nodejs获取串口中的信息

获取扫描仪中的信息并传到指定服务器 app.js代码

1const http = require('http');
2const SerialPort = require("serialport");
3const port = new SerialPort('com3');
4const fs = require('fs');
5var querystring = require('querystring'); 
6const config=JSON.parse(fs.readFileSync('profile.json').toString()).config;
7
8
9port.on('open',function(){
10	port.write('main screen turn on ',function(err){
11		if(err){
12			return console.log('打开串口失败: ' ,err.message);
13		}
14		console.log('打开串口成功');
15	});
16})
17
18port.on('data',function(data){
19    console.log('Data: '+data);
20	var data = {'code': data};//这是需要提交的数据 
21	var content = querystring.stringify(data);
22
23	var options = config.address
24	options.path = config.address.path +'?'+ content
25	var req = http.request(options, function (res) {  
26	 // console.log('STATUS: ' + res.statusCode);  
27	 // console.log('HEADERS: ' + JSON.stringify(res.headers));  
28	 res.setEncoding('utf8');  
29	 res.on('data', function (chunk) {  
30		 console.log('BODY: ' + chunk);  
31	 });  
32	});  
33
34	req.on('error', function (e) {  
35	 console.log('发起请求失败: ' + e.message);  
36	});  
37
38	req.end();
39});
40
41port.on('error',function(err){
42    console.log('打开串口失败: ',err.message);
43})
44
45  
46  
47

package.json

1{
2  "name": "HidPos",
3  "version": "1.0.0",
4  "main": "app.js",
5  "dependencies": {
6    "cors": "^2.8.5",
7    "express": "^4.16.4",
8    "serialport": "^9.0.7",
9    "ws": "^7.4.4"
10  }
11}
12

profile.json 配置文件的信息

1{
2  "config": {
3    "scanningGun": "",
4	"address":{  
5	 "hostname": "192.168.0.16",  
6	 "port": 8091,  
7	 "path": "/login",  
8	 "method": "GET"  
9	}
10  }
11}
12