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Value: Integer, the number of seconds we'll poll the environment sensors and
update the database with the new information.

Default: C<15>

=head3 event_action_timer

Value: Integer, representing the interval (seconds) that the server will read
the current state of the system, and will enable/disable any functional GPIO
pins.

Default: C<3>

=head3 event_display_timer

Value: Integer, representing the interval (seconds) that the client UI will
automatically refresh the page (asynchronously).

Default: C<4>

=head3 time_zone

Value: A time zone as accepted by L<DateTime>'s C<new()> method's C<time_zone>
parameter.

Default: C<America/Edmonton> (MST)

=head3 testing

Value: Bool. True (C<1>) to enable testing. We will mock out all portions that
are non-Perl in order to allow for unit test runs on non-Pi boards. Set to False
(C<0>) to disable this and run in normal mode.

Default: C<0>

=head3 debug_sensor

Value: Bool. True to have the L<RPi::DHT11> hygrometer sensor print out debug
information.

Default: C<0>

=head3 log_file

Value: String, a filename to use to log to. By default, if logging is enabled,
we log to C<STDOUT>.

Default: C<""> (empty string, ie. no file)

=head3 debug_level

Value: Integer, C<-1> through C<7>. Sets the debug logging level.

Default: C<-1> (off)

=head3 devel

Value: Bool. True to signify that this is not a production system, False to
signify it is.

When enabled, the UI's time/date bar's background colour will change to red for
easy identification of a development system.

Default: C<0> (off)

=head2 CONTROL CONFIGURATION SECTION

The C<control> configuration section specifies parameters for specific actions
within the system.

=head3 temp_limit

Value: Integer. A limit (in Farenheit), that when the temperature goes above,
the colour of the temperature in the UI will change from green to
red, and we'll enable the assoiated GPIO pin, if set.

Default: C<80>

=head3 humidity_limit

Value: Integer. A limit, that when the humidity goes below, the colour of the
humidity in the UI will change from green to red, and we'll enable the assoiated
GPIO pin, if set.

Default: C<20>

=head3 temp_aux_on_time

Value: Integer (seconds). This is the minimum length of time that the auxillary
associated with the temperature limit reached event will remain on once turned
on. Setting this to a reasonable number will prevent repeated on/off events
if the temperature fluctuates right around the limit.

Default: C<1800> (30 minutes)

=head3 humidity_aux_on_time

Value: Integer (seconds). This is the minimum length of time that the auxillary
associated with the humidity limit reached event will remain on once turned
on. Setting this to a reasonable number will prevent repeated on/off events
if the humidity fluctuates right around the limit.

Default: C<1800> (30 minutes)

=head3 temp_aux

Value: String, in the form C<auxN>, where C<N> is a value from 1-8. This
specifies that we'll associate that auxillary (an auxillary represents a GPIO
pin) to the temperature button in the UI, and the temperature limit reached
event.

Default: C<aux1>

=head3 humidity_aux

Value: String, in the form C<auxN>, where C<N> is a value from 1-8. This
specifies that we'll associate that auxillary (an auxillary represents a GPIO
pin) to the humidity button in the UI, and the humidity limit reached event.

Default: C<aux2>