Every feature added to bluetooth since version 2.1 has been optional, so you can take any BT 2.1 chip and validly claim it is a BT 5.0 chip (it just lacks all t

Every feature added to bluetooth since version 2.1 has been optional, so you can take any BT 2.1 chip and validly claim it is a BT 5.0 chip (it just lacks all the optional features). source: i work on bluetooth