Raspberry Pi CM4-DUAL-ETH-4G/5G-BASE User Guide

Overview

This is a dual Gigabit ethernet 5G/4G base board, which is designed for Raspberry Pi Compute Module 4. It is suitable for evaluating the Raspberry Pi CM4 or being integrated into end products.

Notices

1. DO NOT hot-plug any devices except the USB and HDMI.
2. 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.
3. DO NOT connect other devices while writing CM4 via Type C interface for stable working.
4. 5V/2.5A or higher power supply is recommended for proper working.

Specifications

Dimensions

Writing Image

• Write Image for Compute Module Boards eMMC version
• Write Image for Compute Module Boards Lite version

4G/5G

To work with 4G/5G, you need to connect a wireless module to the M.2 B KEY for featuring corresponding functions. M.2 B KEY only extends USB3.0 interfaces, it doesn't support PCIe devices.

SIM card is required to work with the 4G/5G module
If you want to disable the 4G/5G module, you can set the GPIO6 to High and enable it again by setting the GPIO6 to Low.
The module requires about 30s to enable/disable the 4G/5G modules.

Status

Before you configure the 4G/5G module, please make sure that the module is working normally.

Configure 5G Modules

• Please refer to SIM8200EA-M2_5G_HAT

Configure 4G Modules

• Install minicom

sudo apt-get install minicom

• Run the minicom to configure moudules

sudo minicom -D /dev/ttyUSB2

• Configure the modules with the following command

AT+CUSBPIDSWITCH=9011,1,1

• Exit from the minicom and run the following command to assign IP for the usb0 (it maybe different if you connect other USB adapter)

sudo dhclient -v usb0

• If the network cannot connected properly, pleaes run theone of the following AT command to change the frequency and test it again.

AT+CNBP=0x0002000000400183,0x000001E000000000,0x0000000000000021
AT+CNBP=0x0002000000400180,0x480000000000000000000000000000000000000000000042000001E200000095,0x0000000000000021

AT commands

If your 4G modules cannot connect to network properly, please try to trobuleshoot by minicom and the AT commands.

sudo minicom -D /dev/ttyUSB2

Common AT commands

For more AT commands, please refer to： AT_Command_V2.00
You can also refer to：SIMCom

RTC FAN

To enable the I2C for controling the fan and the RTC, you need to add the line "dtparam=i2c_vc=on" on thw config.txt file
RTC is connected to i2c-10 with address 0x51（7bits）
FAN is connected to i2c-10 with address 0x2f（7bits）

sudo nano /boot/config.txt

Add the following lines to the end of the config.txt

dtparam=i2c_vc=on
dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi

And then comment out the line dtparam=audio=on

#dtparam=audio=on

Save the file and reboot the system

sudo reboot

RTC test

1.Download the test demo.

Open the terminal of the Raspberry Pi, enter the following command:

sudo apt-get install p7zip-full
sudo wget https://www.waveshare.com/w/upload/4/42/PCF85063_code.7z
7z x PCF85063_code.7z -O./
cd PCF85063_code

2. Run the demo

C

Execute the following commands to compile and execute the test demo:

cd c
sudo make clean
sudo make -j 8
sudo ./main

And then you can check the running result as below:

Python

Enter the python/example directory：

cd python/example

And then run the python demo, the demo can support python2/3

# python2
sudo python main.py
# python3
sudo python3 main.py

The running result is as below:

Using Hwclock

• Synchronize the system clock and the RTC

sudo hwclock -w

• Synchronize the hardware clock and the RTC

sudo hwclock  -s

Note that it will be restore if the network is diabled

• Set hardware clock

sudo hwclock --set --date="9/8/2021 16:45:05"

• Check the hardware clock

sudo hwclock -r

• Check the version

sudo hwclock --verbose

FAN test

【Note】Please connect the fan first before connecting the power to the Board to complete! Please do not connect the fan to the Board when the board is powered on(the fan control chip is powered on), otherwise, it will be damaged!
There is not official seting method for the cooling, there is a third-party project for reference.

• cmio-fan controlling.
  

mkdir -p ~/src
cd ~/src
git clone https://github.com/neg2led/cm4io-fan.git
cd cm4io-fan
sudo chmod 777 install.sh
sudo  ./install.sh

CSI DSI

CSI and DSI are disabled by default. When using the camera and DSI, it will occupy three I2C devices: I2C-10, I2C-11, and I2C-0.

• Open a terminal and run the following commands:
  

 sudo apt-get install p7zip-full
 wget https://www.waveshare.com/w/upload/4/41/CM4_dt_blob.7z
 7z x CM4_dt_blob.7z -O./CM4_dt_blob
 sudo chmod 777 -R CM4_dt_blob
 cd CM4_dt_blob/
 #If you want to use both cameras and DSI0
 sudo  dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp0-double_cam.dts
 #If you want to ue both cameras and DSI1
 sudo  dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp1-double_cam.dts

• And then connect the cameras and DSI display
  

1: Please power off the IO Board first before your connection.
2: Connect the power adapter after connecting the cameras and DSI display
3: Wait a few seconds before the screen boot up.
4: If the DSI LCD cannot display, please check if you have added /boot/dt-blob.bin. If there already has the dt-blob.bin, just try to reboot.
5: The camera needs to be enabled by raspi-config, enter sudo raspi-config on the terminal, choose Interfacing Options->Camera->Yes->Finish-Yes and reboot the system

• Test the Cameras:
  

Test camera0:

sudo raspivid -t 0 -cs 0

Test camera1:

sudo raspivid -t 0 -cs 1

For more information about the CSI camera and DSI display, please refer to:

• Guide of cmio camera
  
• Guide of cmio display