Node.js 如何正确读取节点js中的serialport?
这是我在NodeJS中从arduino的串行数据端口读取的代码Node.js 如何正确读取节点js中的serialport?,node.js,arduino,node-serialport,Node.js,Arduino,Node Serialport,这是我在NodeJS中从arduino的串行数据端口读取的代码 var SerialPort = require('serialport'); var io = require('socket.io').listen(3000); var serialPort = new SerialPort("COM4", { baudRate: 9600, parser: new SerialPort.parsers.Readline("\n") }); io.sockets.on('c
var SerialPort = require('serialport');
var io = require('socket.io').listen(3000);
var serialPort = new SerialPort("COM4", {
baudRate: 9600,
parser: new SerialPort.parsers.Readline("\n")
});
io.sockets.on('connection', function(socket){
socket.on('message', function(msg){
console.log(msg);
});
socket.on('disconnected', function(){
console.log('disconnected');
});
});
var clearData = "";
var readData = "";
serialPort.on('open',function(){
console.log('open');
serialPort.on('data', function(data){
console.log(data);
readData += data.toString();
io.sockets.emit('message',data);
});
});
这是我在Arduino中的代码,它只是一个简短的示例
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
}
void loop() {
// put your main code here, to run repeatedly:
Serial.println("Hello");
delay(2000);
}
但是,在node js的控制台中,打印数据时显示以下内容:
如何在一行中正确获取数据?
有这样的东西:
const {StringStream} = require('scramjet');
serialport.on('open', () => console.log('open');
serialport.pipe(new StringStream) // pipe the stream to scramjet StringStream
.lines('\n') // split per line
.each( // send message per every line
data => io.sockets.emit('message',data)
);
你好
你好
您好我无法进行端到端的测试(附近没有arduino),但由于
serialport
似乎实现了一个可读的流,因此我会尝试使用以下方法:
const {StringStream} = require('scramjet');
serialport.on('open', () => console.log('open');
serialport.pipe(new StringStream) // pipe the stream to scramjet StringStream
.lines('\n') // split per line
.each( // send message per every line
data => io.sockets.emit('message',data)
);
超音速燃烧冲压发动机将为您解决读线问题。我使用使用RS-232协议的串行端口设备测试了此代码。它的优点是不需要从npm安装第三个包
var recVal = '';
mySerial.on('data', function(data) {
if(data.indexOf('\n') != -1) {
io.emit('serial:data', {
value: recVal
});
console.log("Data: ", recVal.toString());
recVal = '';
} else {
recVal = recVal.concat(data);
}
});
谢谢你,先生,我也在为类似的事情苦苦挣扎,你的回答对我帮助很大!