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server.js
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server.js
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"use strict";
const http = require("http");
const b = require("bonescript");
const POWER_OUTPUT_PIN = "P9_23";
const MANUAL_OUTPUT_PIN = "P9_15";
const GRINDER_OUTPUT_PIN = "P9_25";
const LED_INPUT_PIN = "P9_41";
const PROVING_TIME = 600;
const GRIND_TIME = 12000;
const BREW_TIME = 40000;
const AUTO_OFF_TIME = 300000;
var _ledInValue = 0;
var _ledInChangeTime = Date.now();
var _ledInTimer = null;
var _heating = false;
var _ready = false;
var _proving = true;
var _grinderRuns = 0;
var _grinderStarted = false;
var _brewRuns = 0;
var _isBrewing = false;
var _offTimer = null;
var _offTimerStartTime = -1
b.pinMode(POWER_OUTPUT_PIN, b.OUTPUT);
b.digitalWrite(POWER_OUTPUT_PIN, b.LOW);
b.pinMode(GRINDER_OUTPUT_PIN, b.OUTPUT);
b.digitalWrite(GRINDER_OUTPUT_PIN, b.LOW);
b.pinMode(MANUAL_OUTPUT_PIN, b.OUTPUT);
b.digitalWrite(MANUAL_OUTPUT_PIN, b.LOW);
b.pinMode(LED_INPUT_PIN, b.INPUT);
b.attachInterrupt(LED_INPUT_PIN, true, b.CHANGE, (err, response) => {
//console.log(err);
//console.log(response);
if (response.value === _ledInValue) return;
_ledInValue = response.value;
_ledInChangeTime = Date.now();
_proving = true;
_ledInTimer = setTimeout(() => {
_proving = Date.now() - _ledInChangeTime < PROVING_TIME;
_ready = !_proving && _ledInValue == 1;
_heating = _proving && (_heating || _ledInValue == 1);
startGrinderIfReady();
brewIfReady();
if (!_ready && !_heating) stopGrinder();
if (_ready && _offTimerStartTime < 0) startOffTimer();
if (!_ready && !_heating && !_proving && _offTimerStartTime > 0) stopOffTimer();
}, PROVING_TIME + 100);
});
const pushButton = function (output) {
b.digitalWrite(output, b.HIGH);
setTimeout(() => {
b.digitalWrite(output, b.LOW);
}, 200);
};
const startGrinderIfReady = function () {
if (_ready && _grinderRuns > 0) {
b.digitalWrite(GRINDER_OUTPUT_PIN, b.HIGH);
if (!_grinderStarted) {
setTimeout(() => {
_grinderRuns = _grinderRuns > 0 ? _grinderRuns - 1 : 0;
if (_grinderRuns < 1) stopGrinder();
else {
_grinderStarted = false;
startGrinderIfReady();
}
}, GRIND_TIME);
_grinderStarted = true;
}
}
};
const stopGrinder = function () {
b.digitalWrite(GRINDER_OUTPUT_PIN, b.LOW);
if (_grinderStarted) {
_grinderStarted = false;
_grinderRuns = 0;
}
};
const brewIfReady = function () {
if (_ready && _brewRuns > 0 && !_isBrewing) {
pushButton(MANUAL_OUTPUT_PIN);
_isBrewing = true;
setTimeout(() => {
if (_isBrewing) {
pushButton(MANUAL_OUTPUT_PIN);
_isBrewing = false;
_brewRuns = _brewRuns > 0 ? _brewRuns - 1 : 0;
}
setTimeout(brewIfReady, 500);
}, BREW_TIME);
}
};
const startOffTimer = function() {
_offTimer = setTimeout(turnOff, AUTO_OFF_TIME);
_offTimerStartTime = Date.now();
}
const stopOffTimer = function() {
clearTimeout(_offTimer);
_offTimerStartTime = -1;
}
const getOffTimerRemaining = function() {
return _offTimerStartTime > 0 ? _offTimerStartTime + AUTO_OFF_TIME - Date.now() : 0;
}
const turnOff = function() {
_offTimerStartTime = -1;
pushButton(POWER_OUTPUT_PIN);
}
http
.createServer((req, res) => {
let statusCode = 200;
if (req.url.endsWith("api/pushPower")) {
_ready = false;
_heating = !_heating;
pushButton(POWER_OUTPUT_PIN);
} else if (req.url.endsWith("api/pushGrinder") || req.url.endsWith("api/incgrinderruns")) {
_grinderRuns = _grinderRuns < 5 ? _grinderRuns + 1 : 0;
startGrinderIfReady();
} else if (req.url.endsWith("api/incbrewruns")) {
_brewRuns = _brewRuns < 2 ? _brewRuns + 1 : 0;
brewIfReady();
} else if (req.url.endsWith("api/read")) {
} else if (req.url.endsWith("api/kill")) {
setTimeout(() => {
process.exit(0);
}, 1000);
} else {
statusCode = 404;
}
res.setHeader("Access-Control-Allow-Origin", "*");
res.setHeader("Access-Control-Request-Method", "*");
res.setHeader("Access-Control-Allow-Methods", "OPTIONS, GET");
res.setHeader("Access-Control-Allow-Headers", "*");
res.writeHead(statusCode, { "Content-Type": "text/json" });
//console.log(req.url);
//console.log(ledInValue);
res.end(
JSON.stringify({
url: req.url,
heating: _heating,
ready: _ready,
proving: _proving,
grinderRuns: _grinderRuns,
brewRuns: _brewRuns,
offTimer: getOffTimerRemaining()
})
);
})
.listen(8081);