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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

  • 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.

How it compares

Measured against everything we stock in USB-C Multiport Adapters, at today’s prices. Recalculated every night.

Price $41.99
Pricier than about 81% of the 89 comparable items (median $18.99).

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Specifications

Processor
ProcessorOther

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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