A dummy no-op handler. Useful for restoring old sessions for introspection.
Resets the meter state and adds an observer.
Close the handler.
Unassigns this handler and returns & assigns a dummy copy.
Shorthand for the meter's ID.
Initialize the handler. Includes the opening of any associated ports and setting port parameters.
Power on the meter channel. After this call the channel should be powered off.
Power on the meter channel. After this call the channel should be powered on.
Toggle the power on the meter channel. After this call the channel should be in reverse state (on <-> off).
Start receiving data.
Shorthand for the meter's state.