PhysicalTrafficLightSelector

selectors. PhysicalTrafficLightSelector

Selects a physical traffic light to use.

Constructor

(package) new PhysicalTrafficLightSelector(optionsopt)

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Selects a physical traffic light to use. Checks-out and uses a specific traffic light or the first available one to issue commands.

Parameters:
Name Type Attributes Description
options object <optional>

Options.

Properties
Name Type Attributes Description
manager physical.DeviceManager <optional>

The Device Manager to use.
serialNum string | number <optional>

The serial number of the traffic light to use, if available. Cleware USB traffic lights have a numeric serial number.

Extends

  • EventEmitter

Methods

close()

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Called to close this instance and to stop monitoring for devices. Should be done as the last operation before exiting the process.

logInfo(loggeropt)

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Logs information about known devices.

Parameters:
Name Type Attributes Default Description
logger object <optional>
 console

A Console-like object for logging.

resolveTrafficLight() → {physical.PhysicalTrafficLight}

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Retrieves a traffic light for exclusive usage of the caller, or null if one could not be found or checked-out. Traffic lights are released (checked-in) when disconnected.

Returns:
  • A traffic light, or null.
Type
physical.PhysicalTrafficLight

Events

disabled

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Traffic light disabled event. Only fired if the specific traffic light that was checked-out was disconnected.

enabled

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Traffic light enabled event. Only fired if there's currently no checked-out traffic light.