Adafruit Mini PiTFT Shutdown and Restart Buttons v2
Simple script to use the buttons on the Adafruit Mini PiTFT for safe shutdown and reboot, AND to display system stats on the screen.
Best practice for Python 3.14 now requires scripts to be run in a virtual environment, which broke my previous implementation of directly running the script on startup using rc.local. I did not write this, and the bulk of the original code belongs to Adafruit.
The Stats script was provided via the instructions here: https://learn.adafruit.com/adafruit-mini-pitft-135x240-color-tft-add-on-for-raspberry-pi/python-setup You can change what's displayed by following that tutorial. Alternately, you can follow those instructions to display the console (in which case you'd use only the Buttons script provided here).
The Buttons script will make the first (top) button initiate a safe shutdown, and the second (bottom) button initiate a reboot.
I'm running these on the latest OctoPi with the Mini PiTFT: depending on your specific setup, you may need to tweak things a bit. Stats display and buttons are separated into separate scripts that are run as system services: you can use either or both scripts.
Copy PiTFT_Buttons.py and/or PiTFT_Stats.py to /home/pi/
sudo raspi-config
Interface Options > Enable SPI
Optional: to avoid possible permission errors on /dev/spidev*, add pi to the spi and gpio groups: sudo usermod -aG spi,gpio pi
Some of these commands may be redundant or unnecessary in your specific setup, but I ran them all to stamp out errors about missing packages
python3 -m venv /home/pi/PiTFT_Env
source /home/pi/PiTFT_Env/bin/activate
pip install --upgrade pip
python3 -m pip install --upgrade Pillow
pip install --upgrade spidev
pip install pillow
pip install psutil
pip install circup
pip install adafruit-blinka
pip install adafruit-python-shell
pip install adafruit-circuitpython-rgb-display
pip install adafruit_rgb_display
pip install adafruit-circuitpython-digitalio
deactivate
sudo apt update
sudo apt install -y python3-dev python3-pil python3-pip python3-setuptools python3-numpy libopenjp2-7 libtiff5 libatlas-base-dev fonts-dejavu-core fonts-dejavu pillow
sudo reboot
Test the scripts in the virtual environment before adding them as a service
source /home/pi/PiTFT_Env/bin/activate
python /home/pi/PiTFT_Stats.py &
python /home/pi/PiTFT_Buttons.py &
This will run both scripts in the background until next reboot. Ensure that stats are showing on the screen and that the reboot button works. If all is well, proceed to create the services that will ensure they run with each boot with adequate permissions
sudo nano /etc/systemd/system/PiTFT-buttons.service
Paste this into PiTFT-buttons.service: [code][Unit] Description=PiTFT Buttons (Shutdown/Reboot) After=multi-user.target
[Service] Type=simple User=root ExecStart=/home/pi/PiTFT_Env/bin/python /home/pi/PiTFT_Buttons.py Restart=always RestartSec=2
[Install] WantedBy=multi-user.target[/code]
Write Out and Exit, saving changes
sudo nano /etc/systemd/system/PiTFT-stats.service
Paste this into PiTFT-stats.service: [code][Unit] Description=PiTFT Stats Display After=network.target
[Service] Type=simple User=root WorkingDirectory=/home/pi ExecStartPre=/bin/sleep 5 ExecStart=/home/pi/PiTFT_Env/bin/python /home/pi/PiTFT_Stats.py Restart=always RestartSec=5 KillSignal=SIGTERM KillMode=process TimeoutStopSec=10
[Install] WantedBy=multi-user.target[/code]
Write Out and Exit, saving changes
sudo systemctl edit octoprint.service
Paste this into octoprint.service: [code][Service] TimeoutStopSec=10 [/code] Write Out and Exit, saving changes
sudo systemctl daemon-reexec sudo systemctl daemon-reload
sudo systemctl enable PiTFT-buttons.service sudo systemctl enable PiTFT-stats.service
sudo systemctl start PiTFT-buttons.service sudo systemctl start PiTFT-stats.service
sudo systemctl status PiTFT-buttons.service sudo systemctl status PiTFT-stats.service
journalctl -u PiTFT-buttons.service -f journalctl -u PiTFT-stats.service -f