84 lines
2.5 KiB
JavaScript
84 lines
2.5 KiB
JavaScript
// npm module for Raspberri Pi GPIO
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var gpio = require('rpi-gpio');
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// Module for importing environment variables
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var dotenv = require('dotenv').config();
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// Module for working with files
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var fs = require('fs');
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// Set up GPIO 4 (pysical pin 7) as output, then call cycleAuger()
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gpio.setup(7, gpio.DIR_OUT, cycleAuger);
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// Turns the auger on (Pin 7 high)
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function augerOn(err) {
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if (err) throw err;
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gpio.write(7, true, function(err) {
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if (err) throw err;
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if (process.env.DEBUG == "true") console.log('Auger turned on.');
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});
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}
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// Turns the auger off (pin 7 low)
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function augerOff(err) {
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if (err) throw err;
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gpio.write(7, false, function(err) {
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if (err) throw err;
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if (process.env.DEBUG == "true") console.log('Auger turned off.');
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});
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}
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// Identical functions as above for debugging without gpio
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// function augerOff() {
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// console.log('Auger turned off.');
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// }
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// function augerOn() {
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// console.log('Auger turned on.');
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// }
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// Sleeps for any given milliseconds, call with await
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function sleep(ms) {
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return new Promise((resolve) => {
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setTimeout(resolve, ms);
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if (process.env.DEBUG == "true") console.log(`Slept for ${ms}ms`);
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});
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}
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// Main function, turns the auger on, sleeps for the time given in environment variables, then turns the auger off, sleeps, repeats.
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async function cycleAuger(err) {
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if (err) throw err;
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// Check for pause file existing, then sleep for preset time, then run the function again.
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if (fs.existsSync('./pause')) {
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console.log('Paused...');
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await sleep(process.env.PAUSETIME);
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cycleAuger();
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return;
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}
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// Check for reload file existing, then reload environment variables, then delete the file.
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if (fs.existsSync('./reload')) {
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var dotenv = require('dotenv');
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dotenv.config({ override: true })
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fs.unlink('./reload', (err) => {
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if (err) throw err;
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console.log('Deleted reload file.');
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});
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console.log('Reloaded environment variables.');
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}
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// Check for quit file existing, then delete it, then quit the program
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if (fs.existsSync('./quit')) {
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fs.unlink('./quit', (err) => {
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if (err) throw err;
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console.log('Removed quit file.');
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});
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console.log('Quitting.');
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process.exit();
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}
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// If none of the above checks are true, cycle the auger on and off, then repeat
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augerOn();
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await sleep(process.env.ONTIME);
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augerOff();
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await sleep(process.env.OFFTIME);
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cycleAuger();
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} |