ObstructionPoller (ElevatorProject v0.1.0)

Monitors the state of the obstruction switch, and signals ElevatorOperator if the state changes.

Uses the following modules:

  • Driver
  • ElevatorOperator

Link to this section Summary

Functions

Returns a specification to start this module under a supervisor.

Calls ElevatorOperator.obstruction/1 with the current obstruction switch state if the state changes.

Link to this section Functions

Link to this function

child_spec(arg)

Returns a specification to start this module under a supervisor.

arg is passed as the argument to Task.start_link/1 in the :start field of the spec.

For more information, see the Supervisor module, the Supervisor.child_spec/2 function and the Supervisor.child_spec/0 type.

Link to this function

poller(prev_state)

Calls ElevatorOperator.obstruction/1 with the current obstruction switch state if the state changes.

Parameters

  • prev_state: State of the obstruction switch sensor. Can be :inactive or :active :: atom()

Return

  • no_return