Added Free-running mode

Added Free-running mode

This operating mode makes it possible to only use one processor pin (T1) for operation.

Downsides

• The downside to using this mode is that it is potentially less stable than manually turning it on with an additional GPIO pin.
• Potentially a longer fetch time for the temperature since it might have to re fetch the pulse train. Adding a maximum of 50% longer time compared to the regular modes.
• Requires more power since the sensor is always on, regardless if your checking the temperature or not.

Advantages

• Only requires a single pin of the processor i.e. the counter pin (T1).

Discussion regarding this feature can be found in issue #2

Added MultiCast

Added MultiCast

This operating mode allows multiple NST1001 sensors to connect to the same timer input (T1).

Known issue.

The processor sometimes registers ~3 pulses (-50 C). It rarely happens but worth keeping in mind. I will try to fix this in the future, I'm releasing this now since this is such a rare problem.

First release

First release

This release includes a functional version of the library, only mode of operation is "Pullup" mode.

"Pulldown" mode and "Multicast" will be added in the future.