how to use as a node noob

[stefangweichinger]

Can you help me getting started here?
I am looking for a way to extract temperature values from Varta devices for Prometheus and found your repo.

Can I send user/pwd with the requests? I have to auth at my storage.

I am a node noob, tried this:

> cat my.js 
// Access API Class Object
const battery = energyStorage({
  ip: '192.168.210.13',
  fullRequest: '/cgi/ems_data.js',
  simpleRequest: '/cgi/ems_data.xml',
  paramsRequest: '/cgi/ems_conf.js',
  type: 'v', // Type for VARTA Storage Systems
});

// Request the data from the Battery
await battery.requestSimple();

// Data can now be accessed in raw format, to use the provided methods, parse the data
battery.parse();

> npm install @robinrs/energy-storagejs 

added 7 packages in 250ms

❯ node my.js 
file:///tmp/tmp.TViuWogQFM/my.js:2
const battery = energyStorage({
                ^

ReferenceError: energyStorage is not defined
    at file:///tmp/tmp.TViuWogQFM/my.js:2:17
    at ModuleJob.run (node:internal/modules/esm/module_job:329:25)
    at async onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:644:26)
    at async asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:117:5)

Node.js v22.17.0

could you help out? Thanks for your work ...

[RobinRS]

Hi ✌️,

been a while since I've used that code, as it's running stable in the background for me.

The temperature of the battery was never implemented, but I'm open to doing so at the weekend if ya can wait.

For password authentication, it depends if it's basic auth or if it's the proprietary auth system of vata. Normally, in the same network, it has no auth system active (atleast in my battery)

Best regards
Robin

[stefangweichinger]

I can wait for you trying to read the temperature(s) ;-)

The Varta GUI shows several temperatures .. my customer just wants to track that to pinpoint some issue around the panels not delivering power regularly (and the technician says, the batteries get too warm ... anyway).

Can you give me an example how to run your code? Then I can start playing and figuring out how to pipe the results into Prometheus. Thank you!

[stefangweichinger]

browser: I only get data from the ems_data.js when I login with user/password first.
With curl I try:

curl "http://192.168.210.13/cgi/ems_data.js" -u "user:password"
Zeit = "09.07.2025 08:38:59";`

seems not to work. Just reporting, maybe you have a hint.

I spotted the temperatures in the browser already ;-)

[stefangweichinger]

Just quickly the output of my ems_data.js, might be different from yours as far as I see in the code. Then I will just wait ;-)

Zeit = "09.07.2025 09:15:29";
WR_Data = [0,3819,229,231,230,594,597,595,38,39,38,27,500,0,2,0,"255.255.255.255",-1,14.9,709,355,80,100,100,11,3819,1611711619,1887438340,19385,0,0];
EMETER_Data = [5005,230,232,231,560,560,560,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
NA_Data = [5008,2300,2316,2306,2310,2326,2317,0.9,-1];
Charger_Data = [[0,1,18,36,5062,2514,707,381,119,38,44,31,1273,-32725,
["LG_Neo",7,0,0,5040,242,
  [[-8160,0,0,221,504,242,247,246,246]  ]
]
]
,[1,1,16,36,5026,2527,706,379,119,37,42,31,1273,-32725,
["LG_Neo",7,0,0,5010,256,
  [[-8160,0,0,196,501,256,251,250,250]  ]
]
]
,[2,1,17,36,5038,2523,708,380,119,40,45,34,1273,-32725,
["LG_Neo",7,0,0,5020,246,
  [[-8160,0,0,205,502,245,247,244,245]  ]
]
]
];

I think the temperatures are the last fields as in:

["LG_Neo",7,0,0,5020,246,
  [[-8160,0,0,205,502,245,247,244,245]  ]
----------------------^^^ start here

[stefangweichinger]

Took the effort and built a python-script in the meantime. It seems to be working since an hour or so ;-)