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