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

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 ports for camera modules, 1x DSI port for DSI displays, 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

Specifications

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

Resources

• Product Wiki