RS-232 (Recommended Standard 232) is commonly used in computer serial ports in a point to point communication link. It is a simple and robust solution for low data rate and short range applications.
Data rate
2.4 - 250 kbps
Duplex/Simplex
Full duplex
Connector physical size(WxHxD)
Approx. 17x8.5mm
9 pin DSUB
PHY properties
2/8 wire, positive/negative voltage levels, handshaking option