iDotMatrix WLED Usermod v0.9.2

Version 0.9.2 improves the iDotMatrix compatibility layer with configurable active/passive buzzer support, persistent Clock preferences, and related configuration and runtime improvements.

Highlights

• Added support for both active and passive buzzers.
• Added configurable passive buzzer trigger polarity:
  • High
  • Low
• Added hardware LEDC tone generation for passive buzzers at 2 kHz.
• Added safe idle-level handling for low-level-trigger passive buzzer modules.
• Added buzzer feedback for:
  • BLE connection
  • Countdown completion
  • Alarm
  • Program / Schedule
• Improved buzzer timing using the ESP32 high-resolution timer to keep sound patterns stable under WLED, BLE, filesystem and media workloads.
• Added Clock preference persistence across reboot.
• Improved the Usermod configuration interface for buzzer settings.

Buzzer support

v0.9.2 contains the buzzer implementation directly inside the iDotMatrix Usermod.

The configuration supports:

• Buzzer GPIO
• Active or Passive buzzer type
• Active-buzzer polarity
• Passive-buzzer trigger polarity
• Test buzzer

Passive buzzer operation uses hardware LEDC at approximately 2 kHz.

Special handling is included for low-level-trigger modules so the GPIO returns to the electrically safe idle state after playback.

Clock persistence

Clock preferences are now persisted and restored during startup before a boot/fallback Clock is rendered.

Persisted settings include:

• Clock style
• 12/24-hour mode
• Show-date option
• Clock color settings

The iDotMatrix reset command also clears the persisted Clock preferences.

Buzzer timing improvements

Alarm and Program / Schedule playback was hardened to avoid timing irregularities caused by media loading and normal WLED loop activity.

On ESP32, buzzer timing uses esp_timer, decoupling sound sequencing from the normal WLED loop and providing stable playback even while other iDotMatrix features are active.