1. Introduction
The Waveshare CM4-to-Pi4-Adapter is designed to provide an alternative solution for users who wish to utilize the Raspberry Pi Compute Module 4 (CM4) with the form factor and interface compatibility of a Raspberry Pi 4B. This adapter allows the CM4 to function as a direct replacement for a Raspberry Pi 4B in many applications, offering a powerful and flexible computing platform.
It integrates essential interfaces such as USB 3.0, Gigabit Ethernet, and HDMI, making it highly compatible with existing Raspberry Pi 4B accessories and projects.
Image 1.1: Waveshare CM4-to-Pi4-Adapter.
This image displays the Waveshare CM4-to-Pi4-Adapter board from a top-down perspective, highlighting its various components including USB ports, HDMI ports, Ethernet port, and the CM4 connector area.
2. Key Features
- CM4 Connector: Onboard standard CM4 connector, supporting CM4 Lite/eMMC series boards with Quad Core Cortex A72 64-bit processor for powerful performance.
- Pi 4B Compatibility: Designed to reproduce the original appearance and interface layout of the Raspberry Pi 4B, ensuring compatibility with Pi 4B series HATs and accessories.
- USB 3.0 Ports: Features 4-channel USB 3.0 ports, compatible with USB 2.0/1.1 transmission for high-speed peripheral connectivity.
- Gigabit Ethernet: Includes an RJ45 Gigabit Ethernet port (10/100/1000 M adaptive) for reliable network connectivity.
- PoE Support: Onboard PoE header for connecting Power over Ethernet (PoE) HATs.
- DSI Interface: DSI1 interface for display connectivity.
- USB Type-C: USB Type-C interface for power supply or as a USB SLAVE interface for programming images.
3. Setup and Installation
3.1 Package Contents
Before proceeding, please verify that all components are present in your package:
Image 3.1: Package contents showing the CM4-to-Pi4-Adapter board and mounting accessories.
The image displays the Waveshare CM4-to-Pi4-Adapter board along with a set of four small screws and four hexagonal standoffs, which are typically used for mounting the board or attaching other components.
- Waveshare CM4-to-Pi4-Adapter Board
- Mounting Screws and Standoffs (quantity as shown in image)
3.2 Installing the Compute Module 4 (CM4)
The CM4-to-Pi4-Adapter requires a Raspberry Pi Compute Module 4 (CM4) to function. Follow these steps to properly install the CM4 onto the adapter board:
- Carefully align the CM4 with the standard CM4 connector on the adapter board. Ensure the pins are correctly oriented.
- Gently press down on the CM4 until it is securely seated in the connector. Do not force it.
- (Optional) If your CM4 requires additional cooling, consider installing a heatsink or fan before proceeding.
Image 3.2: Installation of CM4 onto the adapter board.
This image illustrates a Raspberry Pi Compute Module 4 (CM4) being connected to the dedicated CM4 slot on the Waveshare CM4-to-Pi4-Adapter. The CM4 is shown with its components facing upwards, ready to be seated into the connector.
3.3 Power Supply Requirements
The CM4-to-Pi4-Adapter, with the CM4 installed, requires a stable 5V 2A power supply. It is crucial to use a power supply that meets these specifications to ensure proper operation and prevent issues such as unexpected shutdowns or reduced performance.
- Connect the power supply to the USB Type-C port on the adapter board.
- When programming images via the micro USB port, ensure no other devices are connected to the adapter to guarantee sufficient power delivery to the CM4.
4. Operating Instructions
4.1 Connecting Peripherals
Once the CM4 is installed and power is connected, you can attach various peripherals:
- USB Devices: Use the 4x USB 3.0 ports for keyboards, mice, external storage, and other USB peripherals.
- Network: Connect an Ethernet cable to the RJ45 Gigabit Ethernet port for wired network access.
- Displays: Connect displays to the HDMI ports (HDMI0 and HDMI1).
- Camera/Display: Utilize the CSI (Camera Serial Interface) and DSI (Display Serial Interface) ports for compatible camera modules and displays, respectively.
Image 4.1: Interface Introduction.
This diagram provides a clear overview of the various ports and connectors available on the Waveshare CM4-to-Pi4-Adapter. Key interfaces highlighted include the CM4 connector, CSI Port, PoE Header, Gigabit Ethernet Port, USB-C Power Supply, two Micro HDMI Ports, four USB 3.0 Ports, DSI Port, and TF Card Slot.
4.2 Booting and Operating System
The adapter relies on the operating system installed on your Compute Module 4. Typically, this will be Raspberry Pi OS or another compatible Linux distribution.
- Ensure your CM4 has a compatible operating system image flashed onto its eMMC storage or a connected SD card (if using a CM4 Lite).
- Upon connecting power, the system should boot automatically.
- Refer to the official Raspberry Pi documentation for detailed instructions on flashing operating system images to the CM4.
5. Maintenance
To ensure the longevity and optimal performance of your Waveshare CM4-to-Pi4-Adapter, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the board. Avoid using liquids or abrasive cleaners. For dust in connectors, use compressed air.
- Environment: Operate the adapter in a clean, dry environment, away from extreme temperatures, humidity, and direct sunlight.
- Handling: Always handle the board by its edges to avoid touching components, which can cause damage from static electricity or oils from your skin.
- Power Off: Always power down the system correctly before disconnecting power or peripherals.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Board does not power on. | Insufficient power supply; CM4 not seated correctly; faulty power cable. | Ensure a 5V 2A power supply is used. Re-seat the CM4. Try a different USB-C cable and power adapter. |
| USB devices not recognized. | Driver issues; device incompatibility; power draw. | Ensure your OS has necessary drivers. Check device compatibility. If using high-power USB devices, consider a powered USB hub. |
| No display output. | Incorrect HDMI port; display settings; faulty cable. | Ensure cable is connected to HDMI0 or HDMI1. Check display input. Try a different HDMI cable. Verify OS display settings. |
| Network connectivity issues. | Faulty Ethernet cable; network configuration. | Try a different Ethernet cable. Check network settings in your OS. Verify router/switch connection. |
7. Specifications
| Feature | Detail |
|---|---|
| Model | CM4-to-Pi4-Adapter |
| Compatible Module | Raspberry Pi Compute Module 4 (CM4 Lite/eMMC series) |
| USB Ports | 4x USB 3.0 (compatible with USB 2.0/1.1) |
| Ethernet | RJ45 Gigabit Ethernet (10/100/1000 M adaptive) |
| Video Output | 2x Micro HDMI |
| Camera Interface | CSI Port |
| Display Interface | DSI Port (DSI1) |
| Power Input | USB Type-C (5V 2A recommended) |
| PoE Support | Yes, via PoE header (requires PoE HAT) |
| Dimensions | 10.8 x 7.8 x 3.4 cm (approximate package dimensions) |
| Weight | 60 grams (approximate item weight) |
Image 7.1: Outline Dimensions.
This image provides a technical drawing of the Waveshare CM4-to-Pi4-Adapter, detailing its physical dimensions in millimeters. Key measurements shown are 85mm in length, 49mm in width, and specific distances for port placements like 58mm between HDMI ports and 56mm for the camera connector area.
8. Warranty and Support
For warranty information and technical support, please refer to the official Waveshare website or contact their customer service directly. Keep your purchase receipt as proof of purchase for any warranty claims.
Manufacturer: Waveshare
Website: www.waveshare.com (General website, specific support link may vary)
