Bluetooth Low Energy module, bluetooth transmitter, Voltage controlled - tatanh1983/conchodom GitHub Wiki

The main highlight of the NINA-B4 series is Bluetooth’s new direction finding feature, a key component of the Bluetooth v5.1 specification that brings the benefits of high precision positioning to indoor applications. NINA-B4 is the first u blox module designed to act as both a transmitter and a receiver in angle of arrival (AoA) and angle of departure (AoD) direction finding and indoor positioning applications.

https://www.futureelectronics.com/npi/u-blox-nina-b4-bluetooth-low-energy-module