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server.js
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server.js
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// web server
const express = require('express'),
app = express(),
http = require('http').createServer(app),
io = require('socket.io')(http);
// sensor data
const raspi = require('raspi-io'),
five = require('johnny-five'),
board = new five.Board({io: new raspi()});
const EVENTS = {
MOTION_DETECTED: 'motion detected'
};
board.on('ready', function() {
console.log('board is ready');
// Create a new `motion` hardware instance.
const motion = new five.Motion('P1-7'); //pin 7 (GPIO 4)
// 'calibrated' occurs once, at the beginning of a session,
motion.on('calibrated', function() {
console.log('calibrated');
});
//send motiondata reading out to connected clients
//w/ sockets
io.on('connection', (socket) => {
console.log('connection user');
// 'motionstart' events are fired when the 'calibrated'
// proximal area is disrupted, generally by some form of movement
motion.on('motionstart', function() {
console.log('motionstart', Date.now());
socket.emit(EVENTS.MOTION_DETECTED);
});
// 'motionend' events are fired following a 'motionstart' event
// when no movement has occurred in X ms
motion.on('motionend', function() {
console.log('motionend', Date.now());
});
// The "change" event is fired whenever a change within the motion detection field is observed.
//motion.on('change', function() {
// console.log('change');
//});
//The "data" event is fired as frequently as the user defined freq will allow in milliseconds.
//motion.on('data', function(data) {
// console.log(data);
//});
});
});
//tell the server that ./public/ contains the static webpages
app.use(express.static('public'));
http.listen(8080, () => {
console.log('listening on *:8080');
});