Some websites indicate the need to obtain Bluetooth certification.
I am aware of the high cost of registering a product when rebranding, even when incorporating a product that already has Bluetooth certification.
I would expect that if one does not use the Bluetooth patent and logo, one does not need to obtain Bluetooth certification, but I do not know how to avoid using the Bluetooth patent.
Is the Bluetooth patent included in the hardware or in a specific library?
Bluetooth SIG : Bluetooth Qualification Process Overview
Do I Need to Qualify?