| Type RF Family/Standard Protocol Modulation Frequency Data Rate (Max) Power - Output Sensitivity Memory Size Serial Interfaces GPIO Voltage - Supply Current - Receiving | TxRx + MCU Bluetooth Bluetooth v4.0 Low Energy - 2.4GHz 2Mbps 0dBm -94dBm 128kB Flash, 8kB RAM I²C, SPI, UART 23 2 V ~ 3.6 V 17.9mA 18.2mA |