Description The Module Fan v1.1 is a Fan Module for the M5Stack stacking system. Built with an STM32F030F4P6 microcontroller, the Module Fan v1.1 uses I2C control to read fan speed, adjust PWM output, and improve thermal performance in stacked embedded devices. This Fan Module is a practical cooling layer for stack projects that need software-controlled airflow. This Fan Module is designed for cooling M5Stack devices, smart hardware, and compact embedded systems that need controlled airflow. The Module Fan v1.1 supports stall protection and reaches 11500 RPM +/-10%, making the Fan Module suitable for projects where heat management and programmable fan speed are both important. Notice: If the fan is stalled by foreign objects, it can resume operation automatically after the obstruction is removed. Prolonged stalling may damage the fan or cause burnout, so blockages should be cleared promptly and the fan should be kept operating normally. The air intake of the Module Fan v1.1 is located at the bottom of the module. For best cooling performance, stack the Fan Module on top of the module that requires cooling. Features Module Fan v1.1 cooling module for the M5Stack stacking system STM32F030F4P6 microcontroller inside the Fan Module I2C protocol control at address 0x18 Fan speed reading and PWM speed control Stall protection function for blocked-fan conditions 11500 RPM +/-10% fan speed and 1.23 CFM maximum airflow Development support for UiFlow1, UiFlow2, and Arduino IDE Specifications MCU STM32F030F4P6 Communication I2C, address 0x18 Operating Voltage 5V Noise Test Ambient noise 40.8dB; PWM 20%: 48.6dB; PWM 60%: 64.5dB; PWM 100%: 70.6dB Operating Power PWM 20%: DC [email protected]; PWM 60%: DC [email protected]; PWM 100%: DC [email protected] Standby Power DC [email protected] Fan Speed 11500 RPM +/-10% Maximum Airflow 1.23 CFM Fan Speed Control Supports reading fan speed and PWM speed control Stall Protection Supports stall protection function Operating Temperature 0 to 40 degrees C Product Size 54.0 x 54.0 x 13.1mm Product Weight 14.7g Package Size 95 x 184 x 15.7mm Package Weight 28.3g Applications Cooling for M5Stack stacked devices with the Module Fan v1.1 Fan Module Smart hardware prototypes that need programmable airflow from a Fan Module Embedded devices where the Fan Module can read speed and adjust PWM output Thermal management for compact controller stacks Product List 1 x Module Fan v1.1 Other Content The fan cable uses red for VCC, black for GND, yellow for FG_OUT, and blue for PWM. FG_OUT is the fan speed waveform output pin, and PWM is the fan speed control pin. On the STM32F030F4P6, PA6 maps to FanCtr, PA7 maps to FG_OUT, PA9 maps to SCL, and PA10 maps to SDA. On the M5-Bus, the Module Fan v1.1 uses SDA on pin 17 and SCL on pin 18 for I2C communication. Compared with the earlier Module Fan, the Module Fan v1.1 adds I2C communication, speed feedback, and speed control. The Fan Module also increases the rated speed from 7500 RPM +/-10% to 11500 RPM +/-10%. Resources Module Fan v1.1 product document Module Fan v1.1 schematic PDF Module Fan v1.1 model size PDF Module Fan v1.1 fan datasheet PDF Module Fan v1.1 Arduino development guide Module Fan v1.1 Arduino library on GitHub Module Fan v1.1 UiFlow2 MicroPython documentation Module Fan v1.1 internal firmware repository Module Fan v1.1 I2C protocol PDF M5Stack Module Fan comparison document FAQ What is the Module Fan v1.1 used for? The Module Fan v1.1 is used to cool M5Stack stacked systems and other compact embedded devices that need controlled airflow. Can the Fan Module control speed? Yes. The Fan Module supports fan speed reading and PWM speed control through I2C communication. What should I do if the fan is blocked? Remove the obstruction as soon as possible. The Module Fan v1.1 can resume after the obstruction is removed, but long stalls may damage the fan. Where should the Module Fan v1.1 Fan Module be installed? Because the air intake is on the bottom, place the Module Fan v1.1 Fan Module above the module that needs cooling for better airflow.
