If you have a custom PCB design and you'd like to add a little Bluetooth® Low Energy, this module is ultra-compact and easy to use. It contains a Nordic nRF52832 chip that comes integrated with BLE radio as well as most of the supporting circuitry and even a chip antenna. The whole thing comes with FCC, CE, and TELEC certifications. https://elecena.pl/product/17502188/nrf52832-bluetooth-low-energy-module 2021-04-07 https://elecena.pl/product/17502188/nrf52832-bluetooth-low-energy-module 2021-12-12