Dual Gigabit Ethernet 5G/4G Base Board for Raspberry Pi CM4

WaveshareSKU: WAV-20885
Sale price £64.80
incl. VAT
excl. VAT
Only 10 units left

Awesome Extras

Raspberry PiRaspberry Pi Compute Module 4
Sale priceFrom £28.80 incl. VAT excl. VAT
ANSMANNCR2032 3V Lithium Coin Cell Battery
Sale price £1.20 incl. VAT excl. VAT

This is a dual Gigabit ethernet 5G/4G base board from Waveshare, designed for the Raspberry Pi Compute Module 4 (not included).

This base board's main features are the dual-Gigabit Ethernet ports, allowing you to evaluate the CM4 as a controller for a custom router project. You'll need to compile your own software for this with very limited information from the manufacturer, so this is not intended for novice users!

There's also a slot for an M.2 B-Key 4G/5G module (not included) allowing the addition of LTE functionality for your project. Alongside this is a nano sim card slot option 5G/4G/3G/2G connectivity as well.

The board also features 2x USB 3.2 ports, an RTC and backup battery holder, fan header, 2x CSI and 1x DSI ports, 2 full-size HDMI ports and a Micro-SD card slot!

Base board only. Does not include the CM4, power supply or M.2 B-Key module. This allows you to choose your wireless and power options separately.

Important Notes

  • DO NOT hot-plug any devices except the USB and HDMI
  • Please check the fan voltage before connecting the cooling fan. The BASE board supports a 12V cooling fan by default, if you want to use a 5V cooling fan, please change the FAN_VCC resistor
  • DO NOT connect other devices while writing CM4 via Type-C interface
  • 5V/2.5A or higher power supply is recommended

What's Onboard?

1) CM4 socket
 - suitable for all variants of Compute Module 4
2) 40-Pin GPIO header
 - For connecting sorts of HATs
3) Dual RJ45 Gigabit Ethernet
 - 10/100/1000M compatible
 - ETHERNET 0: CM4 original ETH
 - ETHERNET 1: USB extended ETH
4) HDMI connectors
 - 2x HDMI, supports 4K 30fps output
5) USB 3.2 ports
 - 2x USB 3.2 Gen1, for connecting sorts of USB devices
6) PWR & USB
 - DC power supply or USB programming port
7) Fan header
 - For connecting cooling fan, allows speed adjustment and measurement
8) Camera Port
 - 2x MIPI CSI camera ports
9) 4G/5G module status indicator
 - STA red: module enable indicator
 - NET green: module operating status indicator
10) CM4 status indicator
 - PWR red: Raspberry Pi power indicator
 - ACT green: Raspberry Pi operating status indicator
11) BOOT selection
 - ON: CM4 will be booted from USB-C interface
 - OFF: CM4 will be booted from eMMC or Micro SD card
12) Display Port
 - MIPI DSI display port
13) M.2 B KEY
 - Supports 4G/5G modules, or other communication modules using USB channel
14) Nano-SIM card slot
 - Supports standard Nano-SIM card for 5G/4G/3G/2G communication
15) Micro SD card slot
 - For connecting a Micro SD card with pre-burnt image (Lite variant ONLY)
16) RTC battery holder
 - Supports CR2032 button cell
17) RTC interruption configuration
 - PI-RUN: CM4 will reboot on RTC interruption
 - GL-EN: CM4 powerdown on RTC interruption
 - D4: D4 pin is triggered on RTC interruption (default)
18) IO-VREF selection
 - Set the CM4 IO logic level as 3.3V (default) or 1.8V
19) Fan power supply selection
 - Select 12V (default) or 5V power to drive the fan
20) RTC/FAN I2C bus selection
 - SDA0/SCL0: I2C-10 is shared with CSI/DSI (default)
 - GPIO3/2: I2C-1 is shared with 40-pin header
21) System function configuration
 - BT_DIS: Bluetooth disabled, for CM4 with antenna variant ONLY
 - WiFi_DIS: WiFi disabled, for CM4 with antenna variant ONLY
 - WP_DIS: boot mode switch, ONLY be used when NOT booted from eMMC or SD card
22) RTL8153
 - USB Gigabit Ethernet chip


CM4 Socket Suitable for all variants of Compute Module 4
Networking Dual Gigabit Ethernet RJ45
M.2 B KEY, for connecting 5G / 4G module
Nano-SIM card slot, supports  Nano-SIM card for 5G/4G/3G/2G
USB USB 3.2 Gen1 × 2
Pin Header Raspberry Pi 40-pin GPIO header
Display MIPI DSI port (15pin 1.0mm FPC connector)
Camera MIPI CSI-2 port × 2 (15pin 1.0mm FPC connector)
Video HDMI × 2, supports 4K 30fps output
RTC Real-time clock with a battery socket and ability to wake CM4
Storagre MicroSD card socket for Compute Module 4 Lite (without eMMC) variants
Fan Header 5V/12V (12V by default), allows speed adjustment and measurement
Power Input 5V/2.5A
Dimensions 99.6 × 87.0mm

Package Contents

  • 1x Dual Gigabit Ethernet 5G/4G Base Board

CM4, power supply and M.2 B-key communication module not included


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