RTC表示

firmware/SensorLogger.cpp

@@ -12,11 +12,17 @@ namespace {
 constexpr char kNusServiceUuid[] = "6E400001-B5A3-F393-E0A9-E50E24DCCA9E";
 constexpr char kNusRxUuid[] = "6E400002-B5A3-F393-E0A9-E50E24DCCA9E";
 constexpr char kNusTxUuid[] = "6E400003-B5A3-F393-E0A9-E50E24DCCA9E";
+constexpr int64_t kInitialYear = 1700;
+constexpr int64_t kSecondsPerDay = 86400;
 
 Adafruit_AHTX0 aht20;
 BH1750 bh1750;
 bool aht20Ready = false;
 bool bh1750Ready = false;
+
+bool isLeapYear(int year) {
+  return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
+}
 }
 
 class SensorLoggerCallbacks : public BLECharacteristicCallbacks {
@@ -96,6 +102,47 @@ bool SensorLogger::hasReading() const {
   return logCount_ != 0;
 }
 
+size_t SensorLogger::logCount() const {
+  return logCount_;
+}
+
+bool SensorLogger::getCurrentTime(char* buffer, size_t bufferSize) const {
+  if (bufferSize == 0) {
+    return false;
+  }
+
+  int64_t timestamp = currentTimestamp();
+  if (timeSynchronized_) {
+    time_t unixTimestamp = static_cast<time_t>(timestamp);
+    struct tm date;
+    localtime_r(&unixTimestamp, &date);
+    strftime(buffer, bufferSize, "%Y/%m/%d %H:%M:%S", &date);
+    return true;
+  }
+
+  int year = static_cast<int>(kInitialYear);
+  int month = 1;
+  int day = 1;
+  int64_t days = timestamp / kSecondsPerDay;
+  int seconds = static_cast<int>(timestamp % kSecondsPerDay);
+  while (days >= (isLeapYear(year) ? 366 : 365)) {
+    days -= isLeapYear(year) ? 366 : 365;
+    ++year;
+  }
+  const int daysInMonth[] = {
+    31, isLeapYear(year) ? 29 : 28, 31, 30, 31, 30,
+    31, 31, 30, 31, 30, 31
+  };
+  while (days >= daysInMonth[month - 1]) {
+    days -= daysInMonth[month - 1];
+    ++month;
+  }
+  day += static_cast<int>(days);
+  snprintf(buffer, bufferSize, "%04d/%02d/%02d %02d:%02d:%02d",
+    year, month, day, seconds / 3600, (seconds / 60) % 60, seconds % 60);
+  return true;
+}
+
 void SensorLogger::readAndStore() {
   sensors_event_t humidityEvent;
   sensors_event_t temperatureEvent;
@@ -193,7 +240,7 @@ void SensorLogger::sendLog() {
     size_t logIndex = (logStart_ + index) % kMaxLogEntries;
     const SensorReading& reading = log_[logIndex];
     char line[128];
-    snprintf(line, sizeof(line), "%lu,%.2f,%.2f,%.2f,%u,%s\n",
+    snprintf(line, sizeof(line), "%lld,%.2f,%.2f,%.2f,%u,%s\n",
       reading.timestamp,
       reading.temperature,
       reading.humidity,
@@ -224,7 +271,7 @@ void SensorLogger::clearLog() {
   logCount_ = 0;
 }
 
-unsigned long SensorLogger::currentTimestamp() const {
-  unsigned long elapsedSeconds = millis() / 1000UL;
+int64_t SensorLogger::currentTimestamp() const {
+  int64_t elapsedSeconds = millis() / 1000UL;
   return timeSynchronized_ ? epochOffset_ + elapsedSeconds : elapsedSeconds;
 }

firmware/SensorLogger.h

@@ -6,7 +6,7 @@ class BLECharacteristic;
 class BLEServer;
 
 struct SensorReading {
-  unsigned long timestamp;
+  int64_t timestamp;
   float temperature;
   float humidity;
   float illuminance;
@@ -21,6 +21,8 @@ public:
   bool update();
   const SensorReading& latest() const;
   bool hasReading() const;
+  size_t logCount() const;
+  bool getCurrentTime(char* buffer, size_t bufferSize) const;
 
 private:
   static constexpr unsigned long kMeasureIntervalMs = 3600000UL;
@@ -32,7 +34,7 @@ private:
   void sendNotification(const char* data);
   void sendLog();
   void clearLog();
-  unsigned long currentTimestamp() const;
+  int64_t currentTimestamp() const;
 
   BLEServer* server_ = nullptr;
   BLECharacteristic* txCharacteristic_ = nullptr;
@@ -42,7 +44,7 @@ private:
   size_t logCount_ = 0;
   uint8_t soilPin_ = 0;
   unsigned long lastMeasure_ = 0;
-  unsigned long epochOffset_ = 0;
+  int64_t epochOffset_ = 0;
   bool timeSynchronized_ = false;
   String bluetoothName_;
   String commandBuffer_;

firmware/firmware.ino

@@ -4,7 +4,7 @@
 #include "NeoPixelController.h"
 #include "SensorLogger.h"
 
-const char kBluetoothName[] = "BT_Speaker5.32";
+const char kBluetoothName[] = "BT_Speaker5.4";
 
 // I2C接続のOLED設定 (SSD1306 128x64)
 U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);
@@ -18,25 +18,37 @@ String currentTitle = "未接続";
 String currentArtist = "";
 int currentVolumePercent = 0; // 音量 (0 ~ 100%)
 bool bluetoothConnected = false;
+bool musicPlaying = false;
+unsigned long lastDisplayUpdate = 0;
 
 // 画面全体を再描画する関数
 void updateDisplay() {
   u8g2.clearBuffer();
 
-  if (!bluetoothConnected) {
+  if (!bluetoothConnected || !musicPlaying) {
     u8g2.setFont(u8g2_font_6x10_tf);
     const SensorReading& reading = sensorLogger.latest();
 
     char sensorLine[32];
+    char timeLine[24];
+    if (sensorLogger.getCurrentTime(timeLine, sizeof(timeLine))) {
+      u8g2.drawStr(0, 9, timeLine);
+    } else {
+      u8g2.drawStr(0, 9, "RTC: --/--/-- --:--:--");
+    }
+
+    snprintf(sensorLine, sizeof(sensorLine), "Log: %u", static_cast<unsigned int>(sensorLogger.logCount()));
+    u8g2.drawStr(0, 20, sensorLine);
+
     snprintf(sensorLine, sizeof(sensorLine), "T:%5.1fC H:%5.1f%%",
       reading.temperature, reading.humidity);
-    u8g2.drawStr(0, 12, sensorLine);
+    u8g2.drawStr(0, 32, sensorLine);
 
     snprintf(sensorLine, sizeof(sensorLine), "Light: %6.1f lx", reading.illuminance);
-    u8g2.drawStr(0, 30, sensorLine);
+    u8g2.drawStr(0, 44, sensorLine);
 
     snprintf(sensorLine, sizeof(sensorLine), "Soil: %4u", reading.soilMoisture);
-    u8g2.drawStr(0, 48, sensorLine);
+    u8g2.drawStr(0, 56, sensorLine);
     u8g2.sendBuffer();
     return;
   }
@@ -88,7 +100,7 @@ void avrc_metadata_callback(uint8_t id, const uint8_t *text) {
     updated = true;
   }
 
-  if (updated && bluetoothConnected) {
+  if (updated && bluetoothConnected && musicPlaying) {
     updateDisplay();
   }
 }
@@ -96,17 +108,22 @@ void avrc_metadata_callback(uint8_t id, const uint8_t *text) {
 // 音量変更時のコールバック関数
 void volume_changed_callback(int volume) {
   currentVolumePercent = map(volume, 0, 127, 0, 100);
-  if (bluetoothConnected) {
+  if (bluetoothConnected && musicPlaying) {
     updateDisplay();
   }
 }
 
 void audio_state_changed_callback(esp_a2d_audio_state_t state, void *) {
-  neoPixelController.setPlaying(state == ESP_A2D_AUDIO_STATE_STARTED);
+  musicPlaying = state == ESP_A2D_AUDIO_STATE_STARTED;
+  neoPixelController.setPlaying(musicPlaying);
+  updateDisplay();
 }
 
 void connection_state_changed_callback(esp_a2d_connection_state_t state, void *) {
   bluetoothConnected = state == ESP_A2D_CONNECTION_STATE_CONNECTED;
+  if (!bluetoothConnected) {
+    musicPlaying = false;
+  }
   updateDisplay();
 }
 
@@ -125,6 +142,7 @@ void setup() {
 
   sensorLogger.begin(32);
   updateDisplay();
+  lastDisplayUpdate = millis();
 
   // I2S ピン設定 (BCK: 27, WS: 25, DOUT: 26)
   i2s_pin_config_t my_pin_config = {
@@ -148,7 +166,11 @@ void setup() {
 
 void loop() {
   neoPixelController.update();
-  if (sensorLogger.update() && !bluetoothConnected) {
+  bool newReading = sensorLogger.update();
+  unsigned long now = millis();
+  if ((!bluetoothConnected || !musicPlaying)
+      && (newReading || now - lastDisplayUpdate >= 1000UL)) {
+    lastDisplayUpdate = now;
     updateDisplay();
   }
 }