nodejs获取串口中的信息

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获取扫描仪中的信息并传到指定服务器 app.js代码

const http = require('http');
const SerialPort = require("serialport");
const port = new SerialPort('com3');
const fs = require('fs');
var querystring = require('querystring'); 
const config=JSON.parse(fs.readFileSync('profile.json').toString()).config;


port.on('open',function(){
    port.write('main screen turn on ',function(err){
        if(err){
            return console.log('打开串口失败: ' ,err.message);
        }
        console.log('打开串口成功');
    });
})

port.on('data',function(data){
    console.log('Data: '+data);
    var data = {'code': data};//这是需要提交的数据 
    var content = querystring.stringify(data);

    var options = config.address
    options.path = config.address.path +'?'+ content
    var req = http.request(options, function (res) {  
     // console.log('STATUS: ' + res.statusCode);  
     // console.log('HEADERS: ' + JSON.stringify(res.headers));  
     res.setEncoding('utf8');  
     res.on('data', function (chunk) {  
         console.log('BODY: ' + chunk);  
     });  
    });  

    req.on('error', function (e) {  
     console.log('发起请求失败: ' + e.message);  
    });  

    req.end();
});

port.on('error',function(err){
    console.log('打开串口失败: ',err.message);
})



package.json

{
  "name": "HidPos",
  "version": "1.0.0",
  "main": "app.js",
  "dependencies": {
    "cors": "^2.8.5",
    "express": "^4.16.4",
    "serialport": "^9.0.7",
    "ws": "^7.4.4"
  }
}

profile.json 配置文件的信息

{
  "config": {
    "scanningGun": "",
    "address":{  
     "hostname": "192.168.0.16",  
     "port": 8091,  
     "path": "/login",  
     "method": "GET"  
    }
  }
}
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