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New module suntime for sunrise and sunset time #450

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lorcap
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@lorcap lorcap commented Sep 27, 2021

Approximated calculation of sunrise and sunset time. Adapted from https://github.com/SatAgro/suntime.

Signed-off-by: Lorenzo Cappelletti <[email protected]>
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This looks like a useful addition, however SatAgro/suntime is LGPL which is incompatible with micropython-lib's MIT license...

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lorcap commented Sep 28, 2021

I started from scratch with the formula provided by Wikipedia's Sunrise equation and it works. I'll provide a new clean and neat code under MIT license in the following days.

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lorcap commented Oct 6, 2021

I just pushed a commit with the new module implementation. I rebased it on datetime branch (see PR #449) because it depends on that.

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lorcap commented Oct 31, 2021

Just rebased on top of datetime.

By matching the order of class methods used in Python's datetime, code
changes are easier to implement.

Signed-off-by: Lorenzo Cappelletti <[email protected]>
`timedelta` resolution is now 1 nanosecond, instead of 1 second. The
module is now suitable for logging at microsecond scale and below. As a
bonus, `timedelta` can now handle deltas which span ±292 years (instead
of the previous ±68 years). The cost is 4 more bytes per instance.

Signed-off-by: Lorenzo Cappelletti <[email protected]>
Signed-off-by: Lorenzo Cappelletti <[email protected]>
Signed-off-by: Lorenzo Cappelletti <[email protected]>
When adding a negative integral number of days, time's reminder was lost
and the result was one day less than expected.

Signed-off-by: Lorenzo Cappelletti <[email protected]>
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