68 lines
1.3 KiB
JavaScript
68 lines
1.3 KiB
JavaScript
const GPIO = require("onoff").Gpio;
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const WS = require("ws");
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const HEARTBEAT_INT = 400;
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const button = new GPIO(4, "in", "both", {debounceTimeout: 30, activeLow: true});
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const ledOnAir = new GPIO(24, "low");
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const ledReady = new GPIO(23, "low");
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const ws = new WS('ws://10.0.0.4:2000');
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let currentID = 0;
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let heartBeat;
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ws.on('open', () => {
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button.watch((e, value) => {
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if(e) {
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console.error("Error on button watch:", e);
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return;
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}
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if(value) {
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ws.send(JSON.stringify({type: 'button-press'}));
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} else {
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ws.send(JSON.stringify({type: 'button-release'}));
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}
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ledOnAir.write(value, (e) => e && console.error("Error writing to led: ", e));
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});
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heartBeat = setInterval(() => {
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button.read((e, buttonState) => {
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console.log("Button state!", buttonState);
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if(e) {
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return console.error("Error reading button state!", e);
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}
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ws.send(JSON.stringify({
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type: 'button-update',
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body: {buttonState}
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}));
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});
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}, 400);
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ledReady.write(1, console.error);
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});
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ws.on('error', (e) => {
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console.error(e);
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cleanup();
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process.exit();
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});
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function cleanup() {
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ledOnAir.unexport();
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ledReady.unexport();
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button.unexport();
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ws.close();
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if(heartBeat) {
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cancelInterval(heartBeat);
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heartBeat = null;
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}
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}
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process.on('SIGINT', () => {
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cleanup();
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});
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