Passive Buzzer Module

Passive buzzer driven by PWM frequency. Produces tones at specified frequencies. 3.3V-5V GPIO controlled.

Actuator BUZZER-PASSIVE buzzer pwm Draft

This entry is draft and has not been confirmed against physical hardware. A conforming tool will refuse to provision it. The datasheet is the authority, not this page.

Specifications

Protocol pwm
Model number BUZZER-PASSIVE
Actuator type buzzer
Command topic suffix command/buzzer
Response topic suffix response/buzzer

Commands

CommandArgumentRangeDescription
BEEP none - Single short beep
ALARM none - Continuous alarm tone
TONE frequency 100 to 5000 Hz Play tone at specified frequency and duration. Payload: frequency in Hz and duration in ms
OFF none - Stop buzzer

Wiring

PinRequiredNotes
signal Yes Requires a square wave at the desired pitch.

Supply: 3.3V or 5V

Failure modes

  • Produces no sound from a steady level. It must be driven with a square wave at the target frequency.
  • Software PWM jitters under load and the pitch wavers audibly. Hardware PWM channels are limited and are shared with other peripherals.
  • Drive current at the top of its range exceeds a GPIO pin. Loud operation needs a transistor.

Entry

Keybuzzer-passive
StatusDraft
Revision1
Registry0.3.0
Entry on GitHub JSON for agents

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