Open Charge Point Protocol Implementation in JS
npm install --save ocpp-js
Open Charge Point Protocol (OCPP, http://ocppforum.net) is a communication protocol between multiple charging stations ("charge points") and a single management software ("central system").
Currently two OCPP versions (1.2 and 1.5) have been released. There is a draft in progress for a new version (2.0). Both existing versions use SOAP over HTTP as the RPC/transport protocol:
+---------------+ soap/http client soap/http server +----------------+
| |--------------------------------------->| |
| | Operations initiated by ChargePoint | |
| Charge Point | | Central System |
| | soap/http server soap/http client | |
| |<---------------------------------------| |
+---------------+ Operations initiated by CentralSystem +----------------+
OCPP JS uses a MongoDB DB to store all the actions received from charge points example: BootNotification, MeterValues, StartTransaction ... Currently, the project supports MongoDB, firebase and file storage. In order to specify which DB to use, create a folder config, and then create a file default.json and insert your preferred storage method:
{
"defaultDB": "mongodb",
"mongodb": {
"url": "mongodb://localhost/mydb"
},
"firebase": {
"apiKey": "[apiKey]",
"authDomain": "[authDomain]",
"databaseURL": "[databaseURL]",
"storageBucket": "[storageBucket]",
"messagingSenderId": "[messagingSenderId]"
}
}
You can use Firebase by setting defaultDB : firebase.
To be able to create a Central System, some charging points and a charging point server, you can use this code snippet:
var OCPP = require('ocpp-js');
var options = {
centralSystem: {
port: 9220
},
chargingPoint: {
serverURI: 'http://localhost:9221/Ocpp/ChargePointService',
name: 'Simulator 1'
},
chargingPointServer: {
port: 9221
}
}
var ocppJS = new OCPP(options);
// Create Central System
var centralSystem = ocppJS.createCentralSystem();
// Create Charging Point Client
var chargingPoint1 = ocppJS.createChargingPoint('http://127.0.0.1:8081/ChargeBox/Ocpp', "chargingPoint1-Simulator");
var chargingPoint2 = ocppJS.createChargingPoint('http://localhost:9221/Ocpp/ChargePointService', "chargingPoint2-Simulator");
// Charging Point Params can be also taken from options
var chargingPoint1 = ocppJS.createChargingPoint();
// Create Charging Point Server
var chargingPointServer = ocppJS.createChargingPointServer(9221);