mk8/libmodbus — comment on commit 14c5807a41230ca9299f55d2ee569cc1120561bd
File: src/modbus-rtu.c line 287
By stephane:

Could your explain me the principle behind hardware RTS (or give links to documentation), please ?
MODBUS_RTU_RTS _** could be considered software only so don't need to check for RTS_HW ?