Xon/Xoff is a software based flow control method.  Its very simple and is designed for ASCII based comms links.  When enabled the following 2 bytes/characters are sent by the pother side to disable and enable you transmitting: Xoff = Ctrl-S = 0x13 = You must stop sending data Xon = Ctrl-Q = 0x11 = You can start sending data again When […]