WeDo2Motor

WeDo2Motor

Manage power, direction, and timers for one WeDo 2.0 motor.

Constructor

new WeDo2Motor(parent, index)

Construct a WeDo 2.0 Motor instance.

Parameters:
Name Type Description
parent WeDo2

the WeDo 2.0 peripheral which owns this motor.
index int

the zero-based index of this motor on its parent peripheral.

Classes

BRAKE_TIME_MS

Members

(private) _direction :number

This motor's current direction: 1 for "this way" or -1 for "that way"

Type:
  • number

(private) _index :int

The zero-based index of this motor on its parent peripheral.

Type:
  • int

(private) _isOn :boolean

Is this motor currently moving?

Type:
  • boolean

(private) _parent :WeDo2

The WeDo 2.0 peripheral which owns this motor.

Type:

(private) _pendingTimeoutDelay :Object

The delay/duration of the pending timeout.

Type:
  • Object

(private) _pendingTimeoutId :Object

If the motor has been turned on or is actively braking for a specific duration, this is the timeout ID for the end-of-action handler. Cancel this when changing plans.

Type:
  • Object

(private) _pendingTimeoutStartTime :Object

The starting time for the pending timeout.

Type:
  • Object

(private) _power :number

This motor's current power level, in the range [0,100].

Type:
  • number

direction

direction

isOn

pendingTimeoutDelay

pendingTimeoutStartTime

power

power

Methods

(private) _clearTimeout()

Clear the motor action timeout, if any. Safe to call even when there is no pending timeout.

(private) _setNewTimeout(callback, delay)

Set a new motor action timeout, after clearing an existing one if necessary.

Parameters:
Name Type Description
callback function

to be called at the end of the timeout.
delay int

wait this many milliseconds before calling the callback.

startBraking()

Start active braking on this motor. After a short time, the motor will turn off.

turnOff(useLimiteropt)

Turn this motor off.

Parameters:
Name Type Attributes Default Description
useLimiter boolean <optional>
 true

if true, use the rate limiter

turnOn()

Turn this motor on indefinitely.

turnOnFor(milliseconds)

Turn this motor on for a specific duration.

Parameters:
Name Type Description
milliseconds number

run the motor for this long.