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Green rectangular circuit board with CM4 socket, four USB ports, RJ45 jack, audio jack, PoE header and GPIO pins

WaveShare

WaveShare Compute Module 4 to Pi 3B/3B+ Adapter

SKU CH-SY2V-X8BBK

Adapter board that accepts a Compute Module 4 to recreate Raspberry Pi 3B/3B+ form factor with four USB 2.0 ports, Gigabit Ethernet and PoE header

  • CPU TypeOther
  • Reproduces Raspberry Pi 3B/3B+ form factor using Compute Module 4
  • Adds Gigabit Ethernet at 10/100/1000 M adaptive speeds
  • Provides four USB ports compatible with USB 2.0/1.1 transmission
  • Includes PoE header for connecting PoE HATs
  • Compatible with Pi 3B series HATs for development projects

CM4-to-Pi-3B adapter board

This adapter board lets you install a Raspberry Pi Compute Module 4 into a chassis designed for a Raspberry Pi 3 Model B or 3B+. It reproduces the original board outline so existing enclosures and mounting points still fit. The Compute Module 4 itself is not included and must be sourced separately.

For Pi 3B/3B+ board replacement.

Makers with legacy Pi 3B or 3B+ hardware can upgrade processing power while keeping their current cases, HATs and cable routing. Buyers who only need a bare Compute Module 4 carrier without the Pi 3 form factor should choose a different adapter.

Onboard standard CM4 connector accepting Lite

The board provides a standard Compute Module 4 socket that accepts both Lite and eMMC versions. This single connector determines which module variants can be used and is the key specification to verify before purchase.

Highlights

  • Reproduces Raspberry Pi 3B/3B+ form factor using Compute Module 4
  • Adds Gigabit Ethernet at 10/100/1000 M adaptive speeds
  • Provides four USB ports compatible with USB 2.0/1.1 transmission
  • Includes PoE header for connecting PoE HATs
  • Compatible with Pi 3B series HATs for development projects

Specifications

CPU TypeOther

Questions about this item

What Ethernet standard does the onboard RJ45 port support?

The RJ45 port is a Gigabit Ethernet interface with 10 / 100 / 1000 M adaptive speed negotiation.

What power supply is required for the Compute Module 4 when used with this adapter?

You must provide a 5 V / 4 A power source to the CM4; otherwise the board may shut down or throttle.

How do you enable the four USB 2.0 ports on the adapter?

USB 2.0 is disabled by default; add the dtoverlay directive in config.txt to activate the ports.

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