Waveshare CM4 Nano Base Board Review (2026): A Spec-Based Look
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This waveshare nano base board review focuses on the Waveshare CM4 Nano Base Board (B). It is a carrier board designed for the Raspberry Pi Compute Module 4. The board matches the CM4 footprint exactly, making it ideal for tight spaces. It features a standard CM4 socket and includes Gigabit Ethernet for reliable networking. You also get a 40-pin GPIO header, USB 2.0, DSI, CSI, and a 3.5mm audio jack. Note that the Compute Module 4 itself is not included. You must purchase it separately to use this board. The design prioritizes compact integration over extensive onboard features.
What stands out
- Gigabit Ethernet port for stable network connections
- Standard CM4 socket for direct module integration
- Compact dimensions: 1.61 x 2.2 x 0.39 inches
- 40-pin GPIO header for peripheral expansion
- Micro SD card socket for Lite variants
Who it fits
Good fit for
This board suits engineers and hobbyists integrating a Raspberry Pi Compute Module 4 into custom enclosures or narrow application environments. If you need a small form factor with Gigabit Ethernet and standard GPIO, this fits your setup. It is also useful for evaluating the CM4 in a controlled, compact setting. The inclusion of DSI and CSI supports display and camera projects. You will appreciate the straightforward design if you want to add networking and I/O without bulk.
Who should skip it
Skip this option if you need a complete, ready-to-use computer. This board does not include the Compute Module 4, so you must buy that separately. It also lacks built-in storage for models with eMMC, relying instead on a Micro SD card for Lite versions. If you require multiple USB 3.0 ports or HDMI outputs, this board does not provide them. It is strictly a carrier board, not a standalone system. You need additional components to make it functional.
Verdict: The Waveshare CM4 Nano Base Board (B) is a compact, spec-driven carrier for the Raspberry Pi Compute Module 4. It offers essential connectivity in a tiny footprint for integration-focused projects.
Key specs explained
Gigabit Ethernet
This network port supports data transfer speeds up to 1000 Mbps. You can stream high-definition media or transfer large files between devices quickly. It is essential for stable internet connections in compact setups. When shopping for small form factor computers, look for this standard to ensure reliable wired networking performance for your home or office network.
1.61 inches width
This measurement defines the horizontal span of the board. It allows the device to fit into very narrow slots or custom enclosures. You benefit from this compact dimension when space is limited in your project. Compare this size with standard mini PCs to understand how much desk or rack space this solution actually saves in tight environments.
0.39 inches height
This low profile ensures the board sits flat against mounting surfaces. It prevents interference with nearby components or cooling fans. You can stack or hide this unit easily in tight chassis. When evaluating small computers, check height specs to ensure compatibility with your existing case or custom build constraints.
2.2 inches length
This dimension sets the vertical span of the carrier board. It matches the standard footprint of the Compute Module 4. You can use existing mounts designed for CM4 modules. This consistency simplifies integration into existing projects. Compare this length with other carrier boards to ensure it fits your specific mechanical design requirements.
0.71 ounces weight
This light weight reduces the overall mass of your build. It minimizes stress on mounting points and reduces inertia if the unit moves. You benefit from this low weight in portable or suspended setups. When choosing small computers, lighter boards often indicate simpler designs suitable for non-demanding structural applications.
Compact Design and Physical Build
The Waveshare CM4 Nano Base Board (B) is engineered for environments where space is at a premium. According to the listing, the board shares the exact same footprint as the Compute Module 4 itself. This design choice allows you to integrate the board into narrow application areas without requiring extra room. The physical dimensions are listed as 2.2 inches in length, 1.61 inches in width, and 0.39 inches in height. These small measurements ensure it fits easily into tight enclosures or custom cases where standard-sized boards would not fit.
Weight is another factor for portable or suspended installations. The listing states the board weighs 0.71 ounces. This light mass reduces strain on mounting points and makes the unit easy to handle during assembly. The compact size and low weight make it suitable for evaluating the CM4 or integrating it directly into end products that require minimal bulk.
Layout features include a standard CM4 socket, which is the primary connection point for the compute module. Additional interfaces are arranged to support common peripheral needs. You get a 40-pin GPIO header for general-purpose input and output tasks. A gigabit Ethernet port provides network connectivity. Other included interfaces are USB 2.0, DSI and CSI connectors for displays and cameras, and a 3.5mm audio jack. Storage options depend on the specific CM4 variant you use, with a micro SD card socket available for Lite models that lack internal eMMC. This layout keeps essential connections accessible while maintaining a small profile.
Setup and everyday use guide
Setting up this board requires a separate Raspberry Pi Compute Module 4. The listing explicitly states that the CM4 is not included. You must purchase the module independently to integrate it into this base board. Once you have the compatible module, installation is straightforward. The board features a standard CM4 socket. This ensures you can insert the module securely without needing custom adapters or complex wiring. The physical dimensions are 2.2 inches in length, 1.61 inches in width, and 0.39 inches in height. This small footprint allows you to place it in narrow application environments where space is limited. The board weighs only 0.71 ounces, adding minimal bulk to your project. For storage, the design includes a Micro SD card socket. This is necessary for Compute Module 4 Lite variants that do not have built-in eMMC. You will insert your SD card into this slot to boot the operating system. Daily use involves connecting peripherals through the available interfaces. You have access to a 40PIN GPIO header for general purpose input and output tasks. A Gigabit Ethernet port provides your network connection. This supports data transfer speeds up to 1000 Mbps, which is suitable for streaming or file transfers. Additional connectivity includes USB 2.0 ports, DSI for displays, CSI for cameras, and a 3.5mm audio jack. These options allow you to build a functional mini computer or embedded system. The board is suitable for evaluating the CM4 or integrating it into end products. You can rely on these standard interfaces for consistent performance in compact setups.
Before you buy this board
You need to understand this is not a complete computer. It is a carrier board that requires a separate Raspberry Pi Compute Module 4. You must purchase the compute module independently. The listing confirms the CM4 is not included. Check your specific CM4 variant. If you choose the Lite version, it lacks internal eMMC storage. You will need a Micro SD card for the operating system. This board fits into narrow spaces due to its small footprint. It measures just 1.61 inches wide. It sits alongside other mini PCs as a component for custom builds. It suits developers or integrators who need a compact foundation. You should verify your case dimensions match the board size. The gigabit ethernet port helps with stable network connections. Keep the environment dust-free to maintain the GPIO pins. This setup demands more effort than a plug-and-play mini PC.
Check before you buy
- Buy a Raspberry Pi Compute Module 4 separately
- Get a Micro SD card if using the Lite variant
- Verify your case fits the 1.61 inch width
- Check if you need the 40PIN GPIO connections
The product at a glance
Waveshare CM4 Nano Base Board with Gigabit Ethernet
Best for: compact Raspberry Pi CM4 embedded projects
- Ethernet
- Gigabit Ethernet
- Dimensions
- 2.2 × 1.61 × 0.39 inches
- Weight
- 0.71 ounces
View on Amazon: Waveshare CM4 Nano Base Board with Gigabit Ethernet Affiliate link
This carrier board gives you a compact platform matching the footprint of a Raspberry Pi Compute Module 4. At 2.2 by 1.61 inches and 0.71 ounces, it integrates Gigabit Ethernet, a 40-pin GPIO header, USB 2.0, DSI, CSI, and a 3.5mm audio jack. It suits your build if you need full CM4 capabilities inside tight enclosures.
Pros
- Matches the compact CM4 footprint at 2.2 by 1.61 inches
- Includes Gigabit Ethernet networking
- Equipped with standard 40-pin GPIO, DSI, and CSI interfaces
- Built-in Micro SD card slot for CM4 Lite modules
Cons
- Compute Module 4 is not included
- USB interface is limited to USB 2.0 speed
- Micro SD card slot only functions with CM4 Lite variants
Good fit if
- You need a base board matching the exact dimensions of the CM4 module.
- You require Gigabit Ethernet alongside a standard 40-pin GPIO header.
- You use a CM4 Lite and need on-board Micro SD card storage.
Skip if
- You need USB 3.0 transfer speeds for high-bandwidth peripherals.
- You want an all-in-one system that includes the processor and memory.
Verdict: Waveshare CM4 Nano Base Board provides essential wired networking and expansion headers in an ultra-compact footprint for space-constrained embedded setups.
Specifications side by side
| Spec | Waveshare CM4 Nano Base Board with Gigabit Ethernet |
|---|---|
| Ethernet | Gigabit Ethernet |
| Networking | Gigabit Ethernet |
| Dimensions | 2.2 × 1.61 × 0.39 inches |
| Weight | 0.71 ounces |
| Model | Nano Base Board (B) |
Frequently asked questions
What is the exact size of the Waveshare CM4 Nano Base Board?
The board measures 2.2 inches in length, 1.61 inches in width, and 0.39 inches in height. These compact dimensions allow it to fit into very tight spaces. The small footprint matches the Compute Module 4 exactly. This makes it ideal for projects where space is limited. You can integrate it easily into custom enclosures without taking up much room.
Does the Waveshare CM4 Nano Base Board include the Compute Module 4?
No, the listing explicitly states that the Compute Module 4 is not included. You must purchase the CM4 separately to use this base board. It serves only as a carrier board for the module. This setup allows you to choose the specific CM4 variant you need. It keeps the base board flexible for different processing requirements.
What networking capabilities does this base board offer?
It features a Gigabit Ethernet port. This port supports data transfer speeds up to 1000 Mbps. You can rely on it for stable internet connections in compact setups. It handles high-definition media streaming and large file transfers efficiently. This networking option is essential for developers who need reliable connectivity in small form factor projects.
Who is the best user for this carrier board?
This board is best for developers integrating the CM4 into custom projects. It is also suitable for those evaluating the module in small spaces. The compact design helps those who need a solution that matches the CM4 size. It is not intended for general consumers. It targets users building specific hardware solutions rather than buying a complete computer.
How heavy is the Waveshare CM4 Nano Base Board?
The board weighs 0.71 ounces. This light weight is beneficial for portable or suspended installations. It does not add significant mass to your project. The lightweight design complements its small physical footprint. You can mount it easily without needing heavy-duty supports. It is a minimal addition to your overall build weight.
Can I use this board with other Raspberry Pi modules?
The listing specifies it is designed for the Compute Module 4. It shares the exact same footprint as the CM4. Therefore, it is optimized for that specific module. Using other modules may not fit or connect properly. You should verify compatibility with your specific CM4 variant. The design focuses on matching the CM4 dimensions precisely.
What is the primary advantage of this base board?
The primary advantage is its compact size. It matches the CM4 footprint exactly. This allows for integration into very tight spaces. The small dimensions make it ideal for custom enclosures. You can build smaller projects without sacrificing connectivity. The Gigabit Ethernet port adds functionality without increasing the board size significantly.