OKY3369-3 is a Module manufactured by OKYSTAR that supports communication protocols such as Bluetooth, WiFi, I2C, SPI and UART. It is based on the ESP32 chipset and has a 5-V power supply input. It also supports addressable digital I/O, SPI, I2C, UART, A/D conversion functions, an internal 3.3 V regulator, and integrates a wide range of peripherals. Additionally, it is designed to be low-cost and has ultra-low power consumption.