Hardware： M5Core2
Platform：Arduino

Q：
I have prepared a wave format file in the TF card and want to play it through the M5.Speaker class, but the audio cannot be played normally after configuring the Speaker

// code
void playSpeak(File* file) {
    auto config = M5.Speaker.config();
    config.pin_data_out = 2;
    config.pin_ws =  0;
    config.sample_rate = 16000;
    config.dma_buf_len = 1024;
    config.dma_buf_count = 2;
    // config.buzzer = true;
    config.i2s_port = I2S_NUM_0;
    M5.Speaker.config(config);
    M5.Speaker.begin();
    // M5.Speaker.tone(661, 1000);
    M5.Speaker.setAllChannelVolume(255);
    M5.Speaker.setVolume(64);
    M5.Speaker.setChannelVolume(0, 255);
    // bool status = M5.Speaker.tone(2000, 1000);
    uint8_t* dataBuf = (uint8_t*)malloc(file->size());
    file->read(dataBuf, file->size());
    Serial.printf("File Content: %d", file->size());
    bool status = M5.Speaker.playWav(dataBuf, file->size(), 1, 1, true);
    if (!status) {
        Serial.println("Failed to play");
    }
    free(dataBuf);
    file->close();
    M5.Speaker.end();
    i2s_driver_uninstall(I2S_NUM_0);
}

I have opened the source official test code in the Speaker class to print the WAV file information. The port print content is as follows:

Speech Start
File Content: 957804[ 14851][D][Speaker_Class.cpp:772] playWav(): [wav] RIFF           : RIFF
[ 14851][D][Speaker_Class.cpp:773] playWav(): [wav] chunk_size     : 957796
[ 14855][D][Speaker_Class.cpp:774] playWav(): [wav] WAVEfmt        : WAVEfmt 
[ 14862][D][Speaker_Class.cpp:775] playWav(): [wav] fmt_chunk_size : 16
[ 14868][D][Speaker_Class.cpp:776] playWav(): [wav] audiofmt       : 1
[ 14874][D][Speaker_Class.cpp:777] playWav(): [wav] channel        : 1
[ 14880][D][Speaker_Class.cpp:778] playWav(): [wav] sample_rate    : 16000
[ 14887][D][Speaker_Class.cpp:779] playWav(): [wav] byte_per_sec   : 32000
[ 14894][D][Speaker_Class.cpp:780] playWav(): [wav] block_size     : 2
[ 14900][D][Speaker_Class.cpp:781] playWav(): [wav] bit_per_sample : 16
Speech end

To solve this problem, I tried the following:

1. Test whether the hardware power amplifier is available. I tested the power amplifier through the official tone function to make sound normally.
2. Read and learn I2S-related knowledge, and understand the basic principles
3. Check the ESP32 I2S related instructions on the Internet

But I didn't solve my problem, hope anyone can help me to find out where is the problem. Thank you so much!

硬件型号：M5Core2
代码框架：Ardunio
问题：
我在TF卡中准备了一个wav格式的文件，想通过M5.Speaker类进行播放，但在配置Speaker后无法正常播放音频

// 我的代码
void playSpeak(File* file) {
    auto config = M5.Speaker.config();
    config.pin_data_out = 2;
    config.pin_ws =  0;
    config.sample_rate = 16000;
    config.dma_buf_len = 1024;
    config.dma_buf_count = 2;
    // config.buzzer = true;
    config.i2s_port = I2S_NUM_0;
    M5.Speaker.config(config);
    M5.Speaker.begin();
    // M5.Speaker.tone(661, 1000);
    M5.Speaker.setAllChannelVolume(255);
    M5.Speaker.setVolume(64);
    M5.Speaker.setChannelVolume(0, 255);
    // bool status = M5.Speaker.tone(2000, 1000);
    uint8_t* dataBuf = (uint8_t*)malloc(file->size());
    file->read(dataBuf, file->size());
    Serial.printf("File Content: %d", file->size());
    bool status = M5.Speaker.playWav(dataBuf, file->size(), 1, 1, true);
    if (!status) {
        Serial.println("Failed to play");
    }
    free(dataBuf);
    file->close();
    M5.Speaker.end();
    i2s_driver_uninstall(I2S_NUM_0);
}

我开放了Speaker类中源官方测试代码，用来打印wav文件信息，端口打印内容如下：

Speech Start
File Content: 957804[ 14851][D][Speaker_Class.cpp:772] playWav(): [wav] RIFF           : RIFF
[ 14851][D][Speaker_Class.cpp:773] playWav(): [wav] chunk_size     : 957796
[ 14855][D][Speaker_Class.cpp:774] playWav(): [wav] WAVEfmt        : WAVEfmt 
[ 14862][D][Speaker_Class.cpp:775] playWav(): [wav] fmt_chunk_size : 16
[ 14868][D][Speaker_Class.cpp:776] playWav(): [wav] audiofmt       : 1
[ 14874][D][Speaker_Class.cpp:777] playWav(): [wav] channel        : 1
[ 14880][D][Speaker_Class.cpp:778] playWav(): [wav] sample_rate    : 16000
[ 14887][D][Speaker_Class.cpp:779] playWav(): [wav] byte_per_sec   : 32000
[ 14894][D][Speaker_Class.cpp:780] playWav(): [wav] block_size     : 2
[ 14900][D][Speaker_Class.cpp:781] playWav(): [wav] bit_per_sample : 16
Speech end

为解决该问题，我做了如下尝试：

1. 测试硬件功放是否可用，我通过官方tone函数测试功放可以正常发出声音
2. 阅读学习I2S相关知识，了解了基础原理
3. 在网上查阅了ESP32 I2S相关使用指引

但我并没有解决我的问题，希望有人可以帮我看看是哪里的问题？非常感谢！

Q1:
I tried to create a ble-server, At the first time I set the service uuid a value, and the next time I set another uuid value, but there show also old value.
Q2:
I tried esp32 ble-server to blue-touch connect, but I found a question When I perform a Bluetooth connection, 3 services are created, but only one is available.

Example Code Link:https://github.com/espressif/arduino-esp32/blob/master/libraries/BLE/examples/BLE_server/BLE_server.ino