我想从Web界面控制我的Arduino,所以我在ReactJS中创建了客户端,在ExpressJS中创建了服务器端(包括Johnny-Five)。
我只想根据用户输入实时更新LED闪烁的间隔。这是我的服务器代码:
const express = require('express');
const bodyParser = require('body-parser');
const five = require('johnny-five');
const app = express();
const board = new five.Board();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
board.on('ready', function () {
app.post("/api/led-flash", function (req, res) {
let led = new five.Led(13);
led.blink(req.body.interval);
});
});
app.listen("5000", () => {
console.log("App listening on port 5000");
});
代码似乎只适用于一开始的几个请求。 这样做的正确方法是什么?
答案 0 :(得分:1)
您希望在电路板准备好后启动服务器。如下所示:
const express = require('express');
const bodyParser = require('body-parser');
const five = require('johnny-five');
const app = express();
const board = new five.Board();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.post("/api/led-flash", function (req, res) {
// perform some initial cleanup work if needed like resetting LEDs.
// ...
let led = new five.Led(13);
led.blink(req.body.interval);
res.json({ message: 'success!'})
// Some additional work after success
// ...
});
function startServer() {
app.listen("5000", () => {
console.log("App listening on port 5000");
});
}
board.on('ready', startServer);
以上是未经测试的,但如果您找到了解决方案,请发布解决方案!