Guard against idle mode only methods?

[caternuson]

Some commands only work in idle mode, altitude for example:

This can lead to potentially unexpected hiccups in user code:

>>> scd4x.altitude = 42
>>> scd4x.altitude
42
>>> scd4x.start_periodic_measurement()
>>> scd4x.altitude
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "adafruit_scd4x.py", line 284, in altitude
  File "adafruit_scd4x.py", line 307, in _send_command
OSError: [Errno 5] Input/output error
>>> 

Could just catch this in user code, but might be better to handle this more gracefully here in driver code?

[ladyada]

ermm maybe throw an exception so at least they know what happened?

[caternuson]

like just catch the OSError here and throw something else with a more helpful message?

[ladyada]

yaz

[caternuson]

Fixed with #13.