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Yes—you can use a Radxa X4 as the computer for a small ROS 2 car, but this is a custom integration, not an Intel-validated Radxa kit. The X4’s Intel N100 processor is in the Intel N-series family covered by Intel’s documented Ubuntu 22.04 and ROS 2 Humble path. You must still confirm that a suitable Ubuntu image, drivers, ROS packages and workload run correctly on your exact X4 configuration.
What you are building
The X4 handles Linux, ROS 2 nodes, sensors and navigation software. A separate motor controller drives the motors, while a ROS 2 base node translates velocity commands into motor actions and reports feedback. A camera and mapping or navigation stack can be added after the drivetrain works.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
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Radxa CM3S IO Board | $79.99 | Buy on Amazon |
| 2 |
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Radxa NX5 IO Board, Verify Radxa NX5 Functions | $43.00 | Buy on Amazon |
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Intel’s documentation describes compatible software patterns and robot-kit examples; it does not certify the Radxa X4 as a validated robot platform. Treat every hardware, image and driver combination as something to verify on the assembled vehicle.
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| Part | Purpose | Selection or verification point |
|---|---|---|
| Radxa X4 | ROS 2 computer | Intel N100, four cores/four threads; choose the required RAM, wireless and storage configuration. |
| M.2 2230 NVMe SSD | Optional operating-system and data storage | Use the X4’s M.2 M-key slot if the chosen board configuration needs additional storage. |
| Chassis and wheels | Mechanical platform | Leave mounting room for the X4, battery, controller and camera. |
| Motors | Propulsion | Match motor voltage and current to the motor controller, battery and expected load. |
| Motor controller | Power switching and motor control | Use a properly rated controller with encoder support where possible and a ROS 2 driver, or plan to write one. |
| Battery and regulator | Vehicle power | Provide a regulated supply for the X4 and keep high-current motor wiring separate from logic wiring. |
| Camera | Optional perception, depth or mapping input | Verify the exact model’s ROS wrapper, USB bandwidth, power needs and CPU load. |
The X4 exposes a 40-pin header and an RP2040-controlled GPIO system with PWM, UART, I2C and SPI functions. Its GPIO is 3.3 V, with a stated tolerance of 3.63 V. GPIO signals do not replace a motor driver: motors must be powered through a suitable controller.
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- Package: 1pcs* (Radxa CM3S IO Board)
Choose the operating-system and ROS 2 release
Intel’s current 2026.1 documentation maps Intel Processor N-series chips (formerly Alder Lake-N) to an Intel IoT Ubuntu 22.04 image and ROS 2 Humble. Its Ubuntu 24.04 and ROS 2 Jazzy path is associated with Intel Core Ultra processors, so do not copy that route for an N100 X4 without separate compatibility evidence.
- Identify the exact X4 board revision, RAM, wireless module and storage.
- Check whether a board-specific Ubuntu 22.04 image is available and usable for that configuration. Radxa also lists Debian and Ubuntu Linux support, but Intel’s processor-family mapping is not Radxa-specific certification.
- Install to the selected storage with a recovery method available. Before installing robotics software, verify booting, networking, USB devices, graphics output and storage reliability.
- Record the installed kernel and Ubuntu release so driver problems can be traced to a known system state.
Install Intel’s ROS 2 software
Use the Intel Robotics SDK documentation for version 2026.1 and select its N-series/Humble installation path. Intel’s current portfolio branding is “Robotics AI Suite,” while the versioned documentation describes the ROS 2 mobile-robot software and examples.
The guide provides an installer as well as a package-installation route. Read the installer’s cleanup behavior before running it: the express installer may remove packages matching patterns related to ROS, OpenVINO, RealSense and Gazebo. Do not run it blindly on a machine that already contains software you need.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →After installation, source the ROS 2 Humble environment in each shell or launch configuration used by the robot. Keep the same ROS_DOMAIN_ID on the X4, the base controller computer and any remote teleoperation computer; mismatched domain IDs prevent nodes from discovering one another.
Build the mobile base before adding autonomy
Wire power and control safely
Use a battery and regulator designed for the vehicle’s current demands. Radxa lists a 12 V/2.5 A USB-C PD 2.0 input and recommends at least 18 W without USB-consuming devices or 25 W with the full USB-port load, according to its 2024 specifications. Those figures describe board input requirements, not whole-robot battery life. A raw battery should not be connected directly unless an appropriate regulated USB-C PD power design is used.
Keep motor-current paths, switching noise and logic grounds under control. Provide fusing and an accessible power disconnect, and confirm that the regulator remains within voltage limits while motors start, reverse or stall.
Implement the ROS 2 base node
The base node is the contract between navigation software and the hardware. It should:
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- Package Include: 1PCS*【Radxa NX5 IO Board】
- Subscribe to
cmd_velvelocity commands. - Convert those commands into left/right motor-controller commands.
- Read encoder or controller feedback and publish wheel odometry.
- Publish the required
odomtobase_linktransform. - Stop safely when commands time out or the controller reports a fault.
If the selected controller has no suitable ROS 2 Humble node, you will need to create or adapt one. Check message names, units, frame IDs, command limits and encoder polarity before connecting navigation software.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Validate motion in a controlled sequence
- Lift the drive wheels or use a stand so an incorrect command cannot propel the car.
- Confirm that the base node discovers the motor controller and that feedback changes when each wheel is moved.
- Check the sign and scale of wheel commands, encoder counts and odometry.
- Place the vehicle on the floor with an emergency power cutoff available.
- Use Intel’s recommended keyboard teleoperation check. Intel states: “Use the Robot Teleop Using a Keyboard ROS 2 node to validate that the robot kit’s hardware setup has been done correctly.”
- Test forward, reverse, rotation and stop behavior at low speed before attempting mapping or navigation.
Do not proceed to Nav2 merely because motors turn. Incorrect transforms, wheel radius, track width or encoder signs will produce unusable maps and unstable control.
Add cameras, SLAM and navigation in stages
Camera streaming
Intel’s examples include ROS 2 camera streaming with RealSense devices. A depth camera is optional; it is not a mandatory X4 accessory. Confirm the exact camera model, wrapper support on Ubuntu 22.04/Humble, USB bandwidth, cable quality, power budget and processor utilization.
Point clouds and obstacle data
Start by viewing image, depth and point-cloud topics while the car is stationary. Check timestamps, frame IDs and dropped frames. Mount the sensor rigidly and document its transform relative to base_link.
SLAM and Nav2
Run mapping only after odometry and sensor transforms are credible. Then test localization and navigation at low speed in a clear area. Keep an operator able to stop the motors; a functioning ROS graph does not guarantee safe motion.
Thermal, power and placement checks
- Radxa specifies a normal operating range of 0°C to 60°C for the board. Enclose it only with adequate airflow and clearance.
- The factory CPU power limit and N100 TDP are both stated as 6 W by Radxa. These are board or processor specifications, not a sustained performance result for a moving robot.
- USB cameras, storage and wireless peripherals consume part of the available power budget. Recheck regulator headroom after every accessory is added.
- Mount the X4 away from motor heat and vibration, and secure the NVMe drive and cables against movement.
How to choose a chassis and controller
When comparing bases, evaluate the interface rather than choosing by wheel count alone.
| Criterion | Why it matters |
|---|---|
| Motor voltage and current headroom | Prevents controller or regulator overload during starts, turns and stalls. |
| Encoders and feedback quality | Determines whether odometry can support mapping and localization. |
| ROS 2 Humble driver | Reduces integration work and clarifies supported commands and feedback. |
| Payload and mounting area | Must carry the X4, battery, controller and optional camera securely. |
| Regulated board power | Protects the X4 from motor transients and unsuitable battery voltage. |
What success looks like
A useful first milestone is not autonomous driving. It is a repeatable system in which the X4 boots Ubuntu 22.04, ROS 2 Humble nodes discover one another, the base responds safely to cmd_vel, odometry and TF are correct, and teleoperation works without brownouts or overheating. Only then should you add depth processing, SLAM and Nav2.
Quick Recap
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