Help for SignalR / Websocket

[Newan]

Hello,

thanks for pyeasse. I have a question about this, which is not a issues for pyeasee. I am programming an adapter for ioBroker. Rest also works wonderfully. But You have implemented in pyeasse also the realtime changes via signalr. I can establish the basic connection, but I don't get a status change of the chargers. Is there any documentation somewhere or can you briefly help me adapt this to NodeJs?

const signalR = require("@microsoft/signalr");

let loginToken = "token";
let connection = new signalR.HubConnectionBuilder()
    .withUrl("https://api.easee.cloud/hubs/chargers", { accessTokenFactory: () => loginToken })
    .build();
connection.on("ProductUpdate", data => {
    console.log("ProductUpdae");
    console.log(data);
});
connection.on("ChargerUpdate", data => {
    console.log("ChargerUpdate");
    console.log(data);
});
connection.start()
    .then(() => {
          // Here is my PROBLEM?
          connection.send("SubscribeWithCurrentState", (data) => {
          console.log('Debug inside');
          console.log(data);
      });
    });

[olalid]

Not sure how your code works so not sure if this is a valid comment, but the websocket must connect first before subscribe works, and you must supply a valid product ID to the call, i.e. you can not subscribe generally to get all updates for everything, only to a specific product updates.

[olalid]

Hint btw, you do not need both ProductUpdate and ChargerUpdate. ProductUpdate is sufficient.

[Newan]

ok thanks. you send it like:

self.sr_connection.send("SubscribeWithCurrentState", [id, True])

it the seond part an array or how can i translat it?

can i send it in JSON
{ id: "4711"}

or how?

[olalid]

In the lib we use (https://github.com/mandrewcito/signalrcore) this is a list of all arguments that should be passed to the method (i.e. SubscribeWithCurrentState in this case). So I would suggest you read the documentation for the lib you are using to find out how to pass a list of arguments. The 2 arguments is supposed to be "product serial number" and True, id is just the variable name and is not part of what needs to be passed to the method.

[Newan]

Hi, thank you for the advice to rtfm ☺️, but I may have expressed myself ambiguously. I understood how to use signalr, but I miss a documentation about the commands that can be used for the easee API. Can you give me a hint on where to find those commands?

The NodeJS script runs now and work:

const signalR = require("@microsoft/signalr");

let loginToken = "<authToken>";
let connection = new signalR.HubConnectionBuilder()
    .withUrl("https://api.easee.cloud/hubs/chargers", { accessTokenFactory: () => loginToken })
    .build();

connection.on("ProductUpdate", data => {
    console.log("ProductUpdae");
    console.log(data);
});
connection.start()
    .then((data) => {
          // Here is my PROBLEM?
          connection.send("SubscribeWithCurrentState", "<SerialId>", true).then((data) => {
            console.log(data);
          });
    });

[olalid]

The only info about signalr that I know of exists is this: https://www.notion.so/Developer-documentation-96beaa49e5a64d5fa18d9c801a7dfc28 The command you have just sent is the only existing command over signalr as far as I know. So you listen for updates over signalr, and use the REST API for control. And the REST API you can find here: https://api.easee.cloud/index.html