| 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 v4.1 Low Energy - 2.4GHz - 0dBm -93dBm 32kB OTP, 84kB ROM, 50kB SRAM I²C, SPI, UART 32 3V 3.7mA 3.4mA |