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Describe visitor actions and live device behavior in concrete language.

Audience and purpose

Pocket Radio is a hands-on exhibit for people exploring ESP32-S3 and Cloudflare Realtime SFU. Visitors can listen, watch the board's spectrum and telemetry, and take turns controlling its LED and playback from a phone or desktop. Developers can inspect how the signals travel and reproduce the project.

Tone and presentation

Keep the language approachable, concise, and curious. Let the board's behavior provide the playfulness. The diagram connects the board and its tasks to the SFU and working audio, spectrum, and control panels. Explanations open beside the selected part. Avoid promotional slogans and decorative browser mockups.

Product constraints

Show measured hardware state and distinguish unavailable readings from zero. Core task names describe assignments; CPU meters show each core's sampled busy percentage. Do not imply that every stream has a separate core or WebRTC connection. Make shared LED/playback changes distinct from personal volume and mute.

Support phones, keyboard navigation, reduced motion, and readable controls. Use text or shape as well as color for signal types and connection state. Visitors can explore the diagram while the board is offline.