| Type RF Family/Standard Protocol Modulation Frequency Data Rate (Max) Power - Output Sensitivity Memory Size Serial Interfaces GPIO Voltage - Supply Current - Receiving | TxRx + MCU 802.15.4 Zigbee® - 2.4GHz 250kbps 4.5dBm -97dBm 256kB Flash, 8kB RAM SPI, UART 21 2 V ~ 3.6 V 24mA 29mA |