The WB3S(h238) WiFi Module ROHS is a miniature, 24 x 16 x 2.8 mm size wireless module manufactured by TUYA. It is designed for IoT applications, with compact design, low power consumption, and wide voltage range. It has a 2.4 GHz Wi-Fi 802.11b/g/n protocol, along with built-in antenna, and supports the UART, I2C, SPI, PWM, and ADC communication protocols. It has an external RAM and runs with secure boot, network encryption, and secure storage, making it an ideal choice for an IoT application.