🔌 Sermonizer

A simple, clean serial monitor with a clean terminal UI for embedded development.

Most terminal-based serial monitors are annoying to use - they have clunky interfaces and no sane defaults. We wanted something that could be quickly spun up to interact with embedded devices during firmware development without any hassle.

Features

• Smart auto-scroll: Follows new data, easy to switch to manual scrolling
• Clean TUI: Split view with input at bottom, output on top
• Auto-detect ports: Just run sermonizer and it finds your device
• Sane defaults: 115200 baud, 8 data bits, no parity, 1 stop bit
• Hex mode: View binary data as hex bytes
• Logging: Save RX/TX data with timestamps
• Fast: Built in Rust, handles high baud rates smoothly

Quick Start

# Install from source (until published to crates.io)
git clone https://github.com/systemscape/sermonizer.git
cd sermonizer
cargo run --release

# Or install locally
cargo install --path .

# Connect to first available port
sermonizer

# Or specify port and baud
sermonizer --port /dev/ttyUSB0 --baud 115200
# Or with cargo run
cargo run --release -- --port /dev/ttyUSB0 --baud 115200

# List available ports
sermonizer --list
# Or with cargo run
cargo run --release -- --list

Usage

sermonizer [OPTIONS]

Options:
  -p, --port <PORT>       Serial port path
  -b, --baud <BAUD>       Baud rate (default: 115200)
      --line-ending <E>   Line ending: none|nl|cr|crlf (default: nl)
      --hex               Display data as hex
      --log <FILE>        Log received data
      --tx-log <FILE>     Log transmitted data
      --log-ts            Add timestamps to logs
      --list              List available ports

Controls

• Type and press Enter: Send data to device
• ↑↓ / Page Up/Down: Scroll through output
• Ctrl+A: Re-enable auto-scroll
• Ctrl+C / Esc: Exit

Why?

Perfect for:

• Arduino/ESP32 debugging
• Firmware development workflows
• Quick embedded device interaction
• Protocol testing and development

License

MIT - see LICENSE file.