Serial protocol

Baud: 115200. Lines are ASCII, terminated with \n.

DTR/RTS are held low by the host so opening the port does not reset the ESP32.

Device → host

CMD:<ACTION_ID>
STAT:READY

Example: CMD:CUT

Boot / firmware noise lines (ROM, rst:, [OK], …) are ignored by the bridge.

ACK:<ACTION_ID>
ERR:<ACTION_ID>:<reason>
STAT:BRIDGE_ONLINE
STAT:BRIDGE_OFF

Message	Meaning
`ACK:`	Shortcut injected successfully
`ERR:`	Unknown action, injection failure, or permission error
`STAT:BRIDGE_ONLINE`	Bridge session open
`STAT:BRIDGE_OFF`	Bridge session closed

There is no live Resolve INFO / timecode stream on this protocol.