Implementing Bluetooth features to Print on a bluetooth printer in Xamarin Forms App

I'm trying to avail Bluetooth features in my Xamarin Forms App to Print on a bluetooth printer but can't get it working.
Even not able to search devices and pair.
I tried below two plugins but none of them works for me.

1. https://github.com/aritchie/bluetoothle
2. https://github.com/xabre/xamarin-bluetooth-le

I tried this example as well:

https://julianocustodio.com/2017/12/07/bluetooth/amp/?__twitter_impression=true

Does anyone have working example?
Any help is much appreciated.

Thanks