What Is an SDK? Software Development Kits Explained for Robotics.

What Is a Software Development Kit?

A software development kit, or SDK, is a collection of tools, libraries, documentation, and other resources that help developers build software for a particular platform, device, or service.

SDKs are commonly provided by hardware manufacturers and software companies.

For example, a robotics manufacturer may provide an SDK allowing developers to send commands to a robot, read sensor measurements, or integrate the machine with other applications.

The SDK reduces the need to create every connection and software function from scratch.

Key Takeaways

• SDKs provide resources for developing applications on a supported platform.
• They may include APIs, libraries, examples, debugging tools, and documentation.
• An SDK can simplify development, but compatibility and capabilities depend on the provider.

How Does an SDK Work?

Imagine a company purchasing a robotic arm for a custom inspection application.

The company wants its software to tell the robot where to move and receive information about the robot's status.

Without a development interface, engineers might need to implement communication methods directly.

An SDK can provide software functions that simplify these interactions.

For example, a developer may call a library function to request a robot's current joint positions.

The SDK handles parts of the underlying communication and data formatting.

This allows the team to spend more time building the inspection workflow.

However, the SDK only supports the capabilities and interfaces made available by the provider.

What Does an SDK Typically Include?

APIs: Defined interfaces for accessing functions and information.

Libraries: Reusable software for common tasks.

Documentation: Instructions describing how the platform works.

Code examples: Demonstrations of supported operations.

Development tools: Utilities for building, testing, or debugging applications.

Simulator or emulator support: Tools for testing certain functions without physical hardware.

Not every SDK includes all these elements.

SDK vs. API

An API defines how software interacts with a system.

An SDK is a broader development package that may contain APIs alongside libraries, examples, and tools.

For example, a robot's API may define a function for reading joint states.

Its SDK may include a client library, installation instructions, error-handling examples, and test applications using that function.

An API can exist without a complete SDK.

SDK vs. ROS 2

ROS 2 is an open-source robotics framework and ecosystem.

An SDK is usually a development package associated with a particular platform or product.

For example, a robot manufacturer may provide a ROS 2 package or SDK that exposes its hardware functions.

The two can work together.

Using ROS 2 does not automatically provide access to every proprietary function of a robot.

Why Do SDKs Matter for Physical AI?

Robotics developers integrate hardware and software from multiple sources.

A well-designed SDK can make a camera, accelerator, or robot easier to use.

For example, NVIDIA provides robotics development tools and libraries through its Isaac ecosystem.

Developers can use compatible components for perception and other robotics workloads.

However, SDKs can also introduce dependencies on particular hardware, software versions, or vendor interfaces.

Frequently Asked Questions

Is an SDK always free?

No. Some are open-source, while others are proprietary or subject to commercial licensing.

Can an SDK be used without the physical robot?

Sometimes. Providers may offer simulators, mock interfaces, or development tools that work without the hardware.

The Bottom Line

SDKs help developers create applications using supported hardware and software platforms. They are important in robotics because integration effort often determines how quickly a useful application can be developed.