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sma_webbox.node.js
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'use strict';
// SPDX-License-Identifier: GPL-3.0-or-later
// This program will connect to one or more SMA Sunny Webboxes
// to get the Solar Power Generated (current, today, total).
// example configuration in /etc/netdata/node.d/sma_webbox.conf
/*
{
"enable_autodetect": false,
"update_every": 5,
"servers": [
{
"name": "plant1",
"hostname": "10.0.1.1",
"update_every": 10
},
{
"name": "plant2",
"hostname": "10.0.2.1",
"update_every": 15
}
]
}
*/
require('url');
require('http');
var netdata = require('netdata');
if(netdata.options.DEBUG === true) netdata.debug('loaded ' + __filename + ' plugin');
var webbox = {
name: __filename,
enable_autodetect: true,
update_every: 1,
base_priority: 60000,
charts: {},
processResponse: function(service, data) {
if(data !== null) {
var r = JSON.parse(data);
var d = {
'GriPwr': {
unit: null,
value: null
},
'GriEgyTdy': {
unit: null,
value: null
},
'GriEgyTot': {
unit: null,
value: null
}
};
// parse the webbox response
// and put it in our d object
var found = 0;
var len = r.result.overview.length;
while(len--) {
var e = r.result.overview[len];
if(typeof(d[e.meta]) !== 'undefined') {
found++;
d[e.meta].value = e.value;
d[e.meta].unit = e.unit;
}
}
// add the service
if(found > 0 && service.added !== true)
service.commit();
// Grid Current Power Chart
if(d['GriPwr'].value !== null) {
const id = 'smawebbox_' + service.name + '.current';
let chart = webbox.charts[id];
if(typeof chart === 'undefined') {
chart = {
id: id, // the unique id of the chart
name: '', // the unique name of the chart
title: service.name + ' Current Grid Power', // the title of the chart
units: d['GriPwr'].unit, // the units of the chart dimensions
family: 'now', // the family of the chart
context: 'smawebbox.grid_power', // the context of the chart
type: netdata.chartTypes.area, // the type of the chart
priority: webbox.base_priority + 1, // the priority relative to others in the same family
update_every: service.update_every, // the expected update frequency of the chart
dimensions: {
'GriPwr': {
id: 'GriPwr', // the unique id of the dimension
name: 'power', // the name of the dimension
algorithm: netdata.chartAlgorithms.absolute,// the id of the netdata algorithm
multiplier: 1, // the multiplier
divisor: 1, // the divisor
hidden: false // is hidden (boolean)
}
}
};
chart = service.chart(id, chart);
webbox.charts[id] = chart;
}
service.begin(chart);
service.set('GriPwr', Math.round(d['GriPwr'].value));
service.end();
}
if(d['GriEgyTdy'].value !== null) {
const id = 'smawebbox_' + service.name + '.today';
let chart = webbox.charts[id];
if(typeof chart === 'undefined') {
chart = {
id: id, // the unique id of the chart
name: '', // the unique name of the chart
title: service.name + ' Today Grid Power', // the title of the chart
units: d['GriEgyTdy'].unit, // the units of the chart dimensions
family: 'today', // the family of the chart
context: 'smawebbox.grid_power_today', // the context of the chart
type: netdata.chartTypes.area, // the type of the chart
priority: webbox.base_priority + 2, // the priority relative to others in the same family
update_every: service.update_every, // the expected update frequency of the chart
dimensions: {
'GriEgyTdy': {
id: 'GriEgyTdy', // the unique id of the dimension
name: 'power', // the name of the dimension
algorithm: netdata.chartAlgorithms.absolute,// the id of the netdata algorithm
multiplier: 1, // the multiplier
divisor: 1000, // the divisor
hidden: false // is hidden (boolean)
}
}
};
chart = service.chart(id, chart);
webbox.charts[id] = chart;
}
service.begin(chart);
service.set('GriEgyTdy', Math.round(d['GriEgyTdy'].value * 1000));
service.end();
}
if(d['GriEgyTot'].value !== null) {
const id = 'smawebbox_' + service.name + '.total';
let chart = webbox.charts[id];
if(typeof chart === 'undefined') {
chart = {
id: id, // the unique id of the chart
name: '', // the unique name of the chart
title: service.name + ' Total Grid Power', // the title of the chart
units: d['GriEgyTot'].unit, // the units of the chart dimensions
family: 'total', // the family of the chart
context: 'smawebbox.grid_power_total', // the context of the chart
type: netdata.chartTypes.area, // the type of the chart
priority: webbox.base_priority + 3, // the priority relative to others in the same family
update_every: service.update_every, // the expected update frequency of the chart
dimensions: {
'GriEgyTot': {
id: 'GriEgyTot', // the unique id of the dimension
name: 'power', // the name of the dimension
algorithm: netdata.chartAlgorithms.absolute,// the id of the netdata algorithm
multiplier: 1, // the multiplier
divisor: 1000, // the divisor
hidden: false // is hidden (boolean)
}
}
};
chart = service.chart(id, chart);
webbox.charts[id] = chart;
}
service.begin(chart);
service.set('GriEgyTot', Math.round(d['GriEgyTot'].value * 1000));
service.end();
}
}
},
// module.serviceExecute()
// this function is called only from this module
// its purpose is to prepare the request and call
// netdata.serviceExecute()
serviceExecute: function(name, hostname, update_every) {
if(netdata.options.DEBUG === true) netdata.debug(this.name + ': ' + name + ': hostname: ' + hostname + ', update_every: ' + update_every);
var service = netdata.service({
name: name,
request: netdata.requestFromURL('http://' + hostname + '/rpc'),
update_every: update_every,
module: this
});
service.postData = 'RPC={"proc":"GetPlantOverview","format":"JSON","version":"1.0","id":"1"}';
service.request.method = 'POST';
service.request.headers['Content-Length'] = service.postData.length;
service.execute(this.processResponse);
},
configure: function(config) {
var added = 0;
if(typeof(config.servers) !== 'undefined') {
var len = config.servers.length;
while(len--) {
if(typeof config.servers[len].update_every === 'undefined')
config.servers[len].update_every = this.update_every;
if(config.servers[len].update_every < 5)
config.servers[len].update_every = 5;
this.serviceExecute(config.servers[len].name, config.servers[len].hostname, config.servers[len].update_every);
added++;
}
}
return added;
},
// module.update()
// this is called repeatidly to collect data, by calling
// netdata.serviceExecute()
update: function(service, callback) {
service.execute(function(serv, data) {
service.module.processResponse(serv, data);
callback();
});
},
};
module.exports = webbox;