Simplified version of code for ESP32

examples/Play_particular_MP3_ESP32/Play_particular_MP3_ESP32.ino

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+#include "Arduino.h"
+#include "DFRobotDFPlayerMini.h"
+
+// Define the serial port for communication with the DFPlayer Mini
+#define FPSerial Serial2
+
+// Create an instance of the DFPlayer Mini
+DFRobotDFPlayerMini myDFPlayer;
+
+// Function to print detailed messages from the DFPlayer Mini
+void printDetail(uint8_t type, int value) {
+  // ... (same implementation as before)
+}
+
+// Function to play a specific sound file with a given duration
+void playSound(int soundNumber, int duration) {
+  myDFPlayer.play(soundNumber);
+  delay(duration * 1000); // Convert duration from seconds to milliseconds
+}
+
+void setup() {
+  FPSerial.begin(9600);
+  Serial.begin(115200);
+
+  Serial.println(F("DFRobot DFPlayer Mini Demo"));
+  Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));
+
+  if (!myDFPlayer.begin(FPSerial)) {
+    Serial.println(F("Unable to begin:"));
+    Serial.println(F("1.Please recheck the connection!"));
+    Serial.println(F("2.Please insert the SD card!"));
+    while (true) {
+      delay(0); // Code to compatible with ESP8266 watch dog.
+    }
+  }
+  Serial.println(F("DFPlayer Mini online."));
+
+  myDFPlayer.volume(30); // Set volume value. From 0 to 30
+}
+
+void loop() {
+  // Example usage: Play sound file 1 for 5 seconds
+  playSound(1, 5);
+  /*
+  Important: MP3 File Organization
+    Create a Folder: On your TF card (microSD card), create a folder named mp3 in the root directory.
+    Organize MP3 Files: Place your MP3 files inside this mp3 folder. Name the files in the format 0001.mp3, 0002.mp3, 0003.mp3, and so on.
+  /mp3
+    /0001.mp3
+    /0002.mp3
+    /0003.mp3
+    ...
+  */
+  // Add more code here to play other sound files or implement other functionality
+}