Datasheet

Extras!

Tactile switch as power button

Its a good idea to safely turn off your Pi with a good sudo shutdown -h now but that often means pulling out a

keyboard or connecting to the console. With our kernel we added a cool module that will let you turn any GPIO into a

power button. Since there's a couple of tactile switches right there on the front, lets turn one into a power button. Press

once to properly turn off the pi, press again to start it up. Isn't that nice?

We'll be using GPIO #23, the left-most button on a PiTFT 2.8", on the 2.4" HAT, #16 is a good choice since its on a

tactile button. But, you can use any GPIO you want, really!

You will have to grab a pack of slim tactile switches or otherwise solder in a button

Add rpi_power_switch to /etc/modules and save

Now create a new conf file or edit our existing one with

sudo nano /etc/modprobe.d/adafruit.conf

and enter in the line

options rpi_power_switch gpio_pin=23 mode=0

Of course, change the gpio_pin setting to some other # if you wish. mode=0 means its a pushbutton

not

a switch. If

you happen to install an on/off switch, use mode=1

To make it active immediately run sudo modprobe rpi_power_switch

https://learn.adafruit.com/adafruit-pitft-28-inch-resistive-touchscreen-display-raspberry-

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