Correct way to find device id

[KidA001]

I modified Solar.js to show the state-of-charge as I often wanted to know what state my charge controller is in. What I don't love is the hardcoded device ID for my Solar Charge Controller N/${portalId}/solarcharger/289/State. Is there a way for me to programmatically identify or see a list of available solar charge controllers I can subscribe to?

Sorry if this isn't the place for the question. I posted on the Victron Community forums under modifications but didn't receive any answers.

Modified code is below:

const solarChargerStateDisplayName = {
  0: 'Off',
  2: 'Fault',
  3: 'Bulk',
  4: 'Absorption',
  5: 'Float',
  6: 'Storage',
  7: 'Equalize',
}

const getTopics = portalId => {
  return {
    power: `N/${portalId}/system/0/Dc/Pv/Power`,
    current: `N/${portalId}/system/0/Dc/Pv/Current`,
    solarChargerState: `N/${portalId}/solarcharger/289/State`
  }
}

const Solar = ({ current, power, solarChargerState }) => {
  return (
    <HeaderView icon={require("../../../images/icons/icon_solar.svg")} title="Solar">
      <MetricValues>
        <NumericValue value={current} unit="A" precision={1} />
        <NumericValue value={power} unit="W" />
        <span class='value'>{solarChargerStateDisplayName[solarChargerState]}</span>
      </MetricValues>
    </HeaderView>
  )
}

...

(p.s. I really love working on this application, you all have done a great job coding it. I've made some slight modifications to the dashboard so that I can display my Hot Tub temperature and turn it on and off :) )

[thlassche]

Without checking it thoroughly I'd say if you have only one solar controller you can swap the instance number with a path level wildcard, a '+'-sign, so: N/${portalId}/solarcharger/+/State

[mpvader]

And FYI, there is a fix planned for Venus OS to make those IDs static. Basically, Venus OS will reserve an ID for a certain MPPT serial number, and re-use that.

Instead of the method used now that can (only sometimes) cause renumberings

[thlassche]

And some more context on how we handle it elsewhere in the app, see this source code: src/app/mqtt/victron/GetInverterChargerDeviceInstance.js

[KidA001]

@thlassche @mpvader thanks for the feedback. I tried the MQTT + wildcard before and it throws an error, but I think what you're doing in GetInverterChargerDeviceInstance.js might help. I'll see if I can replicate another object to do something similar for my charge controller.

@mpvader I would love if Venus moves to static/UUID's for devices. I've had my device-id change once before on me which is why I wanted something more reliable. Thanks