Node.js 无效握手-arduino使用socket.io与nodejs服务器进行握手

我和我的朋友正在尝试将数据从我们的arduino wifi屏蔽推送到运行socket.io（v1.3.4）框架和express（v4.12.0）框架的nodejs本地服务器

我们尝试了多个库，但现在我们在尝试将http连接升级到websocket连接时出现了“无效握手”错误。知道我们做错了什么吗？尝试连接echo.websocket.org服务确实有效，所以我们假设服务器端缺少一些东西。（使用chrome或其他浏览器时，一切正常）

Node.js服务器代码：

var express = require('express'),
    app = express(),
    server = require('http').createServer(app),
    io = require('socket.io').listen(server),
    seats = [
        {id: 0, status: false},
        {id: 1, status: false},
        {id: 2, status: false},
        {id: 3, status: false},
        {id: 4, status: false},
        {id: 5, status: false},
        {id: 6, status: false},
        {id: 7, status: false},
        {id: 8, status: false},
        {id: 9, status: false},
        {id: 10, status: false},
        {id: 11, status: false},
        {id: 12, status: false},
        {id: 13, status: false},
        {id: 14, status: false},
        {id: 15, status: false}
    ]; //Seats from id 0 --> 15

server.listen(3000);

app.use("/css", express.static(__dirname + '/css'));
app.get('/', function(req, res) {
    res.sendFile(__dirname + '/');
});

// Socket code
io.sockets.on('connection', function (socket) {

    console.log("Somebody connected, push seatlist");
    socket.emit('init-seats', seats);

    // Change status of zetel
    socket.on('zetel-toggle', function (data) {
        console.log("zetel-toggle called");
        seats[data.id].status = data.status;
        io.sockets.emit('change-status', data);
    });

    socket.on('hello', function() {
        console.log("Somebody said hallo");
    });


    socket.on('disconnect', function (data) {
        console.log("Somebody DISconnected");
    });
});

/*io.use(function(socket, next) {
  var handshakeData = socket.request;
    for( variabele in handshakeData) {
        console.log("handshakedata: "+variabele);
    }
  next();
});*/

#include <SPI.h>
#include <WiFi.h>
// Here we define a maximum framelength to 64 bytes. Default is 256.
#define MAX_FRAME_LENGTH 64
// Define how many callback functions you have. Default is 1.
#define CALLBACK_FUNCTIONS 1
#include <WebSocketClient.h>

WiFiClient client;
WebSocketClient webSocketClient;
char ssid[] = "#####"; // Blanked out for stackoverflow
char pass[] = "#####"; // Blanked out for stackoverflow
int status = WL_IDLE_STATUS;
int fsrReading;
int fsrAnalogPin = 1;
int LEDbrightness;

void setup() {
  Serial.begin(9600);
  Serial.println(F("Joining WiFi network..."));
  connectWifi();
  pinMode(13, OUTPUT);

  // Connect to the websocket server
  if (client.connect("192.168.46.238", 3000)) {
  //if (client.connect("echo.websocket.org", 80)) {
    Serial.println("Connected");
  } else {
    Serial.println("Connection failed.");
  }

  // Handshake with the server
  webSocketClient.path = "/";
  webSocketClient.host = "192.168.46.238";

  if (webSocketClient.handshake(client)) {
    Serial.println("Handshake successful");
  } else {
    Serial.println("Handshake failed."); 
  }
}

void loop() {
  String data;
  fsrReading = analogRead(fsrAnalogPin);
  Serial.print("Analog reading = ");
  Serial.println(fsrReading);  
  LEDbrightness = map(fsrReading, 0, 1023, 0, 255);
  analogWrite(13, LEDbrightness);

  if (client.connected()) {

    data = webSocketClient.getData();

    if (data.length() > 0) {
      Serial.print("Received data: ");
      Serial.println(data);
    }

    // capture the value of analog 1, send it along
    pinMode(1, INPUT);
    data = String(LEDbrightness);
    if(LEDbrightness > 200) {
      webSocketClient.sendData("hello");
    } else {    
      webSocketClient.sendData("bye");
    }

  } else {

    Serial.println("Client disconnected.");
    while (1) {
      // Hang on disconnect.
    }
  }

  // Wait to fully let the client disconnect
  delay(500);
}

void connectWifi(void) {
  Serial.println("Attempting to connect to Y&RGroup-visitors using WPA2-Personal ...");
  status = WiFi.begin(ssid, pass);
  delay(5000); // give it at least 10 seconds to attempt a connection

  if(status != WL_CONNECTED) {
    Serial.println("Couldn't establish a wireless connection.");
    Serial.println("Network capabilities have been disabled.");
  } else {
    Serial.println("Wireless connection established.");
    printWifiStatus();
  }  
}

void printWifiStatus() {
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
}

Arduino代码：

var express = require('express'),
    app = express(),
    server = require('http').createServer(app),
    io = require('socket.io').listen(server),
    seats = [
        {id: 0, status: false},
        {id: 1, status: false},
        {id: 2, status: false},
        {id: 3, status: false},
        {id: 4, status: false},
        {id: 5, status: false},
        {id: 6, status: false},
        {id: 7, status: false},
        {id: 8, status: false},
        {id: 9, status: false},
        {id: 10, status: false},
        {id: 11, status: false},
        {id: 12, status: false},
        {id: 13, status: false},
        {id: 14, status: false},
        {id: 15, status: false}
    ]; //Seats from id 0 --> 15

server.listen(3000);

app.use("/css", express.static(__dirname + '/css'));
app.get('/', function(req, res) {
    res.sendFile(__dirname + '/');
});

// Socket code
io.sockets.on('connection', function (socket) {

    console.log("Somebody connected, push seatlist");
    socket.emit('init-seats', seats);

    // Change status of zetel
    socket.on('zetel-toggle', function (data) {
        console.log("zetel-toggle called");
        seats[data.id].status = data.status;
        io.sockets.emit('change-status', data);
    });

    socket.on('hello', function() {
        console.log("Somebody said hallo");
    });


    socket.on('disconnect', function (data) {
        console.log("Somebody DISconnected");
    });
});

/*io.use(function(socket, next) {
  var handshakeData = socket.request;
    for( variabele in handshakeData) {
        console.log("handshakedata: "+variabele);
    }
  next();
});*/

#include <SPI.h>
#include <WiFi.h>
// Here we define a maximum framelength to 64 bytes. Default is 256.
#define MAX_FRAME_LENGTH 64
// Define how many callback functions you have. Default is 1.
#define CALLBACK_FUNCTIONS 1
#include <WebSocketClient.h>

WiFiClient client;
WebSocketClient webSocketClient;
char ssid[] = "#####"; // Blanked out for stackoverflow
char pass[] = "#####"; // Blanked out for stackoverflow
int status = WL_IDLE_STATUS;
int fsrReading;
int fsrAnalogPin = 1;
int LEDbrightness;

void setup() {
  Serial.begin(9600);
  Serial.println(F("Joining WiFi network..."));
  connectWifi();
  pinMode(13, OUTPUT);

  // Connect to the websocket server
  if (client.connect("192.168.46.238", 3000)) {
  //if (client.connect("echo.websocket.org", 80)) {
    Serial.println("Connected");
  } else {
    Serial.println("Connection failed.");
  }

  // Handshake with the server
  webSocketClient.path = "/";
  webSocketClient.host = "192.168.46.238";

  if (webSocketClient.handshake(client)) {
    Serial.println("Handshake successful");
  } else {
    Serial.println("Handshake failed."); 
  }
}

void loop() {
  String data;
  fsrReading = analogRead(fsrAnalogPin);
  Serial.print("Analog reading = ");
  Serial.println(fsrReading);  
  LEDbrightness = map(fsrReading, 0, 1023, 0, 255);
  analogWrite(13, LEDbrightness);

  if (client.connected()) {

    data = webSocketClient.getData();

    if (data.length() > 0) {
      Serial.print("Received data: ");
      Serial.println(data);
    }

    // capture the value of analog 1, send it along
    pinMode(1, INPUT);
    data = String(LEDbrightness);
    if(LEDbrightness > 200) {
      webSocketClient.sendData("hello");
    } else {    
      webSocketClient.sendData("bye");
    }

  } else {

    Serial.println("Client disconnected.");
    while (1) {
      // Hang on disconnect.
    }
  }

  // Wait to fully let the client disconnect
  delay(500);
}

void connectWifi(void) {
  Serial.println("Attempting to connect to Y&RGroup-visitors using WPA2-Personal ...");
  status = WiFi.begin(ssid, pass);
  delay(5000); // give it at least 10 seconds to attempt a connection

  if(status != WL_CONNECTED) {
    Serial.println("Couldn't establish a wireless connection.");
    Serial.println("Network capabilities have been disabled.");
  } else {
    Serial.println("Wireless connection established.");
    printWifiStatus();
  }  
}

void printWifiStatus() {
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
}

#包括
#包括
//这里我们将最大帧长度定义为64字节。默认值为256。
#定义最大帧长度64
//定义有多少个回调函数。默认值为1。
#定义回调函数1
#包括
无线客户端；
WebSocketClient WebSocketClient；
char ssid[]=“######”；//被封锁以防溢出
字符传递[]=“######”；//被封锁以防溢出
int状态=WL\U空闲\U状态；
国际阅读；
int fsrAnalogPin=1；
亮度；
无效设置（）{
Serial.begin（9600）；
Serial.println（F（“加入WiFi网络…”）；
连接WiFi（）；
pinMode（13，输出）；
//连接到websocket服务器
if（客户端连接（“192.168.46.238”，3000））{
//if（client.connect（“echo.websocket.org”，80））{
Serial.println（“已连接”）；
}否则{
Serial.println（“连接失败”）；
}
//与服务器握手
webSocketClient.path=“/”；
webSocketClient.host=“192.168.46.238”；
if（webSocketClient.handshake（客户端））{
Serial.println（“握手成功”）；
}否则{
Serial.println（“握手失败”）；
}
}
void循环（）{
字符串数据；
fsrReading=模拟读取（fsrAnalogPin）；
串行打印（“模拟读取=”）；
Serial.println（fsrreding）；
LED亮度=地图（fsr读数，0，1023，0，255）；
模拟写入（13，LED亮度）；
if（client.connected（））{
data=webSocketClient.getData（）；
if（data.length（）>0）{
串行打印（“接收数据：”）；
Serial.println（数据）；
}
//捕获模拟1的值，并将其发送
pinMode（1，输入）；
数据=字符串（LED亮度）；
如果（LED亮度>200）{
sendData（“你好”）；
}否则{
webSocketClient.sendData（“再见”）；
}
}否则{
Serial.println（“客户端断开连接”）；
而(1){
//挂断。
}
}
//等待完全让客户端断开连接
延迟（500）；
}
无效连接WiFi（无效）{
Serial.println（“尝试使用WPA2 Personal连接到Y&R组访问者…”）；
状态=WiFi.begin（ssid，通过）；
延迟（5000）；//给它至少10秒的时间来尝试连接
如果（状态！=WL\U已连接）{
Serial.println（“无法建立无线连接”）；
Serial.println（“网络功能已被禁用”）；
}否则{
Serial.println（“建立无线连接”）；
printWifiStatus（）；
}  
}
void printWifiStatus（）{
序列号。打印（“SSID:”）；
Serial.println（WiFi.SSID（））；
ip地址ip=WiFi.localIP（）；
串行打印（“IP地址：”）；
序列号println（ip）；
长rssi=WiFi.rssi（）；
串行打印（“信号强度（RSSI）：”；
串行打印（rssi）；
Serial.println（“dBm”）；
}

当我们运行arduino代码时，这是我们在序列中得到的：

欢迎任何意见。。。 我们已经为此工作了好几天，但都没有成功。

---

谢谢

据我所知，服务器侦听端口3000上的连接：

server.listen(3000);

但您的客户端正在尝试连接到端口80：

if (client.connect("192.168.46.238", 80)) {

试试这个：

if (client.connect("192.168.46.238", 3000)) {

---

抱歉，当我们切换到echo.websocket.org测试时，这是一个复制粘贴错误…当我们尝试连接到本地服务器时，我们使用了端口3000-在OPany更新中更改了该端口？您是否设法使其工作或任何替代方案？socket.io和arduino的websocket客户端的问题是它们不兼容。socket.io是websocket之上的一个协议，所以它不一样。你甚至不能将一个简单的websocket客户端从javascript连接到一个socket.io服务器。