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sabicalija/toggle-led-server.js

Created October 20, 2019 23:50
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Johnny 5 goes Raspberry Pi 3
Raw
toggle-led-server.js
const { Board, Led} = require("johnny-five");
const { RaspiIO } = require("raspi-io");
const board = new Board({
io: new RaspiIO()
});
const http = require("http");
const host = "127.0.0.1";
const port = 80;
let led = null;
let ledState = false;
board.on("ready", () => {
console.log("Setting up LED on Port GPIO23");
led = new Led("GPIO23");
server.listen(port, host, () => {
console.log(`Server listening on http://${host}:${port}/`);
});
});
const page = (state) => {
return `<html>
<head>
<title>Raspberry Pi 3 - IO</title>
<style>
.active {
background-color: green;
color: white;
}
</style>
</head>
<body>
<form method="POST" action="/led/toggle">
<button ${state ? "class='active'" : ""} type="submit">Toggle</button>
</form>
</body>
</html>`;
};
const toggle = () => {
console.log("Toggling LED...");
if (ledState) {
ledState = false;
led.off();
} else {
ledState = true;
led.on();
}
};
const server = http.createServer((req, res) => {
const { url } = req;
if (url === "/led/toggle") {
res.writeHead(302, { Location: "/" });
toggle();
return res.end();
}
res.end(page(ledState));
});
Raw
toggle-led.js
const { Board, Led} = require("johnny-five");
const { RaspiIO } = require("raspi-io");
const board = new Board({
io: new RaspiIO()
});
board.on("ready", () => {
console.log("Setting up LED on Port GPIO23");
const led = new Led("GPIO23");
led.blink(500);
});
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