├── README.md
└── esp32
    └── esp32_remote_mic2
        ├── I2S.cpp
        ├── I2S.h
        ├── Wav.cpp
        ├── Wav.h
        ├── data
            ├── index.html
            ├── jquery-3.4.1.min.js
            ├── live.js
            ├── player.js
            └── style.css
        └── esp32_remote_mic2.ino


/README.md:
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 1 | ESP32 as Remote MIC
 2 | 
 3 | <b>一.功能：</b><br/>
 4 | esp32 网页麦克风终端<br/>
 5 | 项目参考 https://github.com/paranerd/simplecam 项目进行的ESP32版本移植，原项目可以通过网页监听树莓派上传入的图像和声音. <br/>
 6 | esp32也能实现图像声音传输功能,目前只开发了声音功能.<br/>
 7 | 使用场景：单元楼大门声音对话，监听防盗, 作为智能音箱远程附件等<br/>
 8 | 
 9 | <b>二.硬件:</b> <br/>
10 |  ESP32+ INMP441(I2S麦克风模块)<br/>
11 |    推荐硬件：<br/>
12 |    A.普通ESP32+INMP441麦克风模块 成本低，需要几根杜邦线连接, 显得不整洁<br/>
13 | INMP441 <---> ESP32 , 接线定义见I2S.h <br/>
14 | SCK   <--->   IO14<br/>
15 | WS    <--->   IO27<br/>
16 | SD    <--->   IO2<br/>
17 | L/R   <--->   GND<br/>
18 | 
19 |    B.ESP-EYE 小巧，隐蔽性好,价格有些贵 <br/>
20 |    
21 |    C.TTGO T-Camera Plus ESP32 体积有些大，不隐蔽<br/>
22 |    
23 |    D.TTGO T-Watch 加一块带MIC扩展板 成本略高,隐蔽性好 <br/>
24 |    
25 | <b>三.使用方法：</b><br/>
26 |   1.打开网页浏览器, 输入访问地址 http://192.168.1.100  <br/>
27 |   2.网页打开后有一个切换声音是否播放按钮, 点击后浏览器开始接收并播放声音. <br/>
28 |   
29 |   注: <br/>
30 |   1.暂不支付多并发，同一时间只允许一个客户端<br/>
31 |   2.必须用支持html5的浏览器, IE不支持html,所以不可以用. pc上可以用chrome浏览器, 手机上内置的浏览器基本上都支持html5<BR/>
32 |   3.如果电脑播放声音为杂音, 电脑控制面板找到声音设置,将声音播放格式改成48000hz<BR/>
33 | 
34 | 
35 | 
36 | 


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/esp32/esp32_remote_mic2/I2S.cpp:
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 1 | void I2S_Init(i2s_mode_t MODE, int SAMPLE_RATE, i2s_bits_per_sample_t BPS) {
 2 |   i2s_config_t i2s_config = {
 3 |     .mode = (i2s_mode_t)(I2S_MODE_MASTER | MODE),
 4 |     .sample_rate = SAMPLE_RATE,
 5 |     .bits_per_sample = BPS,
 6 |     .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,//只获取单声道 左声道
 7 |     .communication_format = (i2s_comm_format_t)(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB),
 8 |     .intr_alloc_flags = 0,
 9 |     .dma_buf_count = 8,
10 |     .dma_buf_len = 64,
11 |     .use_apll = false
12 |   };
13 |   i2s_pin_config_t pin_config;
14 |   pin_config.bck_io_num = PIN_I2S_BCLK;
15 |   pin_config.ws_io_num = PIN_I2S_LRC;
16 |   if (MODE == I2S_MODE_RX) {
17 |     pin_config.data_out_num = I2S_PIN_NO_CHANGE;
18 |     pin_config.data_in_num = PIN_I2S_DIN;
19 |   }
20 |   else if (MODE == I2S_MODE_TX) {
21 |     pin_config.data_out_num = PIN_I2S_DOUT;
22 |     pin_config.data_in_num = I2S_PIN_NO_CHANGE;
23 |   }
24 |   i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL);
25 |   i2s_set_pin(I2S_NUM_0, &pin_config);
26 |   //最终设置: 16k, 16位，单声道
27 |    //1.0.3 rc1 以后的版本不要调用下句，否则I2S不可用
28 |   //i2s_set_clk(I2S_NUM_0, SAMPLE_RATE, BPS, I2S_CHANNEL_MONO);
29 | }
30 | 
31 | int I2S_Read(char* data, int numData) {
32 |   return i2s_read_bytes(I2S_NUM_0, (char *)data, numData, portMAX_DELAY);
33 | }
34 | 
35 | void I2S_Write(char* data, int numData) {
36 |     i2s_write_bytes(I2S_NUM_0, (const char *)data, numData, portMAX_DELAY);
37 | }
38 | 
39 | void I2S_uninstall()
40 | {
41 |   i2s_driver_uninstall(I2S_NUM_0);
42 |   }
43 | 


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/esp32/esp32_remote_mic2/I2S.h:
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 1 | #include <Arduino.h>
 2 | #include "freertos/FreeRTOS.h"
 3 | #include "freertos/task.h"
 4 | #include "driver/i2s.h"
 5 | #include "esp_system.h"
 6 | #define PIN_I2S_BCLK 14
 7 | #define PIN_I2S_LRC 27
 8 | #define PIN_I2S_DIN 2
 9 | #define PIN_I2S_DOUT -1
10 | 
11 | // This I2S specification : 
12 | //  -   LRC high is channel 2 (right).
13 | //  -   LRC signal transitions once each word.
14 | //  -   DATA is valid on the CLOCK rising edge.
15 | //  -   Data bits are MSB first.
16 | //  -   DATA bits are left-aligned with respect to LRC edge.
17 | //  -   DATA bits are right-shifted by one with respect to LRC edges.
18 | //        It's valid for ADMP441 (microphone) and MAX98357A (speaker). 
19 | //        It's not valid for SPH0645LM4H(microphone) and WM8960(microphon/speaker).
20 | //
21 | //  -   44100Hz
22 | //  -   stereo
23 | 
24 | /// @parameter MODE : I2S_MODE_RX or I2S_MODE_TX
25 | /// @parameter BPS : I2S_BITS_PER_SAMPLE_16BIT or I2S_BITS_PER_SAMPLE_32BIT
26 | void I2S_Init(i2s_mode_t MODE, int SAMPLE_RATE, i2s_bits_per_sample_t BPS);
27 | 
28 | /// I2S_Read() for I2S_MODE_RX
29 | /// @parameter data: pointer to buffer
30 | /// @parameter numData: buffer size
31 | /// @return Number of bytes read
32 | int I2S_Read(char* data, int numData);
33 | 
34 | /// I2S_Write() for I2S_MODE_TX
35 | /// @param data: pointer to buffer
36 | /// @param numData: buffer size
37 | void I2S_Write(char* data, int numData);
38 | 
39 | void I2S_uninstall();
40 | 


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/esp32/esp32_remote_mic2/Wav.cpp:
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 1 | #include "Wav.h"
 2 | 
 3 | void CreateWavHeader(byte* header, long waveDataSize){
 4 |   header[0] = 'R';
 5 |   header[1] = 'I';
 6 |   header[2] = 'F';
 7 |   header[3] = 'F';
 8 |   unsigned int fileSizeMinus8 = waveDataSize + 44 - 8;
 9 |   header[4] = (byte)(fileSizeMinus8 & 0xFF);
10 |   header[5] = (byte)((fileSizeMinus8 >> 8) & 0xFF);
11 |   header[6] = (byte)((fileSizeMinus8 >> 16) & 0xFF);
12 |   header[7] = (byte)((fileSizeMinus8 >> 24) & 0xFF);
13 |   header[8] = 'W';
14 |   header[9] = 'A';
15 |   header[10] = 'V';
16 |   header[11] = 'E';
17 |   header[12] = 'f';
18 |   header[13] = 'm';
19 |   header[14] = 't';
20 |   header[15] = ' ';
21 |   header[16] = 0x10;  // linear PCM
22 |   header[17] = 0x00;
23 |   header[18] = 0x00;
24 |   header[19] = 0x00;
25 |   header[20] = 0x01;  // linear PCM
26 |   header[21] = 0x00;
27 |   header[22] = 0x01;  // monoral
28 |   header[23] = 0x00;
29 |   header[24] = 0x80;  // sampling rate 16000
30 |   header[25] = 0x3E;
31 |   header[26] = 0x00;
32 |   header[27] = 0x00;
33 |   header[28] = 0x00;  // Byte/sec = 16000x2x1 = 32000
34 |   header[29] = 0x7D;
35 |   header[30] = 0x00;
36 |   header[31] = 0x00;
37 |   header[32] = 0x02;  // 16bit monoral
38 |   header[33] = 0x00;
39 |   header[34] = 0x10;  // 16bit
40 |   header[35] = 0x00;
41 |   header[36] = 'd';
42 |   header[37] = 'a';
43 |   header[38] = 't';
44 |   header[39] = 'a';
45 |   header[40] = (byte)(waveDataSize & 0xFF);
46 |   header[41] = (byte)((waveDataSize >> 8) & 0xFF);
47 |   header[42] = (byte)((waveDataSize >> 16) & 0xFF);
48 |   header[43] = (byte)((waveDataSize >> 24) & 0xFF);
49 | }
50 | 


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/esp32/esp32_remote_mic2/Wav.h:
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1 | #include <Arduino.h>
2 | 
3 | // 16bit, monoral, 16000Hz,  linear PCM
4 | void CreateWavHeader(byte* header, long waveDataSize);  // size of header is 44
5 | 


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/esp32/esp32_remote_mic2/data/index.html:
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 1 | <!DOCTYPE html>
 2 | <html>
 3 | <head>
 4 | 	<title>Audio Esp32</title>
 5 | </head>
 6 | 
 7 | <body>
 8 |   Audio Esp32  
 9 |   <div class="container">	
10 | 		<button id="listen" >listen off</button>
11 |  </div>
12 |  
13 | <link rel="stylesheet" href="style.css">
14 | 
15 | <script type="text/javascript" src="jquery-3.4.1.min.js"></script>	
16 | <script type="text/javascript" src="player.js"></script>
17 | <script type="text/javascript" src="live.js"></script>
18 | 
19 | </body>
20 | </html>
21 | 
22 | 


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/esp32/esp32_remote_mic2/data/jquery-3.4.1.min.js:
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3 | 


--------------------------------------------------------------------------------
/esp32/esp32_remote_mic2/data/live.js:
--------------------------------------------------------------------------------
 1 | 
 2 | var url = 'ws://' + document.domain + ':' + 1331;
 3 | //var url = 'ws://' + document.domain + ':' + 80;
 4 |   
 5 | let config = {
 6 | 	bufferSize: 1024*4
 7 | }
 8 |  
 9 |  
10 | $("#listen").on('click', function() {
11 | 	if (player.isPlaying()) {
12 |         console.log("trigger listen off");
13 | 		$(this).text("listen off");		
14 | 		player.stop();
15 | 	}
16 | 	else {
17 |         console.log("trigger listen on");
18 | 		$(this).text("listen on")
19 | 		player.play();
20 |         //延时，确保连接成功后再发送信息
21 | 		setTimeout(function(){ doSend("0"); },1000);
22 | 		//doSend("600"); 
23 | 	}
24 | });
25 | 
26 | // Call this to connect to the WebSocket server
27 | function wsConnect(url) {    
28 |     // Connect to WebSocket server
29 |     websocket = new WebSocket(url);
30 |     
31 |     // Assign callbacks
32 |     websocket.onopen = function(evt) { onOpen(evt) };
33 |     websocket.onclose = function(evt) { onClose(evt) };
34 |     websocket.onmessage = function(evt) { onMessage(evt) };
35 |     websocket.onerror = function(evt) { onError(evt) };
36 | 	
37 | 
38 |     player = new Player(config, websocket);
39 |     //player.play();
40 | }
41 |  
42 | // Called when a WebSocket connection is established with the server
43 | function onOpen(evt) { 
44 |     // Log connection state
45 |     console.log("Connected");    
46 | 
47 | }
48 |  
49 | // Called when the WebSocket connection is closed
50 | function onClose(evt) { 
51 |     // Log disconnection state
52 |     console.log("Disconnected");    
53 | 
54 |     // Try to reconnect after a few seconds
55 |     //setTimeout(function() { wsConnect(url) }, 2000);
56 | }
57 |  
58 | // Called when a message is received from the server
59 | function onMessage(evt) { 
60 |     // Print out our received message
61 |     //blob对象
62 |     //console.log(evt.data);
63 | 		
64 | 	player.write(evt.data);   
65 | }
66 |  
67 | // Called when a WebSocket error occurs
68 | function onError(evt) {
69 |     console.log("ERROR: " + evt.data);
70 | }
71 |  
72 | // Sends a message to the server (and prints it to the console)
73 | function doSend(message) {
74 |     //ESP32是单线程，同一函数一次只能同时服务一个
75 |     //一次只能同时服务一个
76 |     //执行前最好检查下当前连接状态
77 |     //否则容易出现如下错误
78 |     //Uncaught DOMException: Failed to execute 'send' on 'WebSocket': 
79 |     //Still in CONNECTING state.
80 |     console.log("Sending: " + message);
81 |     websocket.send(message);
82 | }
83 |  
84 | 
85 |  // This is called when the page finishes loading
86 | function init() {   
87 |     // Connect to WebSocket server
88 |     wsConnect(url);
89 | }
90 | 
91 | 
92 | 		
93 | 		
94 | // Call the init function as soon as the page loads
95 | window.addEventListener("load", init, false);
96 |  
97 | 


--------------------------------------------------------------------------------
/esp32/esp32_remote_mic2/data/player.js:
--------------------------------------------------------------------------------
  1 | class Player {
  2 | 	constructor(config, socket) {
  3 | 		let self = this;
  4 | 		this.config = config;
  5 | 		this.socket = socket;
  6 | 		this.audioCtx = null;
  7 | 		this.silence = new  Float32Array(this.config.bufferSize);
  8 | 		this.playing = false;
  9 | 
 10 |         
 11 | 		this.audioQueue = {
 12 | 			buffer: new Float32Array(0),
 13 | 
 14 | 			write: function(chunk) {
 15 | 				let currentLength = this.buffer.length;
 16 | 				let newBuffer = new Float32Array(currentLength + chunk.length);
 17 |                 //console.log("currentLength",currentLength,newBuffer.length,chunk.length)
 18 | 				newBuffer.set(this.buffer, 0);
 19 | 				newBuffer.set(chunk, currentLength);
 20 |                 //console.log("newBuffer",newBuffer.length)
 21 | 				this.buffer = newBuffer;
 22 | 			},
 23 | 
 24 | 			read: function(nSamples) {
 25 | 				let samplesToPlay = this.buffer.subarray(0, nSamples);
 26 | 				this.buffer = this.buffer.subarray(nSamples, this.buffer.length);
 27 | 				return samplesToPlay;
 28 | 			},
 29 | 
 30 | 			length: function() {
 31 | 				return this.buffer.length;
 32 | 			},
 33 | 
 34 | 			clear: function() {
 35 | 				this.buffer = new Float32Array(0)
 36 | 			}
 37 | 		}
 38 | 
 39 | 	}
 40 | 
 41 | 	play() {
 42 | 		this.playing = true;
 43 | 		this.audioCtx = new AudioContext();
 44 |         
 45 |         //48000频率 只读属性
 46 |         //16000频率的声音传入会导致 3倍加速
 47 |         console.log(this.audioCtx.sampleRate);
 48 |         //this.audioCtx.sampleRate= 16000;
 49 |         
 50 | 		this.scriptNode = this.audioCtx.createScriptProcessor(this.config.bufferSize, 1, 1);
 51 |         console.log("play") 
 52 | 		this.scriptNode.onaudioprocess = (e) => {
 53 |                // console.log("audioQueue") 
 54 |                // console.log(this.audioQueue.length())             
 55 | 			if (this.audioQueue.length()) {
 56 | 
 57 | 				e.outputBuffer.getChannelData(0).set(this.audioQueue.read(this.config.bufferSize));
 58 | 			}
 59 | 			else {
 60 | 				e.outputBuffer.getChannelData(0).set(this.silence);
 61 | 			}
 62 | 		}
 63 | 
 64 | 		this.scriptNode.connect(this.audioCtx.destination);
 65 | 	}
 66 | 
 67 |     //将传入的16000频率的声音数据转成48000频率的声音数据
 68 |     interleave(e){
 69 |       let t = e.length;
 70 |       let sampleRate = 16000.0 ;
 71 |       let outputSampleRate = 48000.0;
 72 |       let s = 0;
 73 |       let o = sampleRate / outputSampleRate;
 74 |       let u = Math.ceil(t * outputSampleRate / sampleRate);      
 75 |       let a = new Float32Array(u);
 76 |       let i=0;
 77 |       for (i = 0; i < u; i++) {
 78 |         a[i] = e[Math.floor(s)];
 79 |         s += o;
 80 |       }
 81 |       return a;
 82 |     }
 83 |     
 84 |     //MDN上说，audioporcess缓冲区的数据是，非交错的32位线性PCM，标称范围介于-1和之间+1，
 85 |     //即32位浮点缓冲区，每个样本介于-1.0和1.0之间。
 86 |     //http://www.i2geek.com/mobile/articleContent.php?id=19544
 87 |     //https://webaudio.github.io/web-audio-api/#APIOverview
 88 |     write(chunk) {
 89 | 		//将传入的blob转换成 Float32Array对象 
 90 |         var reader = new FileReader(); 
 91 |         var my_audioQueue= this.audioQueue;
 92 |         var my_int16ToFloat32= this.int16ToFloat32
 93 |         var my_interleave= this.interleave;
 94 |         reader.onload = function(e) {
 95 |            //console.log(reader.result); 
 96 |            let new_chunk=reader.result;          
 97 |   
 98 |            //A.如果输入是: 16000hz 16位声音数据            
 99 |            //let testDataInt = new Int8Array(new_chunk);
100 |            let testDataInt = new Int16Array(new_chunk); 
101 |            //16位对象转32位对象                
102 |            let array = my_int16ToFloat32(testDataInt,0,testDataInt.length);
103 |            //16000hz 转 48000hz
104 |            array= my_interleave(array);           
105 |            //console.log(array.length,array);  
106 |            console.log("get wav bytes:",array.length);
107 |            //B.如果输入是: 48000hz 16位声音数据
108 |            /*
109 |            let array = new Float32Array(new_chunk);
110 |            console.log(array.length,array);              
111 | 		   */           
112 | 		   my_audioQueue.write(array);       
113 |         }; 
114 |         reader.readAsArrayBuffer(chunk);        
115 | 	}
116 |     
117 |     
118 | 	
119 | 	stop() {
120 | 		this.audioQueue.clear();
121 | 		this.scriptNode.disconnect();
122 | 		this.scriptNode = null;
123 | 	}
124 | 
125 | 	isPlaying() {
126 | 		return !! this.scriptNode;
127 | 	}
128 | 
129 |     int16ToFloat32(inputArray, startIndex, length) {
130 | 		var output = new Float32Array(inputArray.length-startIndex);
131 | 		for (var i = startIndex; i < length; i++) {
132 | 			var int = inputArray[i];
133 | 			// If the high bit is on, then it is a negative number, and actually counts backwards.
134 | 			var float = (int >= 0x8000) ? -(0x10000 - int) / 0x8000 : int / 0x7FFF;
135 | 			output[i] = float;
136 | 		}
137 | 		return output;
138 | 	}
139 | }
140 | 


--------------------------------------------------------------------------------
/esp32/esp32_remote_mic2/data/style.css:
--------------------------------------------------------------------------------
1 | .video {
2 | 	margin-left: auto;
3 | 	margin-right: auto;
4 | 	height: 480px;
5 | 	width: 640px;
6 | 	display: block;
7 | }
8 | 


--------------------------------------------------------------------------------
/esp32/esp32_remote_mic2/esp32_remote_mic2.ino:
--------------------------------------------------------------------------------
  1 | #include <Arduino.h>
  2 | #include <WiFi.h>
  3 | #include "I2S.h"
  4 | #include "Wav.h"
  5 | #include <WebSocketsServer.h>
  6 | #include <SPIFFS.h>
  7 | #include <ESPAsyncWebServer.h>
  8 | 
  9 | //注意：
 10 | //  除了编译烧写本程序，还需要使用 ESP32 SKetch Data Upload 将data目录的一些网页文件等上传至 SPIFFS
 11 | 
 12 | //声音流: 16000hz, 16位 单声道 pcm数据 32KB/S 256kbps/s
 13 | //设置语句如下:
 14 | // I2S_Init(I2S_MODE_RX, 16000, I2S_BITS_PER_SAMPLE_16BIT);
 15 | 
 16 | const char *ssid = "CMCC-r3Ff";
 17 | const char *password =  "9999900000";
 18 | AsyncWebServer server(80);
 19 | WebSocketsServer webSocket = WebSocketsServer(1331);
 20 | const int numCommunicationData = 8000;
 21 | //数组：8000字节缓冲区
 22 | char communicationData[numCommunicationData];   //1char=8bits 1byte=8bits 1int=8*2 1long=8*4
 23 | char buff[100];
 24 | 
 25 | //这个psram版本就是提前分配了一个内存区,专用于存放声音数据,调用百度声音识别时不需要借助于SD卡做为交换.
 26 | //wav文件头的44个字节, 为base64 处理需要, 必须是6的倍数,  多加点数据
 27 | 
 28 | const int headerSize = 44;
 29 | byte  wav_head[headerSize];
 30 | 
 31 | uint8_t connect_no = -1; //当前连接号
 32 | bool sound_skip = false; //控制发送声音html5中断跳出
 33 | 
 34 | // Callback: receiving any WebSocket message
 35 | void onWebSocketEvent(uint8_t client_num,
 36 |                       WStype_t type,
 37 |                       uint8_t * payload,
 38 |                       size_t length) {
 39 |   String tmpstr ;
 40 |   int loop1;
 41 |   int sound_second = 0;
 42 | 
 43 |   int16_t val16 = 0;
 44 |   uint8_t val1, val2;
 45 |   int32_t tmpval = 0;
 46 | 
 47 |   //注意：esp32 对于wssocket 在同一函数中,不支持多并发
 48 |   //但同一函数在执行时，可以并发另一函数事件
 49 |   //所以如果在供给一个函数mic输出时， 其它用户是进入不了的！
 50 | 
 51 |   int32_t low_sound = 10;   //声音下限 低于此值的声音数据截掉
 52 |   int32_t high_sound = 5000; //声音上限 高于此值的声音数据截掉
 53 | 
 54 |   int add_sound = 40; //音量加倍系数
 55 | 
 56 |   File  wav_file ;
 57 | 
 58 |   switch (type) {
 59 |     case WStype_DISCONNECTED:
 60 |       Serial.printf("client:[%u] Disconnected!\n", client_num);
 61 |       Serial.printf("client:[%u] last connect_no=[%u] \n", client_num, connect_no);
 62 | 
 63 |       if (connect_no == client_num)
 64 |       {
 65 |         sound_skip = true;
 66 |         Serial.printf("client:[%u] trigger stop wav\n",client_num);
 67 |       }
 68 |       break;
 69 | 
 70 |     // New client has connected
 71 |     case WStype_CONNECTED:
 72 |       {
 73 |         IPAddress ip = webSocket.remoteIP(client_num);
 74 |         Serial.printf("client:[%u] Connection from %s\n", client_num,ip.toString().c_str());
 75 |         //Serial.println();
 76 |       }
 77 |       break;
 78 | 
 79 |     // Handle text messages from client
 80 |     case WStype_TEXT:
 81 | 
 82 |       /*
 83 |         Serial.printf("client:[%u] begin send test sound...\n",client_num);
 84 | 
 85 |         wav_file = SPIFFS.open("/cn_word.wav", FILE_READ);
 86 |         //改成文件直接读取，测试效果
 87 |         while (wav_file.available())
 88 |         {
 89 |         int readnum = wav_file.read((uint8_t *)communicationData, numCommunicationData);
 90 |         if (readnum > 0)
 91 |         {
 92 |           webSocket.sendBIN(client_num, (uint8_t *)communicationData, readnum);
 93 |         }
 94 |         else
 95 |           break;
 96 |         }
 97 |         wav_file.close();
 98 | 
 99 |          Serial.printf("client:[%u] end send test sound...\n",client_num);
100 |       */
101 | 
102 |       // Print out raw message
103 |       //Serial.printf("client:[%u] [%u] seconds: %s\n",client_num, length,  payload);
104 |       sprintf(buff, "%s", payload);
105 | 
106 |       for (int loop1 = 0; loop1 < length; loop1++)
107 |       {
108 |         char ch = payload[loop1];
109 |         tmpstr += ch;
110 |       }
111 |       //Serial.println("tmpstr=" + tmpstr);
112 |       sound_second = tmpstr.toInt();
113 |       //Serial.println("");
114 |       Serial.printf("client:[%u] request [%u] seconds\n", client_num,sound_second);
115 | 
116 |       Serial.printf("client:[%u] begin send wav sound ...\n", client_num );
117 | 
118 |       if (sound_second > 0)
119 |       {
120 |         //先输出wav文件头
121 |         //html5不需要，注意会产生嘀嘀噪音
122 |         //如果用于html5播放端， wav head数据不需要传输
123 |         //8000*4是一秒的wav数据量
124 |         CreateWavHeader(wav_head, 8000 * sound_second * 4);
125 |         webSocket.sendBIN(client_num, (uint8_t *)wav_head, headerSize);
126 |         //send_wavhead = true;
127 |       }
128 | 
129 |       //如果声音秒数是负数，表示中断上次连接
130 |       if (sound_second < 0)
131 |       {
132 |         Serial.printf("client:[%u] sound_second<0\n",client_num);
133 |         sound_skip = true;
134 |         break;
135 |       }
136 | 
137 |       //1. 0 表示不限时间输出
138 |       if (sound_second == 0)
139 |       {
140 | 
141 |         connect_no = client_num;
142 |         sound_skip = false;
143 |         //esp32的线程功能局限，一次只能服务1个网页
144 |         //如果无限循环输出声音，则当html5客户端关闭后，新的连接不能进来，导致esp32必须重启
145 |         //建议一次 30秒或60秒，即使 html5客户端关闭,时间到后也会自动关闭本次连接！
146 |         //Uncaught DOMException: Failed to execute 'send' on 'WebSocket': Still in CONNECTING state.
147 | 
148 | 
149 |         //1/4秒 8000字节
150 |         //每秒要循环4次读取音频数据
151 |         //for 指定几秒就传输几秒数据
152 |         //for ( loop1 = 0; loop1 < sound_second * 4; loop1++)
153 |         //无限循环输出，直到当前html5连接主动关闭(比如网页关闭)
154 |         while (true)
155 |         {
156 |           //  yield();
157 |           if (sound_skip == true)
158 |           {
159 |             Serial.printf("client:[%u] skip send wav sound ...\n",client_num);
160 |             break;
161 |           }
162 |           I2S_Read(communicationData, numCommunicationData);
163 | 
164 |           //for  提升音量
165 |           for (int loop1 = 0; loop1 < numCommunicationData / 2 ; loop1++)
166 |           {
167 |             val1 = communicationData[loop1 * 2];
168 |             val2 = communicationData[loop1 * 2 + 1] ;
169 |             val16 = val1 + val2 *  256;
170 | 
171 |             //add_sound 配置成40最合适
172 |             //乘以40 ：音量提升20db
173 |             tmpval = val16 * add_sound;
174 |             if (abs(tmpval) > 32767 )
175 |             {
176 |               if (val16 > 0)
177 |                 tmpval = 32767;
178 |               else
179 |                 tmpval = -32767;
180 |             }
181 | 
182 |             //对声音设置上下限
183 |             //防止噪音
184 |             //if (abs(tmpval) > high_sound)
185 |             // tmpval = high_sound;
186 | 
187 |             //Serial.println(String(val1) + " " + String(val2) + " " + String(val16) + " " + String(tmpval));
188 |             communicationData[loop1 * 2] =  (byte)(tmpval & 0xFF);
189 |             communicationData[loop1 * 2 + 1] = (byte)((tmpval >> 8) & 0xFF);
190 |           }
191 | 
192 |           /*
193 |             //for  排除噪音
194 |             for (int loop1 = 0; loop1 < numCommunicationData / 2 ; loop1++)
195 |             {
196 |             val1 = communicationData[loop1 * 2];
197 |             val2 = communicationData[loop1 * 2 + 1] ;
198 |             val16 = val1 + val2 *  256;
199 | 
200 |             //将高于指定音量，低于指定音量的数据排除
201 | 
202 |             tmpval = val16 * 1;
203 |             //高于上限的噪音去除
204 |             if (abs(tmpval) > high_sound )
205 |             {
206 |               if (val16 > 0)
207 |                 tmpval = high_sound;
208 |               else
209 |                 tmpval = -high_sound;
210 |             }
211 | 
212 |             //低于下限的噪音，去除
213 |             if (abs(tmpval) < low_sound )
214 |             {
215 |               tmpval = 0;
216 |             }
217 | 
218 |             //Serial.println(String(val1) + " " + String(val2) + " " + String(val16) + " " + String(tmpval));
219 |             communicationData[loop1 * 2] =  (byte)(tmpval & 0xFF);
220 |             communicationData[loop1 * 2 + 1] = (byte)((tmpval >> 8) & 0xFF);
221 |             }
222 |           */
223 | 
224 |           //传输声音文件主体
225 |           webSocket.sendBIN(client_num, (uint8_t *)communicationData, numCommunicationData);
226 |           //webSocket.broadcastBIN((uint8_t *)communicationData, numCommunicationData, false);
227 |         }
228 |       }
229 |       //2.有限时间输出
230 |       else
231 |       {
232 |         connect_no = client_num;
233 |         sound_skip = false;
234 |         //esp32的线程功能局限，一次只能服务1个网页
235 |         //如果无限循环输出声音，则当html5客户端关闭后，新的连接不能进来，导致esp32必须重启
236 |         //建议一次 30秒或60秒，即使 html5客户端关闭,时间到后也会自动关闭本次连接！
237 |         //Uncaught DOMException: Failed to execute 'send' on 'WebSocket': Still in CONNECTING state.
238 | 
239 |         //1/4秒 8000字节
240 |         //每秒要循环4次读取音频数据
241 |         //for 指定几秒就传输几秒数据
242 |         for ( loop1 = 0; loop1 < sound_second * 4; loop1++)
243 |           //无限循环输出，直到当前html5连接主动关闭(比如网页关闭)
244 |           //while (true)
245 |         {
246 |           //  yield();
247 |           if (sound_skip == true)
248 |           {
249 |             Serial.printf("client:[%u] skip wav sound ...\n", client_num);
250 |             break;
251 |           }
252 |           I2S_Read(communicationData, numCommunicationData);
253 | 
254 |           //for  提升音量
255 |           for (int loop1 = 0; loop1 < numCommunicationData / 2 ; loop1++)
256 |           {
257 |             val1 = communicationData[loop1 * 2];
258 |             val2 = communicationData[loop1 * 2 + 1] ;
259 |             val16 = val1 + val2 *  256;
260 | 
261 |             //add_sound 配置成40最合适
262 |             //乘以40 ：音量提升20db
263 |             tmpval = val16 * add_sound;
264 |             if (abs(tmpval) > 32767 )
265 |             {
266 |               if (val16 > 0)
267 |                 tmpval = 32767;
268 |               else
269 |                 tmpval = -32767;
270 |             }
271 | 
272 |             //对声音设置上下限
273 |             //防止噪音
274 |             //if (abs(tmpval) > high_sound)
275 |             // tmpval = high_sound;
276 | 
277 |             //Serial.println(String(val1) + " " + String(val2) + " " + String(val16) + " " + String(tmpval));
278 |             communicationData[loop1 * 2] =  (byte)(tmpval & 0xFF);
279 |             communicationData[loop1 * 2 + 1] = (byte)((tmpval >> 8) & 0xFF);
280 |           }
281 | 
282 |           /*
283 |             //for  排除噪音
284 |             for (int loop1 = 0; loop1 < numCommunicationData / 2 ; loop1++)
285 |             {
286 |             val1 = communicationData[loop1 * 2];
287 |             val2 = communicationData[loop1 * 2 + 1] ;
288 |             val16 = val1 + val2 *  256;
289 | 
290 |             //将高于指定音量，低于指定音量的数据排除
291 | 
292 |             tmpval = val16 * 1;
293 |             //高于上限的噪音去除
294 |             if (abs(tmpval) > high_sound )
295 |             {
296 |               if (val16 > 0)
297 |                 tmpval = high_sound;
298 |               else
299 |                 tmpval = -high_sound;
300 |             }
301 | 
302 |             //低于下限的噪音，去除
303 |             if (abs(tmpval) < low_sound )
304 |             {
305 |               tmpval = 0;
306 |             }
307 | 
308 |             //Serial.println(String(val1) + " " + String(val2) + " " + String(val16) + " " + String(tmpval));
309 |             communicationData[loop1 * 2] =  (byte)(tmpval & 0xFF);
310 |             communicationData[loop1 * 2 + 1] = (byte)((tmpval >> 8) & 0xFF);
311 |             }
312 |           */
313 | 
314 |           //传输声音文件主体
315 |           webSocket.sendBIN(client_num, (uint8_t *)communicationData, numCommunicationData);
316 |           //webSocket.broadcastBIN((uint8_t *)communicationData, numCommunicationData, false);
317 |         }
318 |       }
319 | 
320 |       Serial.printf("client:[%u] end send wav sound ...\n", client_num );
321 | 
322 |       break;
323 | 
324 |     // For everything else: do nothing
325 |     case WStype_BIN:
326 |     case WStype_ERROR:
327 |     case WStype_FRAGMENT_TEXT_START:
328 |     case WStype_FRAGMENT_BIN_START:
329 |     case WStype_FRAGMENT:
330 |     case WStype_FRAGMENT_FIN:
331 |     default:
332 |       break;
333 |   }
334 | }
335 | 
336 | 
337 | // Callback: send homepage
338 | void onIndexRequest(AsyncWebServerRequest * request) {
339 |   IPAddress remote_ip = request->client()->remoteIP();
340 |   Serial.println("  [" + remote_ip.toString() +
341 |                  "] HTTP GET request of " + request->url());
342 |   request->send(SPIFFS, "/index.html", "text/html");
343 | }
344 | 
345 | // Callback: send style sheet
346 | void onCSSRequest(AsyncWebServerRequest * request) {
347 |   IPAddress remote_ip = request->client()->remoteIP();
348 |   //Serial.println("[" + remote_ip.toString() +
349 |   //              "] HTTP GET request of " + request->url());
350 |   request->send(SPIFFS, "/style.css", "text/css");
351 | }
352 | 
353 | void onjs_jqueryRequest(AsyncWebServerRequest * request) {
354 |   IPAddress remote_ip = request->client()->remoteIP();
355 |  // Serial.println("[" + remote_ip.toString() +
356 |  //                "] HTTP GET request of " + request->url());
357 |   request->send(SPIFFS, "/jquery-3.4.1.min.js", "text/javascript");
358 | }
359 | 
360 | void onjs_liveRequest(AsyncWebServerRequest * request) {
361 |   IPAddress remote_ip = request->client()->remoteIP();
362 |   //Serial.println("[" + remote_ip.toString() +
363 |   //               "] HTTP GET request of " + request->url());
364 |   request->send(SPIFFS, "/live.js", "text/javascript");
365 | }
366 | 
367 | void onjs_playerRequest(AsyncWebServerRequest * request) {
368 |   IPAddress remote_ip = request->client()->remoteIP();
369 |   //Serial.println("[" + remote_ip.toString() +
370 |   //               "] HTTP GET request of " + request->url());
371 |   request->send(SPIFFS, "/player.js", "text/javascript");
372 | }
373 | 
374 | //void onjs_socketRequest(AsyncWebServerRequest *request) {
375 | //  IPAddress remote_ip = request->client()->remoteIP();
376 | //  Serial.println("[" + remote_ip.toString() +
377 | //                 "] HTTP GET request of " + request->url());
378 | //  request->send(SPIFFS, "/socket.io.min.js", "text/javascript");
379 | //}
380 | 
381 | // Callback: send 404 if requested file does not exist
382 | void onPageNotFound(AsyncWebServerRequest * request) {
383 |   IPAddress remote_ip = request->client()->remoteIP();
384 |   //Serial.println("[" + remote_ip.toString() +
385 |   //               "] HTTP GET request of " + request->url());
386 |   request->send(404, "text/plain", "Not found");
387 | }
388 | 
389 | 
390 | void setup() {
391 |   Serial.begin(115200);
392 | 
393 |   // Make sure we can read the file system
394 |   if ( !SPIFFS.begin()) {
395 |     Serial.println("Error mounting SPIFFS");
396 |     while (1);
397 |   }
398 | 
399 |   //I2S_BITS_PER_SAMPLE_8BIT 配置的话，下句会报错，
400 |   //最小必须配置成I2S_BITS_PER_SAMPLE_16BIT
401 |   //I2S_Init(I2S_MODE_RX, 16000, I2S_BITS_PER_SAMPLE_16BIT);
402 | 
403 |   I2S_Init(I2S_MODE_RX, 16000, I2S_BITS_PER_SAMPLE_16BIT);
404 |   connectwifi();
405 | 
406 |   // On HTTP request for root, provide index.html file
407 |   server.on("/", HTTP_GET, onIndexRequest);
408 | 
409 |   // On HTTP request for style sheet, provide style.css
410 |   server.on("/style.css", HTTP_GET, onCSSRequest);
411 | 
412 |   server.on("/jquery-3.4.1.min.js", HTTP_GET, onjs_jqueryRequest);
413 |   server.on("/live.js", HTTP_GET, onjs_liveRequest);
414 |   server.on("/player.js", HTTP_GET, onjs_playerRequest);
415 |   //  server.on("/socket.io.min.js", HTTP_GET, onjs_socketRequest);
416 | 
417 |   // Handle requests for pages that do not exist
418 |   server.onNotFound(onPageNotFound);
419 | 
420 |   // Start web server
421 |   server.begin();
422 | 
423 |   // Start WebSocket server and assign callback
424 |   webSocket.begin();
425 |   webSocket.onEvent(onWebSocketEvent);
426 | }
427 | 
428 | void connectwifi()
429 | {
430 |   if (WiFi.status() == WL_CONNECTED) return;
431 |   WiFi.disconnect();
432 |   delay(200);
433 |   WiFi.config(IPAddress(192, 168, 1, 100), //设置静态IP位址
434 |               IPAddress(192, 168, 1, 1),
435 |               IPAddress(255, 255, 255, 0),
436 |               IPAddress(192, 168, 1, 1)
437 |              );
438 |   WiFi.mode(WIFI_STA);
439 |   Serial.println("Connecting to WIFI");
440 |   WiFi.begin(ssid, password);
441 |   while ((!(WiFi.status() == WL_CONNECTED))) {
442 |     delay(1000);
443 |     Serial.print(".");
444 |   }
445 |   Serial.println("Connected");
446 |   Serial.println("My Local IP is : ");
447 |   Serial.println(WiFi.localIP());
448 | }
449 | 
450 | 
451 | void loop() {
452 |   connectwifi();
453 |   // Look for and handle WebSocket data
454 |   webSocket.loop();
455 | }
456 | 


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