Scott Shawcroft ee817a2fa8 Correct UART reads to return error on timeout.
This causes read to correctly return None instead of b''.

Fixes #874
2018-06-12 14:03:27 -07:00
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2018-04-13 16:22:28 -07:00
2018-06-08 14:57:20 -07:00
2018-04-23 23:51:23 -04:00