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WSAL21225 – CM4-DISP-BASE-7A-BOX/en

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Version vom 6. September 2026, 00:31 Uhr von JWTechPublisher (Diskussion | Beiträge) (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

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:  

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*

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

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