Follow up the previous blog to discuss how GPIO reads the fan tach signal

4, configure the GPIO pin as the input mode to prepare to read Tach signals. This can be achieved by using appropriate programming languages and libraries. For example, you can use the RPi.GPIO library for Raspberry PI.

5. Read the status of GPIO pin to obtain Tach signal. Depending on the programming language and library you choose, you can use the appropriate function or method to read the GPIO state. If the status changes, the fan speed changes.

6, please note that the specific implementation details may vary depending on the hardware platform, fan, and programming language used. Be sure to refer to the relevant hardware and programming documentation for accurate configuration and usage.

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