The power/earth pins are not GPIO's. They are fixed at 5V, 3.3V or 0V
and can't be turned on and off.
The GPIO's can be turned off and on but don't have much current capacity
so extra circuitry is usually required. Usually a transistor and a
resistor or 2. This solution will typically have 3 connections, one to
3.3V, one to 0V and one to a GPIO. The GPIO usually connects to the base
of the transistor which works like a switch.
So once you decide on your circuitry and pick the GPIO you need to load
the gpio-fan overlay. This will turn your fan on if it gets hot.
Code:
--------------------
Name: gpio-fan
Info: Configure a GPIO pin to control a cooling fan.
Load: dtoverlay=gpio-fan,<param>=<val>
Params: gpiopin GPIO used to control the fan (default 12)
temp Temperature at which the fan switches on, in
millicelcius (default 55000)
--------------------
------------------------------------------------------------------------
Greg Erskine's Profile: http://forums.slimdevices.com/member.php?userid=7403
View this thread: http://forums.slimdevices.com/showthread.php?t=112946
_______________________________________________
plugins mailing list
[email protected]
http://lists.slimdevices.com/mailman/listinfo/plugins
