Extra features

Camera trigger output

a servo output can be dedicated to trigger a camera button. A servo travel pattern is defined in this case , see Config.h

ESCsCalibration

Introduction

If the ESCs of the copter need calibration, a special version of MultiWii? can be built, that does nothing but trying to calibrate all attached ESCs. This may come in handy when plugging/unplugging of the cables is undesirable or near impossible (soldered cables)

How To

* remove props or tie copter down.
* setup all options in config.h to whatever suits your copter
* activate the define ESC_CALIB_CANNOT_FLY, possibly set high and low values for ESC calibration, if you know what you are doing
* compile, upload, run --- cannot fly and will use Buzzer/LEDs to indicate finished calibration (after approx 10 seconds)
* comment the define again, compile, upload
* test carefully with your ESCs calibrated, fly and have fun 

Details

If neccessary, the low and high values for the ESCs can be tweaked by changing the values for the defines of ESC_CALIB_LOW and ESC_CALIB_HIGH 2000

Warning

Remove propellers or tie your copter down. Seriously. If for whatever reason this firmware would not make the ESCs enter calibration mode, it would nevertheless send 'full throttle' signals to the ESCs for some time. This is guaranteed to be dangerous.

Buzzer

Introduction

The buzzer is used to give the pilot some feedback of the functions and errors of the MultiWii system.

Table of contents

 # Hardware setup
 # Software setup
 # How it works

Hardware

You need to connect a piezo buzzer or a pilotlamp to the dedicated buzzer port of you FC.

Software

In config.h you need to alter one of the following lines:

1. define BUZZER

1. define PILOTLAMP

to enable the buzzer.

How it works

There are several mandatory and optional beeping patterns to indicate the different states of the MultWii system. The patternn consist of 3 beeps followed by a pause. The length of the beeps and pauses are defined as follows:

* N: None (0ms)
* S: Short (50ms)
* L: Long (200ms)
* D: Double (2000ms)

The beeps are priority driven, the first entry has the highest priority:

# *Failsafe find me signal:* LNN,D (repeat)
# *Failsafe landing active:* SLL,S  (repeat)  
# *GPS RTH/ PH activated without fix:* SSN,S (repeat)   
# *Beeper:* SSS,S (repeat)
# *Runtime Warning:* SSS,N (repeat)  (#define ARMEDTIMEWARNING)
# *Battery voltage warning level 3:* SLL,D (repeat)
# *Battery voltage warning level 2:* SSL,D (repeat)
# *Battery voltage warning level 1:* SLN,D (repeat)
# *RCoptions Toggle:* S   (#define RCOPTIONSBEEP)

Additional beeps

* *Inflight ACC calibration activated:* SS (#define INFLIGHT_ACC_CALIBRATION)
* *Inflight ACC calibration deactivated:* SSS
* *Gyro calibration done:* SSS
* *ACC calibration done:* L
* *LCD Configuration step:* S