[英]Cannot Display two String Array Esp8266 on data parser nodejs
我有从ESP8266测得的数据,这些数据存储在一个字符串数组中,并使用Node.js显示到JavaScript HTML,但我只是将数据作为一个数组而不是作为两个数组来获取。
我的Arduino代码:
...
int temp1, hum1, temp2, hum2;
...
void setup(){
serial.begin(9600);
serial1.begin(115200);
...
}``
void loop(){
...
float t1 = bme1.readTemperature();
float h1 = bme1.readHumidity();
float t2 = bme2.readTemperature();
float h2 = bme2.readHumidity();
temp1 = t1;
hum1 = h1;
temp2 = t2;
hum2 = h2;
getStrings();
delay(3000);
...
}
void getStrings(){
String measure1=" "; String measure2=" ";
measure1 += temp1;
measure1 += " ";
measure1 += hum1;
measure1 += " ";
Serial.println(measure1);
measure2 += temp2;
measure2 += " ";
measure2 += hum2;
measure2 += " ";
Serial.println(measure2);
}
我的串行监视器显示:
measure1: 12.34 23.45
measure2: 34.56 45.67
我的Node.js代码:
var exs = require('express');
var app = exs();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var port = require('serialport');
var parsers = port.parsers;
var parser = new parsers.Readline({delimiter:'\n'});
var ports = new port("/dev/ttyUSB0", {baudRate:115200,parser:parser}, false);
process.setMaxListeners(Infinity);
ports.pipe(parser);
ports.on('open', function(){
console.log('portOpened');
io.on('connection', function(socket){
ports.on('data', function(data){
console.log('data: '+data);
parser.on('data', function(data){
var result = data.split(" ");
var temp-1 = result[1]
var hum-1 = result[2]
var temp-2 = result[3]
var hum-2 = result[4];
io.sockets.emit('update', {
tmp_1:temp-1.toString()+' *C',
hum_1:hum-1.toString()+' %',
tmp_2:temp-2.toString()+' *C',
hum_2:hum-2.toString()+' %'
});
});
});
});
});
...
当我调用npm start
,我只是将所有数据作为一个数组日志获取:
data: 12.34 23.45 34.56 45.67
不是我想要的两个数组的日志,像这样:
字符串数组“ measure1”为:
data1: 12.34 23.45
字符串数组“ measure2”为:
data2: 34.56 45.67
数据解析器只有一个字符串数组而不是两个字符串数组!
对不起,我英语不好。
var hum-2 = result[2]
应该
var hum-1 = result[2]
完整的代码将是
ports.on('data', function(data){
console.log('data: '+data);
parser.on('data', function(data){
var result = data.split(" ");
var temp-1 = result[1]
var hum-1 = result[2]
var temp-2 = result[3]
var hum-2 = result[4];
var data1 = temp-1+' '+hum-1;
var data2 = temp-2+' '+hum-2;
console.log('data1: '+data1);
console.log('data2: '+data2);
io.sockets.emit('update', {
tmp_1:temp-1.toString()+' *C',
hum_1:hum-1.toString()+' %',
tmp_2:temp-2.toString()+' *C',
hum_2:hum-2.toString()+' %'
});
});
});
现在,您将拥有两个不同的变量中的数据。
在开始下一个串行输出之前,请确保将串行刷新出缓冲区:
void getStrings(){
String measure1=" "; String measure2=" ";
measure1 += temp1;
measure1 += " ";
measure1 += hum1;
measure1 += " ";
Serial.println(measure1);
Serial.flush(); // FLUSH
measure2 += temp2;
measure2 += " ";
measure2 += hum2;
measure2 += " ";
Serial.println(measure2);
Serial.flush(); // FLUSH
}
解析器在消息之间找不到分隔符“ \\ n”。
在您的arduino代码中,添加一行measure2 += "\\n";
void getStrings(){
String measure1=" "; String measure2=" ";
measure1 += temp1;
measure1 += " ";
measure1 += hum1;
measure1 += " ";
Serial.println(measure1);
measure2 += temp2;
measure2 += " ";
measure2 += hum2;
measure2 += " ";
measure2 += "\n";
Serial.println(measure2);
}
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