Quote:
Originally Posted by labatt
SD - I won't go so far as to ask if it uses CTS/RTS for flow control.. I assume it's a bit more modern than XON/XOFF  I can geek too... |
I am pretty sure NMEA 183 does not use CTS/RTS, since it has no lines for that - it only has 3 wires for the connection. CTS/RTS requires a separate wire. It might, in theory, use XON/XOFF, but my experience developing for NMEA devices is that they don't use flow control at all. Since NMEA communication is usually one way (i.e. one device talks, another listens), and there really isn't much data, flow control is pretty much unnecessary.