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.
- 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 for stable working.
- 5V/2.5A or higher power supply is recommended for proper working.
|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 standard Nano-SIM card for 5G/4G/3G/2G communication|
|USB||USB 3.2 Gen1 × 2|
|PIN HEADER||Raspberry Pi 40PIN 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 Compute Module 4|
|STORAGRE||MicroSD card socket for Compute Module 4 Lite (without eMMC) variants|
|FAN HEADER||5V/12V (12V by default), allows speed adjustment and measurement|
|DIMENSIONS||99.6 × 87.0mm|
|1||CM4 Connector||Applies to all versions of Compute Module 4|
|2||40PIN GPIO interface||Easy to connect various HAT modules|
|3||RJ45 Gigabit Ethernet port||Dual RJ45 Gigabit Ethernet port, support 10/100/1000M network access|
ETHERNET 0: CM4 native network port
ETHERNET 1: USB expansion network port
|4||HDMI port||Dual HDMI port, support dual 4K 30fps output|
|5||USB 3.2 Ports||2-way USB 3.2 Gen1 ports, support various USB devices|
|6||PWR & USB interface||5V DC power supply interface or USB burning interface|
|7||FAN interface||Easy to connect to the cooling fan, support speed regulation and speed measurement|
|8||CAM Interface||Dual MIPI CSI Camera Interface|
|9||4G/5G module status light||STA red light: module enable indicator|
NET green light: module running status indicator
|10||Dual LED lamp holder||Red light: Raspberry Pi power indicator|
Green light: Raspberry Pi working status indicator
|11||BOOT switch button||ON: Compute Module 4 boots to USB Type-C port|
OFF: Compute Module 4 boots to eMMC or Micro SD card
|12||DISP1 interface||MIPI DSI display interface|
|13||M.2 B KEY||Communication module that supports access to 4G/5G or other USB channels|
|14||Nano-SIM Card Holder||Can be connected to a standard Nano-SIM card for 4G/3G/2G Internet access|
|15||Micro SD Card Interface||Used to insert a Micro SD card with the system to start the Compute Module 4 Lite|
|16||RTC Battery Connector||Can be connected to CR2032 button battery|
|17||RTC Interrupt Pin Switch||PI-RUN: RTC Trigger Interrupt CM4 Restart|
GN-EN: RTC Trigger Interrupt CM4 Power Off
D4: RTC Trigger Interrupt D4 Pin
|18||IO-VREF selection||CM4 IO logic voltage switch 3.3V or 1.8V|
|19||FAN Power Supply Options||You can choose 5V or 12V to drive the fan|
|20||RTC/FAN I2C bus selection||SDA0/SCL0: shared by I2C-10 and CSI/DSI|
GPIO3/2: shared by I2C-1 and 40PIN
|21||System function switch||BT_DIS: Bluetooth disabled, only for CM4 version with antenna|
WiFi_DIS: WiFi disabled, only for CM4 version with antenna
WP_DIS: Boot mode switch, only For use without EMMC boot or SD boot
|22||RTL8153||USB Gigabit LAN chip|
- Write Image for Compute Module Boards eMMC version
- Write Image for Compute Module Boards Lite version
Do not plug or unplug any device while it is powered on.
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.
|ON||OFF||Shutdown or Stating|
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
- 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.
If your 4G modules cannot connect to network properly, please try to trobuleshoot by minicom and the AT commands.
sudo apt-get install minicom sudo minicom -D /dev/ttyUSB2
- Common AT commands
|ATE||ATE1 enable echo
ATE0 disable echo
|AT+CGMM||Check module type||OK|
|AT+CSUB||Check module version||OK|
|AT+CGMR||Check firmware version||OK|
|AT+IPREX||Configure hardwara baud rate||+IPREX:|
|AT+CSQ||Check signal quanlity||+CSQ: 17,99|
|AT+CPIN?||Check SIM status||+CPIN: READY|
|AT+COPS?||CHeck the current supplier||+COPS:|
|AT+CREG?||Check network status||+CREG:|
|AT+CPSI?||Check UE information|
|AT+CNMP||Configure network mode：
48 ： Any modes but LTE
For more AT commands, please refer to： AT_Command_V2.00
You can also refer to：SIMCom
- Note 1: Please connect the cooling fan before you power the whole device, otherwise, the control chip will be damaged!
- Note 2: Please check the voltage before you connect the cooling fan, it is default 12V.
Use Raspberry Pi system (2021-05-07-raspios-buster-armhf-full)
DO NOT use DSI and CSI when using RTC.
If you need to use it at the same time, switch the I2C to the I2C1 device (right).
All programs or drivers need to be modified after switching.
The demo uses I2C10 by default (left).
If you need to use it simply, or add it to your program, refer to the C and Python demo reference [click here] The following is to add the driver to the kernel.
sudo nano /boot/config.txt #Add at the end dtparam=i2c_vc=on dtoverlay=i2c-rtc,pcf85063a,i2c_csi_dsi #Add # in front of dtparam=audio=on #dtparam=audio=on #Save and exit, restart sudo reboot
- 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
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
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:
Enter the python/example directory：
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:
When powered on, the fan will spin for 1 second, then stop for 2 seconds, and then spin again. This is normal.<br\> There is currently no official configuration method for fans, there is a third-party configuration method: https://github.com/neg2led/cm4io-fan<br\> This method is released by a third party, not an official release, and we are not responsible for any problems! <br\>
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 #The following is a description of config.txt ############################# Name: cm4io-fan Info: Raspberry Pi Compute Module 4 IO Board fan controller Load: dtoverlay=cm4io-fan,<param>[=<val>] Params: minrpm RPM target for the fan when the SoC is below mintemp (default 3500) maxrpm RPM target for the fan when the SoC is above maxtemp (default 5500) midtemp Temperature (in millicelcius) at which the fan begins to speed up (default 50000) midtemp_hyst Temperature delta (in millicelcius) below mintemp at which the fan will drop to minrpm (default 2000) maxtemp Temperature (in millicelcius) at which the fan will be held at maxrpm (default 70000) maxtemp_hyst Temperature delta (in millicelcius) below maxtemp at which the fan begins to slow down (default 2000) ############################# Or directly refer to the following: dtoverlay=cm4io-fan,minrpm=500,maxrpm=5000,midtemp=45000,midtemp_hyst=2000,maxtemp=50000,maxtemp_hyst=2000 The temperature is higher than 45 degrees Celsius and starts to accelerate, and the highest speed is higher than 50 degrees Celsius.
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:
wget https://www.waveshare.net/w/upload/7/75/CM4_dt_blob_Source.zip unzip -o CM4_dt_blob_Source.zip -d ./CM4_dt_blob_Source sudo chmod 777 -R CM4_dt_blob_Source cd CM4_dt_blob_Source/ #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 #When using any DSI interface, HDMI1 will have no image output, even if you do not connect the DSI screen, as long as you compile the corresponding file, then HDMI1 will not output #If you need to restore, please delete the corresponding dt-blob.bin: sudo rm -rf /boot/dt-blob.bin # After execution, turn off the power and restart the CM4
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
Old Version (Buster)
- Test the Cameras:
sudo raspivid -t 0 -cs 0
sudo raspivid -t 0 -cs 1
New Version (Bullseye)
If you are using the latest Raspberry Pi OS (Bullseye):
libcamera-hello -t 0 or libcamera-hello #The new system uses dual cameras #Remove or comment out the line camera_auto_detect=1 in config.txt #camera_auto_detect=1 #Add the following lines: dtoverlay=imx219,cam1 dtoverlay=imx219,cam0 #Add the corresponding line according to the camera you use, where imx219 is the camera sensor model, and there are other sensors dtoverlay=ov5647,cam0 dtoverlay=imx219,cam0 dtoverlay=ov9281,cam0 dtoverlay=imx477,cam0 #then restart reboot #Other part of the commands: #Check if the camera is detected libcamera-hello --list-cameras #Open the corresponding camera libcamera-hello --camera 1 libcamera-hello --camera 0 #Taking Pictures libcamera-jpeg -o test.jpg #You can add --camera to specify the camera
More instructions click me
- HDMI1 is disabled if you use DSI interfaces for displaying, even if you just compile the corresponding files without connecting to the DSI screen, please note it
- Any connection of two HDMI ports can output images, not limited to which HDMI port, if two HDMI screens are connected, only HDMI0 has image output
- If you want to enable both HDMI, please delete the dt-blob.bin file with the following command:
sudo rm -rf /boot/dt-blob.bin
- Then reboot
Reference Raspberry Pi Manual
For more information about the CSI camera and DSI display, please refer to:
Openwrt has high customization and scalable performance. Openwrt is becoming more and more popular at present. Compared with commonly used wireless routers, OpenWrt's modifiable firmware allows us to customize router functions according to our own needs, such as single-arm routing, automatic Define routing policies, qos, etc., intranet penetration, etc.
Compiled without configuration
Note: The openWrt system will not provide any technical support if there is any problem during use, only the following tutorials and images are provided, and no other technical support other than hardware is provided.
The OpenWrt image configured above supports CM4 onboard wifi and the driver of RTL8153. CM4 can be turned into a smart router,
The following will tell you how to install Openwrt on the Raspberry Pi to realize the function of a wireless router so that the devices in the local area network can access the Internet through the wireless router, and realize the intelligent management of the local area network. The overall network topology is shown below.
After booting up correctly, log in to the system:
The computer is connected to the ETH0 interface, and then directly ssh remote login or web page login
The configured system default IP is: 192.168.14.1
The default IP of the system without configuration is: 192.168.1.1
Account: root without password
If you think the network port is not enough, you can buy USB 3.2 Gen1 TO Gigabit ETH RTL8153 expansion network port, if any ETH/USB HUB HAT RTL8152 can also expand the 100M Ethernet port and support it.
- Raspberry Pi Compute Module 4 IO Board Brief
- Raspberry Pi Compute Module 4 IO Board Datasheet
- CSI Camera Reference
- DSI Display Reference
If you require technical support, please go to the Support page and open a ticket.