We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green rectangular PCB adapter board with four blue USB ports, silver Ethernet jack, and gold edge connector visible

WaveShare

WaveShare Compute Module 4 to Raspberry Pi 4B Adapter

SKU CH-3RXH-9XT11

Adapter board lets a Compute Module 4 function as a Raspberry Pi 4B with four USB 3.0 ports, Gigabit Ethernet and PoE header for HAT compatibility

  • CPU TypeOther
  • Reproduces Pi 4B form factor using any CM4 module
  • Accepts CM4 Lite and eMMC boards via standard connector
  • Four USB 3.0 ports with USB 2.0 and 1.1 backward compatibility
  • Gigabit Ethernet at 10/100/1000 M speeds onboard
  • PoE header ready for PoE HAT power delivery

WaveShare CM4 to Pi 4B Adapter Board

The WaveShare adapter board converts a Compute Module 4 into a Raspberry Pi 4B form factor. It provides an onboard CM4 connector that accepts both Lite and eMMC module variants. The board replicates the physical layout and connector positions of the standard Pi 4B. It serves as a cost-effective alternative for projects requiring the familiar Pi 4B shape.

Makers Integrating CM4 Into Pi 4B Projects

Developers who already own a Compute Module 4 and need mechanical compatibility with existing Pi 4B HATs will find this board useful. It exposes four USB 3.0 ports and a Gigabit Ethernet jack with PoE header support. Builders who do not have a CM4 module must source one separately, as none is included. Users seeking a complete single-board computer without extra assembly should consider other options.

Onboard Standard CM4 Connector

The defining specification is the onboard standard CM4 connector that mates directly with Compute Module 4 Lite or eMMC boards. This connector carries the processor interface and routes signals to the Pi 4B-compatible headers and ports. Compatibility with the CM4 module generation determines whether the adapter functions at all. No other specification on the board overrides this requirement.

Highlights

  • Reproduces Pi 4B form factor using any CM4 module
  • Accepts CM4 Lite and eMMC boards via standard connector
  • Four USB 3.0 ports with USB 2.0 and 1.1 backward compatibility
  • Gigabit Ethernet at 10/100/1000 M speeds onboard
  • PoE header ready for PoE HAT power delivery

Specifications

CPU TypeOther

Questions about this item

How can I verify the adapter is working after installing a Compute Module 4?

Power the board and confirm the Gigabit Ethernet link lights show a 10 / 100 / 1000 M connection, then check that all four USB 3.0 ports enumerate devices at USB 3.0 speed.

What comes in the box and what must I buy separately?

The adapter board is supplied alone; you must purchase a Compute Module 4 Lite or eMMC version separately to use it.

Which Compute Module 4 version should I choose for this adapter?

Both the Lite and eMMC series boards with the Quad Core Cortex A72 64-bit processor are supported by the onboard standard CM4 connector.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.