Section
Overview
Protocol
Commands
Reference
AI Access
Transport
USB-serial portThe box enumerates as a USB-serial device, so it appears as an ordinary serial port. Everything travels over that port as raw bytes. Open the port at the fixed baud, then send frames and confirm the box with the handshake.
Serial link
Baud and framingFixed 4,000,000 baud (4 Mbaud), no negotiation. Open the port at that exact baud and start sending bytes; any other baud fails.
The box speaks framed binary from the first byte. There is no legacy startup path:
- No ASCII console.
- No
115200startup step. - No baud-switch frame.
- Baud is never saved on the box, so a bad setting can't lock you out.
USB identity
WCH CH343 bridgeA WCH CH343 chip does the USB-to-serial conversion. Match on its vendor and product IDs to pick the box out from other serial devices.
| Property | Value |
|---|---|
| VID | 0x1A86 |
| PID | 0x55D3 |
| Baud | 4,000,000 |
| Framing | 8N1 |
| Linux path | /dev/ttyACM* |
| Windows path | COMx |
8N1 is 8 data bits, no parity, 1 stop bit.
See Connection for the handshake and Frame Format for the wire format.