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index.js
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index.js
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#!/usr/bin/env node
const Mqtt = require('mqtt');
const request = require('request');
const log = require('yalm');
const pkg = require('./package.json');
const config = require('./config.js');
const cookieJar = request.jar();
log.setLevel(['debug', 'info', 'warn', 'error'].indexOf(config.verbosity) === -1 ? 'info' : config.verbosity);
log.info(pkg.name + ' ' + pkg.version + ' starting');
log.info('mqtt trying to connect', config.url);
const mqtt = Mqtt.connect(config.url, {will: {topic: config.name + '/connected', payload: '0', retain: true}});
function mqttPub(topic, payload, options) {
if (typeof payload !== 'string') {
payload = JSON.stringify(payload);
}
log.debug('mqtt >', topic, payload);
mqtt.publish(topic, payload, options);
}
mqttPub(config.name + '/connected', '1');
let connected;
mqtt.on('connect', () => {
connected = true;
log.info('mqtt connected ' + config.url);
});
mqtt.on('close', () => {
if (connected) {
connected = false;
log.info('mqtt closed ' + config.url);
}
});
mqtt.on('error', () => {
log.error('mqtt error ' + config.url);
});
let numMeters;
const names = {};
getAuthCookie(getMeters);
function getAuthCookie(callback) {
log.info('trying to get auth cookie from ' + config.smartmeter);
request.get({
url: 'http://' + config.smartmeter + '/index.php',
jar: cookieJar
}, err => {
if (err) {
log.error('auth failed');
process.exit(1);
} else {
log.info('auth successful');
mqttPub(config.name + '/connected', '2', {retain: true});
callback();
}
});
}
function getMeters() {
request.get({
url: 'http://' + config.smartmeter + '/mum-webservice/meters.php',
jar: cookieJar
}, (err, res, body) => {
if (err) {
log.error('getMeters failed');
process.exit(1);
}
const data = JSON.parse(body);
if (!data.authentication) {
log.error('auth failure');
mqttPub(config.name + '/connected', '1', {retain: true});
setTimeout(() => {
getAuthCookie(getMeters);
}, 60000);
return;
}
const meters = data.meters;
numMeters = meters.length;
log.info('got', numMeters, 'meters');
for (let i = 0; i < meters.length; i++) {
names[i] = meters[i].label;
// Names[i] = names[i].replace(/Teridian/, 'Gesamtverbrauch');
log.debug(i, meters[i]);
}
log.info('entering loop');
loop();
});
}
let meterIndex = 0;
function loop() {
if (++meterIndex >= numMeters) {
meterIndex = 0;
}
getValue(meterIndex, () => {
setTimeout(loop, config.interval);
});
}
function getValue(meterId, callback) {
log.debug('request meterId', meterId);
request.post({
jar: cookieJar,
url: 'http://' + config.smartmeter + '/mum-webservice/consumption.php?meter_id=' + meterId
}, (err, res, body) => {
if (err) {
log.error(err);
process.exit(1);
}
let data;
try {
data = JSON.parse(body);
} catch (err) {
log.error(err.message);
return;
}
log.debug('<', JSON.stringify(data));
if (!data.authentication) {
mqttPub(config.name + '/connected', '1', {retain: true});
log.error('auth failure');
getAuthCookie(getMeters);
return;
}
mqttPub(config.name + '/status/' + names[meterId], {val: parseFloat((data.sum_power * 1000).toFixed(1))}, {retain: true});
mqttPub(config.name + '/status/' + names[meterId] + '/energy', {val: parseFloat((data.sum_energy).toFixed(3))}, {retain: true});
callback();
});
}
process.on('SIGINT', () => {
log.info('got SIGINT. exiting.');
process.exit(0);
});
process.on('SIGTERM', () => {
log.info('got SIGTERM. exiting.');
process.exit(0);
});