Tutorial: How to Build a Robot Sensor Data Recording and Replay System

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A new tutorial published on DEV Community walks developers through building a general-purpose sensor data recording and replay system for robotics projects. The system captures raw sensor streams — including camera feeds, joint positions, torques, and end-effector poses — during teleoperation or autonomous robot runs. Recorded data can later be replayed for debugging policy failures, re-deriving labels, regression testing, or sharing datasets without requiring access to physical hardware. The guide covers multi-threaded recording at native sensor rates with timestamping, and compares storage formats including ROS bags, MCAP, and HDF5. Sample Python code is provided for a modular recorder class and a minimal HDF5 storage backend.

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