[SOLVED] Using JavaScript to transform data

Setup, Configuration and Use Scripts & Rules
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1

I’m receiving data from my Sunny Boy solarinverter through modus-tcp.
Now I would like to transform those data with javascript.

I installed the ‘JavaScript Transformation’ with Paper-UI. The javascript files are stored in /etc/openhab2/transform.

My things-file with the modbus poller:

Bridge modbus:tcp:SMAinverter [ host="192.168.178.130", port=502, id=3 ] {

// SMA SunnyBoy Device Type 30775 Actual SolarPower
     Bridge poller sma30775 [ start=30775, length=4, refresh=30000, type="input", readTransform="JS(smalimit.js)" ] {
        Thing data SolarPower [ readStart="30775", readValueType="int32" ]
     }

// SMA SunnyBoy Device Type 30517 DC Day Yield
     Bridge poller sma30517 [ start=30517, length=4, refresh=30000, type="input", readTransform="JS(divide1000.js)" ] {
        Thing data DayYield [ readStart="30517", readValueType="uint64" ]
     }
}

my JavaScriptfile divide1000.js

(function(i) {
    return parseFloat(i) / 1000;
})(input)

my JavaScript file smalimit.js

(function(i) {
    if(i < 0) return "UNDEF";
    return parseFloat(i) / 1000;
})(input)

I already restarted the services with the karaf-console.
Unfortunately the transformation proces still doesn’t work. What am I doing wrong ?

2

I think, I already found the problem. The transform statement has to come with the data instead of the poller. :wink:

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