CM4-IO-BASE-BOX-B + USB HDMI Adapter, for Raspberry Pi Compute Module 4

SKU: 20272
Part Number: CM4-IO-BASE-Acce D
Brand: Waveshare


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CM4-IO-BASE-BOX-B + USB HDMI Adapter, for Raspberry Pi Compute Module 4

more USB and HDMI connectors via FFC

Mini-computer based on CM4

Designed for Raspberry Pi Compute Module 4

Waveshare CM4-IO-BASE-B (Full Ver.) inside, fast and easy to build a mini-computer

Waveshare mini IO Board (Full Ver.) inside

make it easy to build your own Raspberry Pi CM4 mini PC

for reference only, CM4 and antenna are NOT included.
Comparing the expansion boards
CM4 IO Board
mini Base

Dual Gigabit ETH

PoE Base (B)

PoE Base

Raspberry Pi official
Lite Ver. Full Ver.
PoE N/A integrates 802.3af-compliant PoE circuit (5V/2.5A) PoE header only
USB USB 2.0 × 2
USB 2.0 × 2 (via FFC connector)
USB 3.2 Gen1 × 3 USB 2.0 × 4 USB 3.2 Gen1 × 4 USB 2.0 × 4
(2x via pin header)
GPIO Raspberry Pi 40PIN GPIO × 1
Header M.2 slot × 1 N/A RS485 × 1
RS232 × 1
PCIe Gen 2 × 1
N/A PCIe Gen 2 × 1
(1x via FFC connector)
supports 4K 30fps output
HDMI × 2
supports 4K 30fps output
DSI Display MIPI DSI × 1
(15pin 1.0mm FPC)
(15pin 1.0mm FPC)
(22pin 0.5mm FPC)
CSI Camera MIPI CSI-2 × 2
(15pin 1.0mm FPC)
MIPI CSI-2 × 2
(22pin 0.5mm FPC)
Power Input 5V 7V~36V 5V 7V~36V 12V
Fan 5V 5V / 12V 12V
no fan control allows speed adjustment and measurement
RTC N/A Real-time clock with battery socket and ability to wake Compute Module 4
RJ45 Ethernet Gigabit Ethernet Dual Gigabit Ethernet Gigabit Ethernet
CM4 Socket suitable for all variants of Compute Module 4
SD Card Slot MicroSD card socket for Compute Module 4 Lite (without eMMC) variants
Dimensions (mm) 85.0 × 56.0 109.0 × 91.5 124.50 × 108.80 160 × 90
Rich peripheral connectors

onboard connectors including
CSI/DSI/RTC/FAN/HDMI/USB/RJ45 Gigabit Ethernet/Micro SD Card Slot/M.2 Slot

Precise cut-out with clear label

each cut-out is completely aligned with the connector

Cooling fan included

comes with cooling fan, combined with the airflow vent, better heat dissipation

Wall mount support

wall mount holes on two sides, handy for mounting

Application examples

Binocular Vision Raspberry Pi Projects, Or Other Industrial Context

for reference only, display, cameras, antennas are NOT included.
Outline dimensions
Resources & Services

* Resources for different product may vary, please check the wiki page to confirm the actually provided resources.

Weight: 0.415 kg

Quick Overview

  1. CM4-IO-BASE-B x1
  2. Metal case (top and bottom) x1
  3. USB-A to USB-C cable 1m x1
  4. USB HDMI Adapter x1
  5. FFC cable 6PIN 1.0 pitch 60mm x1
  6. FFC cable 20PIN 0.5 pitch 60mm x1
  7. Fan-4010-PWM-5V x1
  8. 5V 3A USB-C power adapter x1
  9. Screwdriver x1
  10. Screws pack x1