Small tweak to uart.Conn.
Small tweak to uart.Conn.

Still unused. Should probably interface with something like
https://github.com/tarm/serial.

maruel/dlibox,maruel/dlibox,maruel/dlibox,maruel/dotstar,maruel/dlibox,maruel/dlibox,maruel/dotstar,maruel/dlibox,maruel/dlibox