Driver compatible with 2.0 Espressif firmware#21

Merged

geky merged 2 commits intoARMmbed:masterfrom

sarahmarshy:firmware-v2.0

Apr 10, 2017

Commits on Apr 4, 2017

Driver compatible with 2.0 Espressif firmware.
sarahmarshy
committed

Commits on Apr 10, 2017

Style changes
sarahmarshy
committed