[Feature Request]: PWM Fan control?

[gjelsoe]

Would it be an idea to add PWM control of a fan ?

Devices from Radiomaster like Bandit and Bandit Nano do have a fan connected to the ESP32
and at the moment it can be turned on or off.

So a PWM could be a middle ground if full speed is not necessary but some cooling is wanted.

A setting with LoRa config (FAN speed) could be added where a value between 0-100 (%) can be set.

[gjelsoe]

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