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RS-232 is a simple serial communication standard in which one bit of data is transmitted at a time over a serial cable at the relatively slow rate of up to 20K bits/second and distances up to 50-ft. By specifying the voltage, signaling, pin wiring and control data between a host device and a peripheral, the RS-232 standard ensured that devices from different manufacturers could communicate with each other.
The RS-485 standard was published in 1983 and is substantially similar to the earlier RS-422 standard. The big difference is support for multiple transmitters and receivers, allowing devices connected on an RS-485 network to "talk amongst themselves" in half-duplex mode over inexpensive twisted pair cabling. RS-485 describes the electrical characteristics of the drivers and receivers but does not specify a communication protocol. A USB to serial adapter that uses the FTDI chipset. The chipset manufacturer, Future Technology Devices International (FTDI), is a Scottish semiconductor company specializing in USB interfaces.Some devices will only connect to your computer using a port called "RS232 Serial Port". This port was used on old computers before 2003. Yes, a RS232 to USB converter does have a full-blown UART circuit built-in. As any standard UART, it does have Rx, Tx, and flow control pins. As any UART, it must be properly configured to be able to communicate with the "partner" at the other end of UART link. Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 2012 R2, Windows 2016, Windows 2008 R2
Baud rate is the data transmission speed measured in bits per second. It defines the frequency of each bit period. For a baud rate of 2400 (2400 bps), the frequency is 2400Hz and the bit period is 1/2400. This is the information that a receiver uses to recover the bits from the data stream.Serial ports rely on a microcontroller chip called a Universal Asynchronous Receiver Transmitter (UART) to "serialize" the data coming from the host computer's bus so it can be transmitted through the serial port. Serializing means transforming bytes of data into a sequence of bits with start and stop bits on either end. On the receiving end, another UART chip reconverts the serialized data into "parallel" bytes. Most UART chips cache data coming in from the computer bus so they can transmit faster than the normal 115 Kbps transmission rate of a standard serial port. You just easily hook the cable into PC or Hub’s port, and it can connect any RS-232 devices, such as PDA, scanner, printer etc. Bear in mind that some devices may need an additional software for proper operation.
Serial cables can also be used to connect two DTEs together but the pins must be wired so transmitter pins are connected to receiver pins. Cables that use this "crossover" wiring are known as null modem cables. Standard RS232 cables connect a DTE (Data Terminal Equipment) such as a desktop computer to a DCE (Data Communications Equipment), typically a modem, printer or special-purpose peripheral. These "straight through" serial cables connect pins on the sending device to the same pins on the receiving device (e.g. pin 1 to pin 1, pin 2 to pin 2 and so on). Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 2012 R2, Windows 2008 R2 Verify RS232 device is connected to COM PORT number between 1 to 4. This is a MUST, else it will not work.
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RS-422 was used with a smaller 8-pin mini-DIN connector on early Apple Macintosh computers to connect to AppleTalk networks and various peripherals. RS-422 is also found on professional video broadcasting equipment. However in 95% of cases, it will fail to automatically install the drivers. So you have to install drivers manually. COM port is another name for a serial port on a computer. Computers no longer have COM port but the driver for a serial to USB adapter may create a virtual COM port so a legacy serial device can connect to the computer. If install STILL failed to install the drivers or above "Prolific..." device has a yellow triangle next to it, then: Install the driver file from the disc that came with the RS232 Device.
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