Today, Coin announced that it will offer up an Arduino Bluetooth Low Energy module that's designed to be small and easy to integrate into hardware hacks and products of all kinds.

Despite the name, Bluetooth Low Energy (BLE) has very little to do with the original Bluetooth, other than its use of the same 2.4 GHz frequencies. This is where [Dmitry] got the idea to use a 2.4 … ...

The Arduino Nano 33 IOT has an ESP32 onboard (WiFi + Bluetooth) and crypto onboard with the uBlox NINA-W10. I guess the BLE versions dissipate less power than the ESP32/uBlox NINA-W10 version ...