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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
<br />
== Summary ==<br />
The Game HAT is a Raspberry Pi expansion board integrating a 3.5-inch IPS display (480×320), a joystick with A/B/X/Y buttons and a battery connection. It enables portable game console operation via RetroPie or Recalbox.<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL15154 WSAL15154 – Game HAT for Raspberry Pi]<br />
<br />
== Technical overview ==<br />
* Compatible with Raspberry Pi A+, B+, 2B, 3B, 3B+ and 4B; an additional HDMI cable is required for Pi Zero/Zero W.<br />
* Integrated charging circuitry for an 18650 lithium battery (not included) with a charge indicator.<br />
* Onboard speaker and headphone jack for emulation audio output.<br />
* Direct HDMI connection on the board to link with the integrated display.<br />
* Joystick buttons are wired through GPIO pins: UP(BCM5), DOWN(BCM6), LEFT(BCM13), RIGHT(BCM19), A(BCM26), B(BCM12), X(BCM16), Y(BCM20), START(BCM21), SELECT(BCM4).<br />
* Under RetroPie the driver can be installed manually; steps differ depending on image version (v4.7 or older).<br />
* Under Recalbox, set controllers.gpio.enabled=1 in /recalbox/share/system/recalbox.conf and adjust the GPIO arguments.<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
hdmi_force_hotplug=1<br />
hdmi_group=2<br />
hdmi_mode=87<br />
hdmi_cvt=640 480 60 1 0 0 0<br />
cd RetroPie-Setup/<br />
sudo ./retropie_setup.sh<br />
sudo nano /etc/modprobe.d/mk_arcade_joystick_rpi.conf<br />
options mk_arcade_joystick_rpi map=5 gpio=5,6,13,19,21,4,26,12,23,20,16,18<br />
sudo tar xzvf /boot/Game-HAT-*.tar.gz<br />
cd Game-HAT/<br />
sudo ./Game-HAT<br />
mount -o remount,rw /<br />
mount -o remount,rw /boot<br />
nano /recalbox/share/system/recalbox.conf<br />
</syntaxhighlight><br />
<br />
== Notes and version constraints ==<br />
* The battery must be mounted with correct polarity; reverse connection will damage the charging circuit.<br />
* If the battery is low, the Raspberry Pi cannot start; connect a 5V/2A power supply to the Power interface for charging.<br />
* You can play while charging, but disconnecting the power supply causes the Raspberry Pi to reboot automatically.<br />
* Voltages above 7V may damage the charging circuit; recommended adapter: 5V/2A.<br />
* For manual driver installation under RetroPie, the board must be connected to the network, otherwise installation fails.<br />
* Exact configuration depends heavily on the specific OS image version used; human confirmation is required before execution.<br />
<br />
== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/Game_HAT Game HAT - Waveshare Wiki]<br />
* Source revision: 72156<br />
* Captured: 2026-08-31T02:41:30+00:00<br />
* SHA-256: <code>dee0c910e89845da6315413820b5ab385473f893387542f0b9826dd9facee83d</code></div>JWTechPublisher