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SmartPlug.js
170 lines (153 loc) · 4.1 KB
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SmartPlug.js
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const mqtt = require('MQTT');
const wifi = require('Wifi');
const devicePrefix = 'house/esp1';
const mqttServer = '10.1.1.186';
const keepAliveInterval = 60;
// set up the mqtt connection. Use getSerial to make
// sure the mqtt client id is unique
var options = {
client_id: getSerial(),
keep_alive: keepAliveInterval
};
const client = mqtt.create(mqttServer, options);
client.on('connected', function () {
console.log('MQTT client connected');
try {
client.subscribe(devicePrefix + '/led');
client.subscribe(devicePrefix + '/power');
client.subscribe(devicePrefix + '/query_state');
} catch (err) {}
});
client.on('disconnected', function() {
setTimeout(function() {
try {
if (client.connected() !== true) {
console.log('mqtt reconnecting');
client.connect();
}
} catch (err) {}
}, 10000);
});
client.on('error', function(err) {
console.log('mqtt err' + err);
setTimeout(function() {
try {
client.connect();
} catch (err) {}
}, 1000);
});
// liveness check, interval must be greater than
// keepAliveInterval
let live = false;
setInterval(() => {
if (live === false) {
// some kind of connection failure either MQTT server
// is down or a communications failure, try resetting
// connectivity
wifi.disconnect();
doConnect();
} else {
live = false;
}
}, (keepAliveInterval + 30) * 1000);
client.on('ping_reply', ()=> {
live = true;
});
// setup control of power and led pins
const powerPin = new Pin(D12);
const ledPin = new Pin(D13);
let powerState = 0;
let ledState = 0;
let flashTimer;
const clearLedFlashTimer = function() {
if (flashTimer !== undefined) {
clearInterval(flashTimer);
flashTimer = undefined;
}
};
const startFlashTimer = function(time) {
if (flashTimer !== undefined) {
clearLedFlashTimer();
}
ledState = (ledState + 1) %2;
flashTimer = setInterval(function() {
ledState = (ledState + 1) %2;
digitalWrite(ledPin, (ledState + 1) % 2);
}, time);
};
client.on('publish', function(message) {
console.log(message);
if (message.topic === (devicePrefix + '/power')) {
if (message.message === 'on') {
powerState = 1;
} else if (message.message === 'off') {
powerState = 0;
}
digitalWrite(powerPin, powerState);
console.log('Power state:' + powerState);
} else if (message.topic === (devicePrefix + '/led')) {
clearLedFlashTimer();
if (message.message === 'on') {
ledState = 1;
} else if (message.message === 'off') {
ledState = 0;
} else if (message.message.substr(0, 'flash'.length) === 'flash') {
try {
timeout = message.message.split(':')[1];
startFlashTimer(timeout);
} catch (err) {
console.log(err);
}
}
digitalWrite(ledPin, (ledState + 1) % 2);
console.log('Led state:' + ledState);
} else if (message.topic === (devicePrefix + '/query_state')) {
try {
client.publish(devicePrefix + '/state/power', powerState);
client.publish(devicePrefix + '/state/led', ledState);
} catch (err) {}
}
});
const buttonPin = new Pin(D0);
let buttonState = 1;
setInterval(function() {
let newState = digitalRead(buttonPin);
if (newState !== buttonState) {
buttonState = newState;
try {
client.publish(devicePrefix + '/button', newState);
} catch (err) {}
if (buttonState === 0) {
powerState = (powerState + 1) %2;
digitalWrite(powerPin, powerState);
}
}
}, 200);
const doConnect = function() {
// ensure we are connected to wifi
console.log('Trying to connect');
wifi.connect('xxxxxxxxxxx', { password: 'xxxxxxxxx'}, function(err) {
if (err) {
console.log('Failed to connect');
console.log(err);
}
});
};
wifi.on('connected', function(details) {
// ok lets start accepting requests
try {
client.connect();
} catch (err) {
console.log('mqtt failed to connect');
console.log(err);
}
console.log('WIFI connected' + details.toString());
});
wifi.on('disconnected', function() {
try {
client.disconnect();
} catch (err) {}
console.log('WIFI disconnected');
doConnect();
});
doConnect();