96de824f61
Added 'play_sound' CLI command; improved ACC_CALIBRATION_FAIL sound (to make it less like ACC_CALIBRATION sound).
64 lines
3.6 KiB
Markdown
64 lines
3.6 KiB
Markdown
# Buzzer
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Cleanflight supports a buzzer which is used for the following purposes:
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* Low and critical battery alarms (when battery monitoring enabled)
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* Arm/disarm tones (and warning beeps while armed)
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* Notification of calibration complete status
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* TX-AUX operated beeping - useful for locating your aircraft after a crash
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* Failsafe status
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* Flight mode change
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* Rate profile change (via TX-AUX switch)
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If the arm/disarm is via the control stick, holding the stick in the disarm position will sound a repeating tone. This can be used as a lost-model locator.
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There is a special arming tone used if a GPS fix has been attained, and there's a "ready" tone sounded after a GPS fix has been attained (only happens once). The tone sounded via the TX-AUX-switch will count out the number of satellites (if GPS fix).
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The CLI command `play_sound` is useful for demonstrating the buzzer tones. Repeatedly entering the command will play the various tones in turn. Entering the command with a numeric-index parameter will play the associated tone.
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Available buzzer tones include the following:
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RX_LOST_LANDING Beeps SOS when armed and TX is turned off or signal lost (autolanding/autodisarm)
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RX_LOST Beeps when TX is turned off or signal lost (repeat until TX is okay)
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DISARMING Beep when disarming the board
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ARMING Beep when arming the board
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ARMING_GPS_FIX Beep a special tone when arming the board and GPS has fix
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BAT_CRIT_LOW Longer warning beeps when battery is critically low (repeats)
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BAT_LOW Warning beeps when battery is getting low (repeats)
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RX_SET Beeps when aux channel is set for beep or beep sequence how many satellites has found if GPS enabled
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DISARM_REPEAT Beeps sounded while stick held in disarm position
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ACC_CALIBRATION ACC inflight calibration completed confirmation
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ACC_CALIBRATION_FAIL ACC inflight calibration failed
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READY_BEEP Ring a tone when GPS is locked and ready
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ARMED Warning beeps when board is armed (repeats until board is disarmed or throttle is increased)
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Buzzer is enabled by default on platforms that have buzzer connections.
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## Types of buzzer supported
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The buzzers are enabled/disabled by simply enabling or disabling a GPIO output pin on the board.
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This means the buzzer must be able to generate its own tone simply by having power applied to it.
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Buzzers that need an analog or PWM signal do not work and will make clicking noises or no sound at all.
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Examples of a known-working buzzers.
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* [Hcm1205x Miniature Buzzer 5v](http://www.rapidonline.com/Audio-Visual/Hcm1205x-Miniature-Buzzer-5v-35-0055)
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* [5V Electromagnetic Active Buzzer Continuous Beep](http://www.banggood.com/10Pcs-5V-Electromagnetic-Active-Buzzer-Continuous-Beep-Continuously-p-943524.html)
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* [Radio Shack Model: 273-074 PC-BOARD 12VDC (3-16v) 70DB PIEZO BUZZER](http://www.radioshack.com/pc-board-12vdc-70db-piezo-buzzer/2730074.html#.VIAtpzHF_Si)
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## Connections
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### Naze32
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Connect a supported buzzer directly to the BUZZ pins. Observe polarity. Also if you are working with flight controller outside of a craft, on a bench for example, you need to supply 5 volts and ground to one of the ESC connections or the buzzer will not function.
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### CC3D
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Buzzer support on the CC3D requires that a buzzer circuit be created to which the input is PA15.
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PA15 is unused and not connected according to the CC3D Revision A schematic.
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Connecting to PA15 requires careful soldering.
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See the [CC3D - buzzer circuit.pdf](Wiring/CC3D - buzzer circuit.pdf) for details.
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