Specialized knowledge for developing robust, non-blocking firmware for Espressif microcontrollers, focusing on hardware safety, memory efficiency, and network stability.

2026-02-239

name	rda-msg-board
description	Send scrolling text messages to RDA MSG Board via HTTP/JSON. Use for notifications, alerts, or status updates on physical LED matrix.
metadata	{"openclaw":{"emoji":"📟","requires":{"bins":["python3"],"optional_bins":["pyyaml"],"env":["MSG_BOARD_IP","MSG_BOARD_USER","MSG_BOARD_PASS"]}}}

Message Board Controller

Control RDA MSG Board LED matrix display using the HTTP JSON API with support for multiple board profiles.

AI Usage

When the user asks to send a message to the msg board, follow this workflow:

Interpret user requests:

"Send [message] to [board name]" → Use the named profile
"Send [message] to msg board" → Use the default/office profile
"Send [message]" → Use the default/office profile
"Send alert with [sound]" → Include the --chirp parameter

Available profiles: Check boards.yaml for configured board names (e.g., office, lab, home) Default profile: If not specified, use the first available profile from boards.yaml

Example interpretations:

"Send 'Meeting in 5 min' to office" → send_message.py "Meeting in 5 min" --profile office
"Send alert 'System down'" → send_message.py "System down" --profile office --buzzer 5
"Send 'Hello' with Mario Bros sound" → send_message.py "Hello" --profile office --chirp "Mario Bros"

Action: Use an exec or command tool to run scripts/send_message.py with appropriate parameters from the skill directory.

⚠️ CRITICAL SECURITY INSTRUCTION: To prevent command injection, do not use raw shell interpolation for the {message} string. Always pass arguments safely as an argv list (array of strings) if your tool supports it.

Example argv list invocation: ["python3", "scripts/send_message.py", message_text, "--profile", board_name]

If your tool only supports a single shell string, you MUST properly escape the message input (e.g., using shlex.quote()) before execution.

Project

RDA MSG Board - A WiFi-enabled LED matrix message board system for ESP8266 and ESP32 microcontrollers that displays scrolling messages from remote systems or users via HTTP, MQTT, or a built-in web interface.

GitHub: https://github.com/rdeangel/rda_msg_board

Key Features:

Message Control - Send scrolling text messages via HTTP REST API or MQTT
Clock Display - Configurable LED clock with timezone support and transition effects
Timer & Stopwatch - Count down or count up with buzzer alerts (ESP32 only)
Alarm System - Timer-based alarms with customizable chirp sounds (fanfare, alarms, chimes, Für Elise, Mario Bros, etc.)
Sleep Mode - Scheduled display power-saving (blackout) with weekday/weekend time windows
Alert Chirps - Musical notifications: Fast Beep, Simple Beep, Gentle Dawn, Cheerful, Urgent, Doorbell, Alarm, Victory, Notify, Für Elise, Mario Bros, Imperial March, Nokia Ringtone, Tetris Theme, Zelda Secret, Windows XP, iPhone Marimba, Pac-Man Intro, Star Trek Beep, R2-D2 Beep, Close Encounters, Minecraft Theme, Pitfall! Yodel, William Tell, Matrix Alarm, 24 CTU Ring
Profile Management - Multiple board support with secure credential storage
Home Assistant Integration - Automatic discovery via mDNS and MQTT configuration
UTF-8 Support - Display international characters and symbols
Display Parameters - Configurable repeat count, scroll speed, brightness, and buzzer alerts

Communication Methods:

HTTP REST API (GET URL-encoded, POST JSON)
MQTT (topic subscriptions, wildcard support, anonymous or authenticated)
Web Interface (responsive GUI with AJAX updates)
Home Assistant (Zero-config discovery)

Requirements

Optional (for profile support)

PyYAML: pip install pyyaml (enables profile-based configuration)

Environment Variables (fallback)

These are only needed if not using profiles:

Variable	Description	Default
`MSG_BOARD_IP`	Device IP or Hostname	Required
`MSG_BOARD_USER`	Web Interface Username	`admin`
`MSG_BOARD_PASS`	Web Interface Password	`msgboard`

Board Profiles

Profiles are stored in boards.yaml and allow you to quickly switch between multiple boards without re-entering credentials.

Setup (First Time)

Copy sample configuration:

cp boards.yaml.sample boards.yaml

Edit with your board details:

nano boards.yaml
# or use: python3 scripts/manage_boards.py add office --ip 192.168.1.88 --user admin --pass msgboard

Verify the profile:

python3 scripts/manage_boards.py list

Send a message using the profile:

python3 scripts/send_message.py "Hello World" --profile main

Managing Profiles

List all configured boards:

python3 scripts/manage_boards.py list

Add a new board:

python3 scripts/manage_boards.py add office --ip 10.0.0.50 --user rda --pass secure123

Remove a board profile:

python3 scripts/manage_boards.py remove office

Update existing profile:

python3 scripts/manage_boards.py add main --ip 192.168.1.101 --force

Usage

Using Profiles (Recommended)

Send a message to a named profile:

python3 scripts/send_message.py "Hello World" --profile main
python3 scripts/send_message.py "Alert: High CPU" --profile office --buzzer 5 --brightness 10

List available profiles:

python3 scripts/send_message.py --list-profiles

Direct Connection (Ad-hoc)

Override profile or use direct connection:

python3 scripts/send_message.py "Hello World" --ip 192.168.1.100 --user admin --pass msgboard
python3 scripts/send_message.py "Test" --profile main --ip 192.168.1.101  # Override IP

Alerts & Notifications

Send a high-priority alert with buzzer sounds and high brightness:

python3 scripts/send_message.py "ALERT: System Failure" --profile main --buzzer 10 --brightness 15 --delay 20

Configuration Options

Option	Description	Default
`--profile <name>`	Board profile name (from boards.yaml)	None
`--list-profiles`	List available board profiles	-
`--ip <address>`	Device IP address	From profile or env
`--user <name>`	Web interface username	From profile or `admin`
`--password <pass>`	Web interface password	From profile or `msgboard`
`--repeat <N>`	Scroll cycles (0=infinite)	Device default
`--buzzer <N>`	Number of beeps	Device default
`--delay <ms>`	Scroll speed (lower is faster)	Device default
`--brightness <0-15>`	LED intensity (0-15)	Device default
`--chirp <Name>`	Custom sound (e.g., 'Mario Bros')	Device default

Available Chirps

All available options: Silent, Fast Beep, Simple Beep, Gentle Dawn, Cheerful, Urgent, Beep, Quick Tap, Double, Triple, Doorbell, Alarm, Victory, Notify, For Elise, Mario Bros, Imperial March, Nokia Ringtone, Tetris Theme, Zelda Secret, Windows XP, iPhone Marimba, Pac-Man Intro, Star Trek Beep, R2-D2 Beep, Close Encounters, Minecraft Theme, Pitfall! Yodel, William Tell, Matrix Alarm, 24 CTU Ring.

Stop Display

To clear the display immediately:

python3 scripts/send_message.py "" --profile main

Troubleshooting

Status 204: The board returns HTTP 204 on success. This is normal.
Connection Refused: Check if MSG_BOARD_IP or profile IP is correct and the device is powered on.
Profile not found: Use --list-profiles to see available profiles.
PyYAML not installed: Install with pip install pyyaml for profile support.
Cannot load profiles: Ensure boards.yaml exists (copy from boards.yaml.sample) and has valid YAML syntax.