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Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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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.

== Summary ==
The Waveshare CM4-DISP-BASE-7A-BOX is an all-in-one kit featuring a 7-inch touch screen, aluminum case, and 5 MP camera, designed for the Raspberry Pi Compute Module 4. It provides four USB 2.0 ports, isolated I2C, GPIO, and RS485/RS232 interfaces, and accepts a 7–36 V DC power supply.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL21225 WSAL21225 – 7″ Touch Screen All-In-One Kit Designed for Raspberry Pi CM4, 5MP Camera, Aluminum Case]
* [https://shop.jw-tech.eu/p/WSAL21606 WSAL21606 – 7″ Touch Screen All-In-One Kit Designed for Raspberry Pi CM4, 5MP Camera, Aluminum Case]

== Technical overview ==
* CM4 connector compatible with all Compute Module 4 variants
* DC power input: 7–36 V; a 24 W or higher power supply is recommended
* Four USB 2.0 ports for connecting various USB devices
* HDMI output supports 4K at 30 fps
* RJ45 Gigabit Ethernet supports 10/100/1000 Mbps
* Isolated I2C, GPIO, and RS485/RS232 interfaces are provided
* DSI display connector for the 7-inch panel (800×480)
* CSI connector for the integrated 5 MP camera
* M.2 M-key connector for NVMe SSDs or PCIe communication modules
* Fan connector with speed control and monitoring via I2C
* RTC battery connector supports a CR1220 button cell

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
dtparam=audio=on
dtoverlay=audremap,pins_18_19
audio_pwm_mode=2
disable_audio_dither=1
dtparam=i2c_arm=on
dtoverlay=i2c-rtc,pcf85063a
sudo hwclock -w
sudo hwclock -s
sudo hwclock --set --date="9/8/2021 16:45:05
sudo hwclock -r
sudo hwclock --verbose
dtoverlay=i2c-fan,emc2301,midtemp=45000,maxtemp=65000
dtoverlay=vc4-kms-dsi-7inch,dsi0
libcamera-hello -t 0
libcamera-hello --list-cameras
libcamera-hello --camera 0
libcamera-jpeg -o test.jpg
dtoverlay=uart3
dtoverlay=uart5
ls /dev/ttyAMA*
</syntaxhighlight>

== Notes and version constraints ==
* Do not plug or unplug any device other than USB and HDMI while powered on.
* When replacing the fan, verify its voltage before powering on.
* The USB slave port is only for burning images and cannot be used as an OTG interface.
* Without at least a 12 V / 1 A power supply, issues such as automatic shutdown or clock throttling may occur.
* PoE is not supported.
* The touch screen requires a driver to operate.
* Connect the fan before powering on the board; connecting it after power-on can damage the chip.

== Source and revision record ==
* [https://www.waveshare.com/wiki/CM4-DISP-BASE-7A-BOX CM4-DISP-BASE-7A-BOX - Waveshare Wiki]
* Source revision: 90500
* Captured: 2026-09-03T02:37:02+00:00
* SHA-256: <code>ed0c141d70a34109ad3e22efc4240727e2180283778bae7cb114fb893c4e9fe3</code>

WSAL21225 – CM4-DISP-BASE-7A-BOX/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex