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Green rectangular circuit board with 40-pin header and multiple ports

WaveShare

WaveShare BIGTREETECH Pi4B Adapter V1.0 Carrier Board 40-pin

SKU CH-Y8H4-E2J2G

Carrier board matches Raspberry Pi 4B mounting and adds Gigabit Ethernet, dual HDMI, CSI, CAM and USB ESD protection for CM4 modules

  • CPU TypeOther
  • Uses Raspberry Pi 4B outline with matching mounting holes
  • Gigabit Ethernet plus dual HDMI, CAM and CSI interfaces
  • ESD protection on USB and network ports plus 40-pin header
  • Type-C writes CM4 eMMC and powers the whole board
  • Reserved 5 V connector for a CM4 cooling fan

Carrier Board for CM4 and CB1 Modules

This adapter board matches the Raspberry Pi 4B outline and mounting holes while supporting various Compute Module 4 versions and the CB1 module. It provides a 40-pin header with standard Raspberry Pi functions and adds Gigabit Ethernet, dual HDMI outputs, camera and CSI connectors. The board is designed for makers integrating a CM4 into custom projects such as Voron 3D printers running Klipper.

Interface Limits on the Carrier

The board exposes a Gigabit Ethernet port, two HDMI interfaces and USB connections with ESD protection, but it does not add any additional high-speed lanes beyond what the CM4 module itself provides. A Type-C connector handles both eMMC flashing and system power input, while a reserved 5V header allows an external fan connection. Builders needing extra PCIe lanes, additional USB controllers or onboard wireless must look elsewhere.

40-Pin Header Determines Compatibility

The double-row 40-pin header replicates the Raspberry Pi GPIO layout, so any HAT or peripheral designed for that pinout will connect mechanically and electrically. If a project requires a different pin count, spacing or voltage level, this carrier board will not fit without an adapter. Verify the peripheral’s pinout matches the standard 40-pin Raspberry Pi arrangement before purchase.

Highlights

  • Uses Raspberry Pi 4B outline with matching mounting holes
  • Gigabit Ethernet plus dual HDMI, CAM and CSI interfaces
  • ESD protection on USB and network ports plus 40-pin header
  • Type-C writes CM4 eMMC and powers the whole board
  • Reserved 5 V connector for a CM4 cooling fan

Specifications

CPU TypeOther

Questions about this item

Should I pick the V1.0 or V1.1 control board for my Voron build?

The adapter supports Octopus V1.1 and SKR Mini E3 V3.0 control boards; choose the board that matches your printer's firmware and stepper-driver requirements.

What does the Gigabit Ethernet port actually deliver when the CM4 is installed?

It provides a wired 1 Gb/s network link for fast Klipper communication and file transfers, limited only by the CM4's internal throughput.

How does the Type-C connector limit power and data for the CM4?

The Type-C port flashes eMMC CM4 modules and powers the entire carrier, so a single 5 V supply runs the compute module and attached peripherals.

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