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added information about USB-LAN-adapter

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Martin Sebald 5 years ago
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      sml/README.md

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sml/README.md

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# Power Meter with SML
Read data from a power meter (eHZ = Elektronischer Haushaltszähler) using Smart Message Language (SML).
First of all you need is a eHZ (Elektronischer Haushaltszähler) and an IrDA USB dongle like described [here](https://wiki.volkszaehler.org/hardware/controllers/ir-schreib-lesekopf). I got mine from Udo ([Volkszaehler](http://volkszaehler.org)) some time ago but it looks like he is not directly selling these anymore. What I found is [this link](https://s.sebald.com/flmui) to a shop selling the same dongles on Amazon.
First of all you need is a eHZ (Elektronischer Haushaltszähler) and an IrDA USB dongle like described [here](https://wiki.volkszaehler.org/hardware/controllers/ir-schreib-lesekopf). I got mine from Udo ([Volkszaehler](http://volkszaehler.org)) some time ago but it looks like he is not directly selling these anymore. What I found is [this link](https://s.sebald.com/flmui) to a shop selling the same dongles on Amazon. If your eHZ is not next to your openHAB device you might want to extend the USB cable using a [USB over LAN extender](https://s.sebald.com/dzsc7), which works pretty good for me.
I used several information from the openHAB community, mainly from [this topic](https://community.openhab.org/t/using-a-power-meter-sml-with-openhab/21923/1).

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