Serial Port Configuration Options

  1. Serial Port Setup
  2. Serial Configuration Utility
  3. Tibbo Serial Port Configuration Option
  4. Serial Port Configuration Options Windows 7

In order to set it up, first you have to find it on your computer. Long long ago, almost all computers had two serial ports, called 'COM1' and 'COM2', one a with a nine pin and the other with a 25 pin connector.
Now times have changed and the serial port has vanished.
Don't give up hope, however. The USB to serial converter has arrived, and it can be used instead. It is usually a dongle which plugs into a USB port, with a nine pin male connecter at the other end.
On my desktop computer, the motherboard has two built in serial ports. The third seial port, here labelled COM4, belongs to the USB to serial adapter I have plugged in.
So, to find the serial port on your computer, scout around its back. If you find a nine pin male connector (two rows, five and four, pins sticking out inside a metal shell) it has a serial port built in.
Or get a USB to serial converter and plug it in.
Open up Device Manager. Right click on 'My Computer' and select properties (at the bottom of the list that pops up). Click on the 'Hardware' tab. Click on the 'Device Manager' button and a something similiar to this picture should appear.
Click on the '+' sign on the left of the 'Ports (COM & LPT) to expand it. The list of printer and Serial ports available will be shown. Make a note of those, you will need them in the steps that follow.

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In Windows command prompt to configure a serial port, I can simple use:

For nullmodem: server, rxdelay, txdelay, telnet, usedtr, transparent, port, inhsocket (all optional). Defaults: serial1=dummy serial2=dummy serial3=disabled serial4=disabled An example of how to configure an actual serial port for I/O use: serial1=directserial realport:com1. To configure the Serial Port for your device, on your computer go to Control Panel - Device Manager, select “ High-Speed USB Serial Port (Com X)”, right click and select Properties. Click the Features tab. Features Tab This tab is used to change the COM port number and configure the port.

Serial port configuration options 2017

Serial Port Setup

or to read the configuration:

Are there similar commands in Linux? What would be the easiest way to find and configure the serial port in Linux?

Hrvoje THrvoje T
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1 Answer

You can use the stty command to set such parameters.

This will show all settings on the first serial port (replace ttyS0 with ttyUSB0 if using an USB serial port):

Serial Configuration Utility

This will set the baud rate to 9600, 8 bits, 1 stop bit, no parity:

One thing that generally confuses people is that most serial drivers will reset the settings to the defaults once the device is closed (i.e. no process has the device open anymore). So the above stty command will set the settings, then when it's done the driver resets them again. If you first have your POS software open the device and then perform the stty settings, they should stick around until your POS software closes the device again (e.g. upon exiting).

Tibbo Serial Port Configuration Option

I'd have thought that the POS software should have some way of configuring these settings on its own. If you're writing your own software to drive the printer, make sure you first open the device, and then perform the stty command.

You may also need to play around with other settings, e.g. opost means that output postprocessing will be performed. If opost and onlcr are both set, the onlcr will cause an extra carriage return (0xd) to be added when a newline (0xa) byte is output, typically to prevent staircase printing such as

This may or may not be what you want. If you want a raw one-to-one output to the printer turn opost off (add -opost to the stty parameters).

Handshaking (flow control) is also controlled with stty, without knowing more about the printer I can't tell whether you need to set anything.

Check the stty manpage for lots more info.

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Serial Port Configuration Options Windows 7

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