Overlay Rpi Firmware: disable Wifi, Bluetooth and easy Shutdown Button

Rpi's Firmware has many posibilities to configure changing /boot/config.txt file

Usefull overlays:

Disable bluetooth:

Name: disable-bt
	Info: Disable onboard Bluetooth on Pi 3B, 3B+, 3A+, 4B and Zero W, restoring
	UART0/ttyAMA0 over GPIOs 14 & 15.
	N.B. To disable the systemd service that initialises the modem so it
	doesn't use the UART, use 'sudo systemctl disable hciuart'.
	Load: dtoverlay=disable-bt
	Params: <None>

Disable wifi:

Name: disable-wifi
	Info: Disable onboard WLAN on Pi 3B, 3B+, 3A+, 4B and Zero W.
	Load: dtoverlay=disable-wifi
	Params: <None>

Safe shutdown button:

Clinton

Hey Shane,
No this won’t but if you wire the button to GPIO3 and add
dtoverlay=gpio-shutdown
to /boot/config.txt it will give you a safe shutdown and start up again.

You can find out more about it in the overlay readme search for shutdown and you will find it.
@Josh Told me about this just after I finished writing the tutorial.

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Tested in my Rpi4: NOT WORK !!!

other recipe:

Tentsing this:

Include in /boot/config.txt and reboot

dtoverlay=gpio-shutdown,gpio_pin=3

NOT WORK !!

seems that nt work with GPIO_3 = SCL

Changing to GPI #17

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Include into /boot/config.txt and reboot

dtoverlay=gpio-shutdown,gpio_pin=17

YES, it's WORKS, can shutdown rpi4 with switch from GPIO#17 -- GND

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Ref:

https://github.com/raspberrypi/firmware/blob/master/boot/overlays/README