Anthropic Opens Claude BLE API, Launches $30 ESP32 Desktop Buddy

3 articles · Updated · CNX Software · May 16

Anthropic released an open-source Claude Desktop Buddy reference project and opened its Claude Hardware Interface, letting ESP32-S3 devices connect directly to Claude desktop apps over Bluetooth Low Energy.
The companion is designed for Claude Cowork and Claude Code on macOS and Windows, showing real-time agent activity and letting users approve or deny permission requests from device buttons instead of returning to the desktop app.
M5StickC Plus is the current supported board — priced around $30 — while Anthropic also highlighted the ESP32-S3-based M5Stack Cardputer as a strong option for developers building AI-linked hardware.
The local BLE setup requires no API keys or internet connection, keeps interactions private, and preserves the project's Tamagotchi-style 'desk pet' behavior with states such as sleep, busy, attention and celebration every 50,000 tokens.
The hardware push expands a feature that began as a hidden Claude Code CLI Easter egg, with code and documentation now on GitHub and support available through both Arduino and Espressif's ESP-IDF stack.

Is the Claude desk pet a novelty, or the first step in a much larger physical AI ecosystem?

How does a local Bluetooth device ensure privacy when the AI's 'brain' still lives in the cloud?

Will Tamagotchi-like AI companions become the next billion-dollar consumer market or just a developer's toy?