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ROS (Robot Operating System) Fundamentals
The de facto standard middleware for robotics software — nodes, topics, and services that let components communicate.
What it is
ROS (Robot Operating System) is the de facto standard middleware framework for robotics software — not an OS in the traditional sense, but a communication and tooling layer that lets independent software components (nodes) work together.
Key points
- Nodes: independent processes, each typically responsible for one function (a sensor driver, a planner, a controller) — this modularity lets components be developed, tested, and swapped independently.
- Topics (pub/sub): nodes publish and subscribe to named topics for continuous data streams (e.g. sensor readings) — decoupled, many-to-many communication where publishers and subscribers don't need to know about each other directly.
- Services (request/response): for one-off, synchronous request/response interactions (e.g. "reset this sensor") — a different communication pattern than topics, used when you specifically need a reply.
- ROS's real value is the massive existing ecosystem — drivers, algorithms (navigation, perception, manipulation), and tooling that would otherwise need to be built from scratch for every new robotics project.