BT840 Overview
BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.10 Aug. 2018 BluNor BT840F is a powerful, highly flexible, ultra low power Bluetooth Low Energy (BLE) using Nordic nRF52840 SoC. With an ARM CortexTM M4F MCU, available 1MB flash, 256KB RAM, embedded 2.4GHz multiprotocol transceiver, and an integrated PCB trace antenna or u.FL connector for an external antenna.