Where is Dimmer (Gen 1) | NZW31 device handler?

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#1

I have an old NZW31 in-wall dimmer (1 gen).
I could not find device handler for it.
Thats the thing description:

But there are no link to device handler
Also, what is the difference NZW31 vs NZW31-sn?

this link does not work for me:
https://inovelli.com/smartthings-device-handlers/
Thank you.

#2

I think you can find the correct handlers in this repo https://github.com/InovelliUSA/SmartThingsInovelli/tree/master/smartapps/z-waveat

#3

Here you go!

https://raw.githubusercontent.com/InovelliUSA/SmartThingsInovelli/master/devicetypes/inovelliusa/inovelli-dimmer-nzw31.src/inovelli-dimmer-nzw31.groovy