Ultra-low power for battery powered applications Firmware configurable transmit power: 0dBm to +12dBm Hardware interfaces: UART and SPI Slave Supports SoftAP and infrastructure networking modes RF pad for external antenna User programmable GPIO & ADCs Real-time clock for time-stamping, auto-sleep, and auto-wakeup modes Run directly from batteries or regulated power supplies Configuration over serial or wireless interface using simple ASCII commands Over the air firmware upgrade Secure Wi-Fi authentication schemes (WEP/WPA/WPA2) Full onboard TCP/IP stack (no external drivers required)