SCK 12
#define FM_SDA 8
#define FM_SCL 9
#define FM_RST 6
#define ENC_CLK 15
#define ENC_DT 16
#define ENC_SW 17
#define WEATHER_BUTTON 18

const uint8_t SI4703_ADDR = 0x10;
Adafruit_ILI9341 tft(TFT_CS, TFT_DC, TFT_RST);
U8G2_FOR_ADAFRUIT_GFX u8g2;
uint16_t fmReg[16];
const int presets[] = {885, 945, 1017, 1042, 1065};
const uint8_t PRESET_COUNT = sizeof(presets) / sizeof(presets[0]);
int frequency10 = 1017, volumeLevel = 8, presetIndex = 2;
uint8_t encoderMode = 0; // 0 frekans, 1 ses, 2 hafiza
bool weatherScreen = false, needsFullDraw = true, weatherValid = false;
String stationName = "RDS bekleniyor";
char ps[9] = "        ";
String weatherNow = "Veri bekleniyor", weatherTomorrow = "Veri bekleniyor";
int tempNow = 0, humNow = 0, maxTomorrow = 0, minTomorrow = 0;
int dailyMax[3] = {0}, dailyMin[3] = {0}, dailyCode[3] = {0};
uint32_t lastClockDraw = 0, lastWeatherFetch = 0, lastInput = 0;
int lastClk = HIGH;

// Unifont's Polish Latin set also contains the Turkish Latin characters used here.
void fontSmall() { u8g2.setFont(u8g2_font_unifont_t_polish); }
void fontLarge() { u8g2.setFont(u8g2_font_unifont_t_polish); }
void text(int x, int y, const String &s, uint16_t color) { u8g2.setForegroundColor(color); u8g2.drawUTF8(x, y, s.c_str()); }

void siRead() {
  Wire.requestFrom((int)SI4703_ADDR, 32);
  for (int i = 0x0A; i <= 0x0F && Wire.available(); i++) fmReg[i] = (Wire.read() << 8) | Wire.read();
  for (int i = 0; i <= 0x09 && Wire.available(); i++) fmReg[i] = (Wire.read() << 8) | Wire.read();
}
void siWrite() {
  Wire.beginTransmission(SI4703_ADDR);
  for (int i = 0x02; i <= 0x07; i++) { Wire.write(fmReg[i] >> 8); Wire.write(fmReg[i] & 0xFF); }
  Wire.endTransmission();
}
void setVolume() { siRead(); fmReg[0x05] = (fmReg[0x05] & 0xFFF0) | constrain(volumeLevel, 0, 15); siWrite(); }
void tuneFM(int f) {
  frequency10 = constrain(f, 875, 1080);
  siRead();
  fmReg[0x03] = (fmReg[0x03] & 0xFE00) | (frequency10 - 875) | 0x8000;
  siWrite();
  uint32_t started = millis();
  do { delay(12); siRead(); } while (!(fmReg[0x0A] & 0x4000) && millis() - started < 700);
  siRead(); fmReg[0x03] &= ~0x8000; siWrite();
  stationName = "RDS aranıyor";
  memset(ps, ' ', 8); ps[8] = 0;
}
void initRadio() {
  pinMode(FM_SDA, OUTPUT); digitalWrite(FM_SDA, LOW);
  pinMode(FM_RST, OUTPUT); digitalWrite(FM_RST, LOW); delay(2); digitalWrite(FM_RST, HIGH); delay(5);
  Wire.begin(FM_SDA, FM_SCL); Wire.setClock(100000);
  siRead(); fmReg[0x07] = 0x8100; siWrite(); delay(550);
  siRead();
  fmReg[0x02] = 0x4001;                 // normal calisma
  fmReg[0x04] |= 0x1800;                // RDS ve Avrupa 50 us de-emphasis
  fmReg[0x05] = (fmReg[0x05] & 0xFF00) | 0x0010 | volumeLevel; // 100 kHz aralik
  siWrite(); delay(120);
  tuneFM(frequency10);
}
void readRDS() {
  siRead();
  if (!(fmReg[0x0A] & 0x8000)) return;
  uint16_t blockB = fmReg[0x0D], blockC = fmReg[0x0E], blockD = fmReg[0x0F];
  uint8_t group = (blockB >> 12) & 0x0F, versionB = (blockB >> 11) & 1;
  if (group == 0) {
    uint8_t at = (blockB & 3) * 2;
    ps[at] = char(blockD >> 8); ps[at + 1] = char(blockD & 0xFF);
    String candidate = String(ps); candidate.trim(); if (candidate.length()) stationName = candidate;
  } else if (group == 2) {
    String rt;
    if (versionB) { rt += char(blockD >> 8); rt += char(blockD & 0xFF); }
    else { rt += char(blockC >> 8); rt += char(blockC & 0xFF); rt += char(blockD >> 8); rt += char(blockD & 0xFF); }
    rt.trim(); if (rt.length() > 1) stationName = rt;
  }
}

String weatherLabel(int code) {
  if (code == 0) return "Açık";
  if (code <= 2) return "Az bulutlu";
  if (code == 3) return "Bulutlu";
  if (code <= 48) return "Sisli";
  if (code <= 57) return "Çiseleme";
  if (code <= 67) return "Yağmurlu";
  if (code <= 77) return "Karlı";
  if (code <= 82) return "Sağanak";
  return "Fırtınalı";
}
void getWeather() {
  if (WiFi.status() != WL_CONNECTED) { weatherNow = "Wi-Fi bağlı değil"; weatherTomorrow = "Hava verisi alınamadı"; weatherValid = false; return; }
  HTTPClient http;
  const char *url = "https://api.open-meteo.com/v1/forecast?latitude=41.0082&longitude=28.9784&current=temperature_2m,relative_humidity_2m,weather_code&daily=weather_code,temperature_2m_max,temperature_2m_min&timezone=Europe%2FIstanbul&forecast_days=3";
  http.begin(url); int code = http.GET();
  if (code == HTTP_CODE_OK) {
    JsonDocument doc; DeserializationError err = deserializeJson(doc, http.getStream());
    if (!err) {
      tempNow = lround(doc["current"]["temperature_2m"].as<float>());
      humNow = doc["current"]["relative_humidity_2m"].as<float>();
      weatherNow = weatherLabel(doc["current"]["weather_code"].as<int>());
      for (int i = 0; i < 3; i++) { dailyCode[i] = doc["daily"]["weather_code"][i]; dailyMax[i] = lround(doc["daily"]["temperature_2m_max"][i].as<float>()); dailyMin[i] = lround(doc["daily"]["temperature_2m_min"][i].as<float>()); }
      weatherTomorrow = weatherLabel(dailyCode[1]); maxTomorrow = dailyMax[1]; minTomorrow = dailyMin[1]; weatherValid = true;
    }
  }
  http.end(); lastWeatherFetch = millis(); needsFullDraw = true;
}
void drawWeatherGraphic(int x, int y, int code) {
  uint16_t sun = ILI9341_YELLOW, cloud = ILI9341_LIGHTGREY, rain = ILI9341_CYAN;
  if (code <= 2) { tft.fillCircle(x + 26, y + 25, 17, sun); for (int a = 0; a < 8; a++) { float r = a * PI / 4; tft.drawLine(x + 26 + cos(r) * 23, y + 25 + sin(r) * 23, x + 26 + cos(r) * 30, y + 25 + sin(r) * 30, sun); } }
  if (code >= 1) { tft.fillCircle(x + 25, y + 37, 15, cloud); tft.fillCircle(x + 42, y + 35, 19, cloud); tft.fillRect(x + 13, y + 37, 48, 16, cloud); }
  if (code >= 51 && code <= 82) for (int i = 0; i < 4; i++) tft.drawLine(x + 16 + i * 12, y + 59, x + 11 + i * 12, y + 70, rain);
  if (code >= 95) { tft.drawLine(x + 38, y + 49, x + 27, y + 68, ILI9341_YELLOW); tft.drawLine(x + 27, y + 68, x + 36, y + 68, ILI9341_YELLOW); }
}
void drawHeader(const String &title) {
  tft.fillScreen(ILI9341_NAVY); tft.fillRect(0, 0, 320, 34, ILI9341_DARKCYAN); fontLarge(); text(9, 24, title, ILI9341_WHITE);
}
void drawClock() {
  struct tm tm; if (!getLocalTime(&tm, 5)) return;
  char b[32]; strftime(b, sizeof(b), "%d.%m.%Y  %H:%M", &tm);
  tft.fillRect(126, 7, 188, 23, ILI9341_DARKCYAN); fontSmall(); text(128, 24, String(b), ILI9341_WHITE);
}
void drawRadio() {
  drawHeader("STEREO FM");
  tft.drawRoundRect(8, 45, 304, 91, 8, ILI9341_CYAN);
  fontLarge(); text(23, 77, "Frekans", ILI9341_LIGHTGREY);
  tft.setTextColor(ILI9341_YELLOW); tft.setTextSize(4); tft.setCursor(43, 125); tft.printf("%d.%d", frequency10 / 10, frequency10 % 10);
  tft.setTextSize(1); fontSmall(); text(205, 123, "MHz", ILI9341_YELLOW);
  tft.fillRoundRect(8, 146, 304, 41, 7, ILI9341_BLACK); fontSmall(); text(16, 172, "RDS: " + stationName, ILI9341_GREEN);
  tft.drawRoundRect(8, 199, 304, 31, 6, ILI9341_DARKGREY);
  String mode = encoderMode == 0 ? "Frekans" : (encoderMode == 1 ? "Ses" : "Kayıtlı");
  text(17, 221, "Encoder: " + mode + "   Ses: " + String(volumeLevel) + "/15", ILI9341_WHITE);
  drawClock();
}
void drawWeather() {
  drawHeader("İSTANBUL HAVA DURUMU");
  fontSmall(); text(10, 58, "Bugün", ILI9341_WHITE); drawWeatherGraphic(15, 65, weatherValid ? dailyCode[0] : 3);
  text(96, 88, weatherNow, ILI9341_WHITE); text(96, 112, String(tempNow) + "°C   Nem: %" + String(humNow), ILI9341_YELLOW);
  tft.drawFastHLine(8, 141, 304, ILI9341_DARKGREY);
  text(10, 165, "Yarın", ILI9341_WHITE); drawWeatherGraphic(15, 170, weatherValid ? dailyCode[1] : 3);
  text(96, 191, weatherTomorrow, ILI9341_WHITE); text(96, 216, "En düşük " + String(minTomorrow) + "°C   En yüksek " + String(maxTomorrow) + "°C", ILI9341_YELLOW);
  for (int i = 0; i < 3; i++) { int x = 215 + i * 34; int y = 229 - (dailyMax[i] + 10) * 2; tft.fillCircle(x, constrain(y, 150, 225), 3, ILI9341_RED); if (i) tft.drawLine(x - 34, constrain(229 - (dailyMax[i - 1] + 10) * 2, 150, 225), x, constrain(y, 150, 225), ILI9341_RED); }
  drawClock();
}
void drawScreen() { if (weatherScreen) drawWeather(); else drawRadio(); needsFullDraw = false; }

bool pressed(int pin) {
  static uint32_t lastPress[2] = {0, 0}; int slot = (pin == ENC_SW) ? 0 : 1;
  if (digitalRead(pin) == LOW && millis() - lastPress[slot] > 250) { lastPress[slot] = millis(); return true; }
  return false;
}
void handleInput() {
  int c = digitalRead(ENC_CLK);
  if (lastClk == HIGH && c == LOW && millis() - lastInput > 3) {
    int d = (digitalRead(ENC_DT) == HIGH) ? 1 : -1;
    if (encoderMode == 0) tuneFM(frequency10 + d); else if (encoderMode == 1) { volumeLevel = constrain(volumeLevel + d, 0, 15); setVolume(); } else { presetIndex = (presetIndex + d + PRESET_COUNT) % PRESET_COUNT; tuneFM(presets[presetIndex]); }
    lastInput = millis(); needsFullDraw = true;
  }
  lastClk = c;
  if (pressed(ENC_SW)) { encoderMode = (encoderMode + 1) % 3; needsFullDraw = true; }
  if (pressed(WEATHER_BUTTON)) { weatherScreen = !weatherScreen; needsFullDraw = true; if (weatherScreen && millis() - lastWeatherFetch > 60000) getWeather(); }
}
void setup() {
  pinMode(ENC_CLK, INPUT_PULLUP); pinMode(ENC_DT, INPUT_PULLUP); pinMode(ENC_SW, INPUT_PULLUP); pinMode(WEATHER_BUTTON, INPUT_PULLUP);
  SPI.begin(TFT_SCK, -1, TFT_MOSI, TFT_CS); tft.begin(); tft.setRotation(1); u8g2.begin(tft); tft.fillScreen(ILI9341_NAVY);
  fontSmall(); text(24, 110, "Stereo radyo başlatılıyor...", ILI9341_WHITE);
  WiFiManager wm; wm.setConfigPortalTimeout(180); wm.autoConnect("StereoRadyo-Ayar");
  configTime(3 * 3600, 0, "pool.ntp.org", "time.google.com");
  initRadio(); getWeather(); needsFullDraw = true;
}
void loop() {
  handleInput(); readRDS();
  if (millis() - lastWeatherFetch > 900000) getWeather();
  if (needsFullDraw) drawScreen();
  if (millis() - lastClockDraw > 1000) { drawClock(); lastClockDraw = millis(); }
  delay(5);
}