Improve string representations for device objects
Improve string representations for device objects

unikmhz/npui,hermes-jr/npui,hermes-jr/npui,unikmhz/npui,annndrey/npui-unik,unikmhz/npui,unikmhz/npui,hermes-jr/npui,nikitos/npui,nikitos/npui,annndrey/npui-unik,nikitos/npui,annndrey/npui-unik,hermes-jr/npui,nikitos/npui,annndrey/npui-unik