Module Fan v1.1 is a cooling module designed for the M5Stack stacking system. It integrates an STM32 microcontroller and uses the I2C protocol for control. The module supports reading and controlling the fan speed and includes a stall protection feature. It is primarily used for cooling in stacking systems, effectively improving the system's heat dissipation performance. It is suitable for embedded devices, smart hardware, and other applications that require thermal management.