Arduino與Node.js不工作

Question

我正在一個項目有一個Arduino Uno和使用UDP連接，它會發送數據到我的Mac運行一個Node.js模塊來獲取該數據並打印它出。

這裏是我的Arduino代碼：

#include <SPI.h> 
#include <Ethernet.h> 
#include <EthernetUdp.h> 
//Import the necessary packages. 

byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED}; //Arduino's MAC address. 
IPAddress IP(192, 168, 1, 152); //Arduino's IP address. 
unsigned int arduinoPort = 8888; //Arduino's transmission port. 

IPAddress recieverIP(192, 168, 1, 77); //Mac's IP address. 
unsigned int recieverPort = 6000; //Mac's transmission port. 

EthernetUDP udp; 

int sensorPin = 2; //The pin on the Arduino the PIR sensor is connected to. 
int sensorStatus; //The PIR sensor's status. 

void setup() 
{ 
    Serial.begin(9600); 
    Ethernet.begin(mac, IP); //Starting the Ethernet functionality. 
    udp.begin(arduinoPort); //Starting the UDP server's functionality. 
} 

void loop() 
{ 
    Serial.println("YES"); 
    udp.beginPacket(recieverIP, recieverPort); 
    udp.write("YES"); 
    udp.endPacket(); 
    delay(10); 
} 

下面是我的Node.js模塊的代碼：

var dgram = require('dgram'); 
var server = dgram.createSocket("udp4"); 
var fs = require('fs'); 

var crlf = new Buffer(2); 
crlf[0] = 0xD; 
crlf[1] = 0xA; 

server.on("Message", function(msg, rinfo) 
{ 
    console.log("Server got : " + msg.readUInt16LE(0) + " from : " + rinfo.address + " : " + rinfo.port); 
}); 

server.on("Listening", function() 
{ 
    var address = server.address(); 
    console.log("Server listening @ " + address.address + " : " + address.port); 
}); 

server.bind(6000); 

當我運行的代碼，也沒有在終端打印的值。出了什麼問題？謝謝。

Answer 1

你不應該大寫dgram套接字的事件。

1. Message應message
2. Listening應listening

所以這個

var dgram = require("dgram"); 
var server = dgram.createSocket("udp4"); 

server.on('listening' /*Correct*/,function(){ 
console.log("it fires"); 
}); 

server.on('Listening' /*Wrong*/,function(){ 
console.log("it doesn't fire"); 
}); 

server.bind(6000); 

一個小例子