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What is hardware flow control for serial port?
Hardware flow control at the serial port works like this: The two pins, RTS (Request to send) and CTS (Clear to send) are used. When the computer is ready to receive data it asserts RTS by putting a positive voltage on the RTS pin (meaning “Request To Send to me”).
Which devices could be connected to a serial port?
Serial ports are also used to connect equipment together, e.g. modems of one type or another (PSTN, 3G, satellite), GPS units, telescopes, sensors, power inverters, and many type of industrial control equipment.
How does hardware flow control work?
Hardware flow control uses a dedicated signal wire while software flow control signals by sending Xon or Xoff control bytes in the normal data wire. For hardware flow control, the cable must be correctly wired.
Are serial ports obsolete?
The serial port used to be found on almost all new PC’s but not anymore. Thus as of 2008, it’s becoming obsolete, if not already obsolete. It’s often called a “legacy” device, but it’s still used by some for hardware designed to connect to the serial port especially for computers used as servers by companies.
What do you need to know about serial ports?
For serial ports this means the ability to stop and then restart the flow without any loss of bytes. Flow control is needed for modems and other hardware to allow a jump in instantaneous flow rates.
What kind of flow control does a serial port need?
Flow control is needed for modems and other hardware to allow a jump in instantaneous flow rates. For example, consider the case where you connect a 33.6k external modem via a short cable to your serial port. The modem sends and receives bytes over the phone line at 33.6k bits per second (bps).
Which is the best software to control serial devices?
232Analyzer is an Advanced Serial Port Protocol Analyzer software, which allows you to control / debug, monitor / sniff serial devices (RS-232 / RS-485 / RS-422 / TTL) right from your PC. 232Analyzer is a shareware, the FREE version has some limitation but is more than enough to test and control your serial devices.
What do you need to know about serial port sniffer?
What is an RS232 sniffer? Serial Port Sniffer is a specialized system utility that captures serial data packets transferred by another program to a serial app or device over an RS232 interface. With an efficient sniffer tool, you can monitor the activity of any COM port in your system.