CM4 to 4B Adapter

WaveshareSKU: WAV-23508
Sale price £25.80
incl. VAT
excl. VAT
Only 3 units left

Awesome Extras

Raspberry PiRaspberry Pi Compute Module 4
Sale priceFrom £28.80 incl. VAT excl. VAT
SanDiskSanDisk MicroSD Card (Class 10 A1)
Sale priceFrom £6 incl. VAT excl. VAT
Raspberry PiRaspberry Pi PoE+ HAT
Sale price £19.20 incl. VAT excl. VAT

At the time of writing it's a little tricky to get your hands on a CM4...or a Raspberry Pi 4 for that matter (not for long)...but hey, if you're lucky enough to have a Compute Module 4 lying around and you would prefer the Raspberry Pi 4 format - this board is for you!

This adapter board accepts your Raspberry Pi Compute Module 4 and converts it to the Raspberry Pi 4 format (along with a few perks) - 2x MicroHDMI, 1x USB-C, 4x USB 3.0, full 40-pin colour-coded GPIO header, Gigabit Ethernet, PoE header, CSI/DSI ports, MicroSD slot, fan header and a boot selection switch.

We're really digging the 4x USB 3.0 ports and the option to use a CM4 with onboard storage to avoid the use of a MicroSD card - and that 5V fan header will be dead handy too.

A product wiki is on hand to help with a few considerations for setup, but other than that it's good to go.

CM4 is not included.

Adapt them all!

We have a few other options in the store if you're into this CM4 adapting life:


  • Onboard standard CM4 connector, support access to CM4 Lite / eMMc series
  • Easily compatible with the interfaces of Raspberry Pi 4 B board
  • 4x USB 3.0 ports, compatible with USB 2.0 / 1.1 transmission
  • RJ45 Gigabit Ethernet port, 10 / 100 / 1000 M adaptive
  • PoE header, for connecting PoE HATs
  • Colour-coded GPIO header
  • Boot selection switch
  • 2x micro-HDMI
  • USB-C for power supply (can be used as the USB SLAVE interface for programming images)
  • CSI/DSI ports
  • Fan header
  • MicroSD slot

Onboard Features

No. Name Description
1 CM4 socket For all variants of Compute Module 4
2 40-pin GPIO header For connecting to all HATs
3 PoE Support access to PoE HAT
4 Gigabit Ethernet port Supports 10 / 100 / 1000M network
5,6 USB3.0 interface 4x USB3.0 interface, support USB devices
7 FAN header For 5V fan. Does not support speed regulation
8 HDMI interface 2 x Micro HDMI interface, supports 4K 30fps output
9 USB Type C 5V/2.5A power supply
Can also be used for eMMC programming
10 LED indicator Indicating the working status of the Raspberry Pi
11 BOOT ONCM4 USB Type C booting guide
OFF: eMMC or SD card boot guide
12 CAM interface MIPI CSI interface
13 Micro SD card slot Only for the Lite CM4 usage
14 DISP1 interface MIPI DSI interface, DISP1 interface
15 IO-VREF selection CM4 IO logic voltage switch 3.3V or 1.8V
16 Function pin RUN: CM4 running status pin
GL-EN: Power supply enable pin
17 System function switch BT_DIS: Bluetooth disabled,  for CM4 with antenna
WiFi_DIS: WiFi disabled,  for CM4 with antenna
WP_DIS: EEPROM write protection


Package Contents

  • 1x CM4 to Pi4 Adapter
  • 1x Screws pack (attached to the board)

CM4 is not included

Payment & Accreditations

Payment methods
Visa Mastercard Maestro PayPal Amazon Klarna

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.