stephane/libmodbus — pull request #74 by habu1010 (2012-07-25 08:52:23+00:00)
Title: _modbus_rtu_send problem when using RTS

When using RTS, _modbus_rtu_send can't send large data correctly.

Because in typical unix system, write(2) function returns immediately
and sent data actually by device driver,
RTS activation time is insufficient.

I wrote simple patch that calculate RTS activation time.