It is not plug&play, need some linux modification to work, like install display driver, keyboard configuration and more

For this to work you need to have a bit more experience with Linux, check the attached file, there are some files that need to be placed in the right place, I will try to make some instructions for setting it up, if you have any questions feel free to ask, I will be happy to answer.

Updated Enhanced 2025 version - (Almost full keyboard)

Features:

• 2.8" IPS 320x240 display ST7789
• sound working simple amplifier mono speaker
• optional USB-A for easy work with PI zero, 2 wires are required to test points D+,D-
• ideal for terminal apps
• designed to run from powerbank
• integrated simple power supply
• GPIO keyboard 7x10 matrix with customizable python driver
• comfortable 1N switch force keyboard

            For X GUI apps you can use USB mouse
  

FOR ADVANCED USERS

Tested RPI Boards:

• RPI ZERO W
• RPI ZERO W 2 -> BEST
• RPI 4 (fit only without 18650 battery holder, need GPIO extension)
• RPI 5 not supported

     RASPBERRY PI IS NOT INCLUDED
  

No extra manufacturing, front panel is made in PCB factory + mainboard

Keeping my KISS philosophy make it stupid simple = one order = one device

YOU RECEIVE:

• main board with soldered 40pin female header for Raspberry pi
• buttons soldered
• display soldered
• front panel cover

Some install steps

• copy gamepi20.dtbo to overlays on Boot drive

• add to config.txt

     [all]
     #hdmi_cvt=320 240 60 1 0 0 0
     #hdmi_group=2
     #hdmi_mode=1
     #hdmi_mode=87
     dtoverlay=pwm
     hdmi_force_hotplug=1
     dtparam=audio=on
     start_x=0
     dtoverlay=audremap,pins_18
     dtoverlay=gamepi20
     boot_delay=1
     disable_splash=1
     enable_uart=0
     disable this !!!!!!!!!!!!!!!!
     #dtoverlay=vc4-kms-v3d
  

• add to cmdline.txt

     fbcon=map:10 fbcon=font:VGA8x8
  

• add to rc.local

     # Print the IP address
     _IP=$(hostname -I) || true
     if [ "$_IP" ]; then
       printf "My IP address is %s\n" "$_IP"
     fi
  
     sudo setfont /usr/share/consolefonts/Lat2-Terminus12x6.psf.gz &
     #sudo fbcp &
     sudo python3 /home/pi/gpiokeyboard/gpiokeyboard.py &
     exit 0
  

• install sudo apt-get install python3-evdev

• copy keyboard driver to /home/pi/gpiokeyboard/gpiokeyboard.py

• in sudo raspi-config set sound output to PCM audio

NOTE

 please carefully read project page before purchase, it is experimental thing

• Project page