mirror of https://github.com/ChuckBuilds/LEDMatrix.git synced 2026-05-14 01:23:32 +00:00

Files

Chuck c19df29a21 fix: service control buttons and AP-mode SSH lockout post-install

Two user-reported issues after fresh install:

1. All service buttons (Start/Stop/Restart Display, Restart Web Service)
   failed silently — only Reboot worked.

   Root cause: sudoers rules use `ledmatrix.service` (with suffix) but
   api_v3.py called `sudo systemctl start ledmatrix` (no suffix). sudo
   does exact string matching, so every service action was rejected with
   returncode=1. Also missing from sudoers: ledmatrix-web, journalctl,
   and is-active entries.

   Fix:
   - Add `.service` suffix to all 8 sudo systemctl call sites in
     api_v3.py (_ensure_display_service_running, _stop_display_service,
     and all execute_system_action branches).
   - Add timeout=15 to all subprocess.run calls in execute_system_action
     (previously could hang indefinitely).
   - Add missing sudoers rules to first_time_install.sh and
     configure_web_sudo.sh: ledmatrix-web.service start/stop/restart,
     is-active for both name forms, and journalctl -u/-t ledmatrix rules.

2. SSH and web UI became inaccessible after ~1 hour even though the
   display kept running.

   Root cause: wifi_monitor_daemon restarts NetworkManager after 5
   consecutive internet failures (~2.5 min). Each NM restart drops WiFi
   briefly. During that window check_and_manage_ap_mode() increments
   _disconnected_checks but the daemon never reset it after the restart.
   After 3 such NM-restart cycles, _disconnected_checks reached 3 and
   AP mode activated — changing the Pi from WiFi client to hotspot
   (192.168.4.1) and killing SSH on the old IP.

   Fix:
   - Reset wifi_manager._disconnected_checks = 0 in the daemon
     immediately after a successful NM restart so the brief drop it
     causes doesn't count toward AP-mode activation.
   - Increase _disconnected_checks_required from 3 to 6 (90s → 3min)
     as an additional buffer against transient network flaps.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-05-12 13:26:31 -04:00

cleanup_venv.sh

Plugins (#145 )

2025-12-27 14:15:49 -05:00

clear_cache.py

Plugins (#145 )

2025-12-27 14:15:49 -05:00

clear_python_cache.sh

Plugins (#145 )

2025-12-27 14:15:49 -05:00

README.md

Plugins (#145 )

2025-12-27 14:15:49 -05:00

start_web_conditionally.py

fix(install): resolve install issues and speed up web UI startup (#225 )

2026-01-30 12:08:57 -05:00

wifi_monitor_daemon.py

fix: service control buttons and AP-mode SSH lockout post-install

2026-05-12 13:26:31 -04:00

README.md

Utility Scripts

This directory contains utility scripts for maintenance and system operations.

Scripts

clear_cache.py - Clears LEDMatrix cache data (specific keys or all cache)
start_web_conditionally.py - Conditionally starts the web interface based on config settings
wifi_monitor_daemon.py - Background daemon that monitors WiFi/Ethernet connection and manages access point mode
cleanup_venv.sh - Cleans up Python virtual environment files
clear_python_cache.sh - Clears Python cache files (pycache, *.pyc, etc.)

Usage

Clear Cache

python3 scripts/utils/clear_cache.py --list          # List cache keys
python3 scripts/utils/clear_cache.py --clear-all      # Clear all cache
python3 scripts/utils/clear_cache.py --clear <key>    # Clear specific key

Start Web Interface Conditionally

This script is typically called by the systemd service (ledmatrix-web.service) and checks the web_display_autostart setting in config/config.json before starting the web interface.

WiFi Monitor Daemon

This daemon is typically run as a systemd service (ledmatrix-wifi-monitor.service) and automatically manages WiFi access point mode based on network connectivity.