04 HDUART

HDUART Mode (Half-Duplex UART)

This mode enables half-duplex UART communication, where TX and RX share a single data line.

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🧩 Commands

Command	Description
bridge	Starts a half-duplex bridge session; input/output share a single pin
config	Configure pin, baud rate, data bits, parity, stop bits, and inversion
[0x01 D:10 r:255]	Execute custom instruction sequences using HDUART bytecode syntax

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📝 Notes

• The bridge command provides real-time communication. Press any ESP32 button to stop.
• config allows you to select the shared TX/RX pin and adjust UART parameters:
  • Baud rate
  • Data bits (5–8)
  • Parity (None, Even, Odd)
  • Stop bits (1 or 2)
  • Inverted logic if needed
• HDUART instructions ([0x... D:N r:N]) give full control over transmitted bytes, delays, and response length.
• Since TX and RX share the same line, timing and collisions must be managed carefully.

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📌 Example Usage

mode hduart
config                    # Select pin, baud, data bits, etc.
bridge                    # Start interactive session
[0x01 D:10 r:255]         # Send 0x01, wait 10ms, read 255 bytes