Add footprint for E73-2G4M04S-52832 BLE5 module

[isundaylee]

Datasheet: http://www.cdebyte.com/en/downpdf.aspx?id=243 (page 5)

Symbol PR: KiCad/kicad-symbols#573

Screenshot:

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[isundaylee]

I centered the anchor with regards to F.Fab. However the CI seems to be complaining. Should I center it with regards to the copper pads instead?

[poeschlr]

Is it on purpose that the pin numbers start at zero?

[isundaylee]

@poeschlr I was following the pin number in the data sheet. Not clear why it is like that though.

[poeschlr]

The drawing in the datasheet is over constrained. The part can not be both 17.5mm wide while the pads are 1.77mm from the side and the pin pitch is 1.27mm (1.2711+21.77 would be 17.51)

So either we assume that the 1.77mm measurement is rounded (should then be 1.765mm)
Or the with of the part is rounded (and should in reality be 17.51mm)

I would for the former and move all pads on the bottom row to the left by 0.005mm.

[isundaylee]

@poeschlr Thanks for the review! Changed as requested.

[evanshultz]

The pad fix above looks OK to me. Please rename this footprint to just E73-2G4M04S since it's compatible with both 52832 and 52810 versions. Then I think it's ready to merge!

[isundaylee]

@evanshultz Thanks! Renamed as requested.

[evanshultz]

Thank you!