[SOLVED] JS after JSON transformation in stateTransformation (and commandTransformation)

Setup, Configuration and Use Items & Sitemaps
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1

Hello,

I am struggling with transformation of a channel, it is probably a small syntax thing.
So I hope someone is able to help my out here.

I have a sitemap with the following line:
Text item=ToonThermostaatCurrentTemp label="Current Temperature [JS(div100.js):%.1f °C]"
Works fine: content of item is divided by 100, and I used it as proof that my JS transformation is working.

Now I would like to add that transformation to a channel (after json transformation), and I tried this:
stateTransformation: JSONPATH:$.currentSetpoint ∩ JS:div100.js

But then I get an error:
2021-04-05 10:41:16.643 [WARN ] [.transform.SingleValueTransformation] - Transformation service JS for pattern div100.js not found!

What I am trying to achieve:
I use a Thing from the http binding to get json from my thermostat. The thermostat setpoint is provided as 2000. I would like to transform that to 20,00 and put it as a setpoint on a sitemap. And yes, It indeed means I need to multiply the number with 100 again when sending the setpoint to the thermostat :slight_smile:

2

What binding are we talking about here?

This means that openHAB thinks that the JS Transformation Service isn’t installed. If you think it is, uninstall it, then re-install it.

1 Like
3

I did un-install and re-install the JS transformation just to be sure but that unfortunately does not solve the problem

4

Where did you put that, how did you put that? I’m thinking about possibly quotemarks, brackets, and encoding here (there is the funny bridge character for example).

5

I placed it in the YAML in the web interface:

UID: http:url:Toon_Thermostaat
label: Toon Thermostaat
thingTypeUID: http:url
configuration:
  authMode: BASIC
  ignoreSSLErrors: false
  baseURL: http://toon.familie-dokter.lan/happ_thermstat
  refresh: 60
  commandMethod: GET
  timeout: 3000
  bufferSize: 2048
channels:
  - id: currentTemp
    channelTypeUID: http:number
    label: Toon Current Temperatuur
    description: ""
    configuration:
      stateExtension: ?action=getThermostatInfo
      stateTransformation: JSONPATH:$.currentTemp
  - id: currentSetpoint
    channelTypeUID: http:number
    label: Toon Current Setpoint
    description: null
    configuration:
      stateExtension: ?action=getThermostatInfo
      stateTransformation: JSONPATH:$.currentSetpoint ∩ JS:div100.js

(there is more channels after these)

I “copied/pasted” the union symbol from the documentation :slight_smile:

6

Try it without the spaces? It may not be obvious if it is searching for a " JS" service.

1 Like
7

That’s it!
That did the trick…

      stateTransformation: JSONPATH:$.currentSetpoint∩JS:div100.js

Thanks!