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examples/Talking_Clock/TalkingClock.ino

+#include "Arduino.h"
+#include "Audio.h"
+#include "SD.h"
+#include "SPI.h"
+#include "FS.h"
+#include "Ticker.h"
+
+// Digital I/O used
+#define SD_CS          5
+#define SPI_MOSI      23
+#define SPI_MISO      19
+#define SPI_SCK       18
+#define I2S_DOUT      25
+#define I2S_BCLK      27
+#define I2S_LRC       26
+
+Audio audio;
+Ticker ticker;
+struct tm timeinfo;
+time_t now;
+
+uint8_t hour    = 6;
+uint8_t minute  = 59;
+uint8_t sec     = 45;
+
+bool f_time     = false;
+int8_t timefile = -1;
+char chbuf[100];
+
+void tckr1s(){
+    sec++;
+    if(sec > 59)   {sec = 0;     minute++;}
+    if(minute > 59){minute = 0; hour++;}
+    if(hour > 24)  {hour = 0;}
+    if(minute == 59 && sec == 50) f_time = true;  // flag will be set 10s before full hour
+    Serial.printf("%02d:%02d:%02d\n", hour, minute, sec);
+}
+
+void setup() {
+    Serial.begin(115200);
+    SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI);
+    SD.begin(SD_CS);
+    audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
+    audio.setVolume(10); // 0...21
+    ticker.attach(1, tckr1s);
+}
+
+void loop(){
+    audio.loop();
+    if(f_time == true){
+        f_time = false;
+        timefile = 3;
+        uint8_t next_hour = hour + 1;
+        if(next_hour == 25) next_hour = 1;
+        sprintf(chbuf, "/voice_time/%03d.mp3", next_hour);
+        audio.connecttoFS(SD, chbuf);
+    }
+}
+
+void audio_eof_mp3(const char *info){  //end of file
+    //Serial.printf("file :%s\n", info);
+    if(timefile>0){
+        if(timefile==1){audio.connecttoFS(SD, "/voice_time/080.mp3");     timefile--;}  // stroke
+        if(timefile==2){audio.connecttoFS(SD, "/voice_time/200.mp3");     timefile--;}  // precisely
+        if(timefile==3){audio.connecttoFS(SD, "/voice_time/O'clock.mp3"); timefile--;}
+    }
+}
+