# Limitations

# Unsupported controllers

• Ruida-based CO2 lasers.
• Galvo fiber lasers with EZCad/BJJCZ controllers, which use an entirely different protocol.
• Marlin-based machines, which have no character-counting buffer and no real-time commands.

# AtomStack Atelier unlock

The AtomStack Atelier ships locked. It has to be connected once through LightBurn or LaserGRBL, which perform the unlock handshake on their first connection; after that, pygrbl-streamer connects and drives it like any other tested machine. The library does not perform that unlock handshake itself.

# AtomStack Swift

The Swift's serial handshake and homing sequence (the handshake example) were verified with a standalone script, not through this library's API. Swift engraving, pause/resume and its receive-buffer capacity are unverified.

# No job resumption

A stopped, alarmed or disconnected job cannot be continued. stop() and reset() flush the controller's buffers, and reconnect() establishes a new session, not a continuation of the old motion. The application decides how to recover an interrupted job.