Redukcia USB kluc-Smartfon s On-The- Go funkciou

https://www.youtube.com/watch?v=s54MKrK9DZk

https://en.wikipedia.org/wiki/USB_On-The-Go

https://hackernoon.com/10-creative-ways-to-use-otg-adapter-with-smartphones-27a86082cc6

https://www.youtube.com/watch?v=DqMPtQcqvlk

https://www.makeuseof.com/tag/what-is-usb-otg-5-cool-ways-use-android/