Com1 stops and starts

you lost the case to it, it was , or buy ***** motherboard?
- Compaq Presario SR5130NX !!! 12 years old I think. 2007
what are you doing , ?
why need any RS232 COM1 port or relic LPT 25pin port
can you tell why first? and this does not exist here.
(sure with add-in cards or USB dongles on any PC)

that PC is old, Compaq ran for many years and HP killed it 2013. ONLY HP.com support it today, ok?
I see you reading the mobo numbers top center
desktop OLD. and top CPU is.
Core 2 Duo E4x00 with Dual Core technology (Conroe) up to E4400
relic.
2GB max ram. total.
gma950. no intel support now.

why think this card mobo has COM1 port, there is none
nor LPT line printer port, for years.

HP ended support on the PC long ago.
all they have is , echo of past , light.
https://support.hp.com/us-en/document/c01048297?jumpid=reg_r1002_usen_c-001_title_r0001

COM1 and COM2 refer to a computer's communications, or serial, ports. COM1 ports are often used on older PCs to connect network devices, digital cameras and mice. Faulty drivers software that enables the hardware to communicate with the operating system or incorrect hardware configuration can influence COM1 behavior. In rare cases, the expansion card that adds the serial ports to the PC can fail, rendering both COM1 and COM2 ports useless. To repair a COM1 port, you must determine what is preventing the port from working before attempting a solution.

Click "Start." Go to "Control Panel" and then click "Hardware & Sound." Select "Device Manager" from the submenu. Expand "Ports (COM & LPT)." Double-click "COM1." Review Device Status on the General tab to check for problems with the software driver. If the message "The Device Is Working Properly" appears, click "OK" to close the window; otherwise, look up the error message on Microsoft Support. Follow the directions in the Knowledge Base to correct the issue. Press "Alt" and "V" to open View. Scroll to "Resources by Type." Press "Enter." Double-click "Interrupt Request (IRQ)" to see a list of devices. Double-click "Communications Port (COM1)." Check the term to the left of COM1 to see if the card uses an ISA or PCI interface. If the card uses a PCI interface, it can use the same IRQ as another PCI device without producing a hardware conflict. If the device is ISA, it needs its own IRQ. Go to the "Resources" tab. If "No Conflicts" appears in the Conflicting Device List, close the window; otherwise, uncheck "Use Automatic Settings." Click the drop-down menu and select each configuration until the port no longer interferes with another device. If conflicts occur with each configuration, double-click "IRQ"; you may need to try different configurations before Windows gives you permission to edit the interrupt request. Click the up or down arrow to change the IRQ until the message "No Devices Are Conflicting" appears in the Conflict Information field. Click "OK" to close each window. Click "Yes" when prompted. Connect a device to the COM1 port to test the port. If the device doesn't respond, shut down the computer and then unplug the power cable. Disconnect all devices from the back of the PC. Remove the case cover and touch the computer's chassis. Set the computer on its side so that the PCI and ISA cards sit at a 90-degree angle to the floor. Find the serial ports on the back of the PC. Look on the opposite side of the case to find the associated card. Shine a flashlight onto the card and make sure that the copper contacts are not visible. If you can see the contacts, reseat the card in its slot so that it's fully installed to the motherboard. Reassemble the case and boot into Windows to test the COM1 port. If the port still fails to work, you may need to replace the serial port card.

If the cable works on the Zebra it should work on the Datamax. It must be a RS232 serial null modem cable.Check the serial port settings and make sure the printer setting match the PC serial port settings. Baud Rate=________? Data Bits=________? Parity=_______?Stop Bits=________? Handshaking=____________?

The typical settings are Baud 9600,8,n,1 Xon/Xoff.
Also make sure of the comm port being used. com1,com2......etc

We are here to help. Contact +18002044427 HP® for Consumer, Business and Enterprise technical support for HP products and services.

Please see the link here below for the complete manual.
http://www.lantronix.com/pdf/UDS1100_UG.pdf

If you go to page 70 you will see the complete pin layout for RS232, if you need to connect it to a PC with a 9 pin RS232 port you can see the equivalent on page 72.

Please let me know if you need more details.

I replaced my USB/Serial RS232 port adapter with a genuine RS232 serial port on the PC. THis solved the problem. Further reasearch on the net indicated that USB to RS232 - serial port converters do often have problems. I previously had not had a problem running on Windows XP and this is what alerted me to the possibility of the USB/RS232 port adapter as a possible reason for the "new" problem.

3 THINGS MUST HAPPEN, THE USB PORT MUST NOT BE DEAD. IN VISTA
the site shows Telnet over ethernet, are you confused? p 10001
this system has ethernet lan access TCP/IP fully
what on earth used RS323? com ports name i t? be specific?
they have vast set of hardware option too many for me to guess what have in total, and why not ask them for help. first.?????
even buy there interface and adaptors from them only.


THE USB >RS232 ADAPTOR (COM) MUST SHOW UP IN VISTA
DEVICE MANAGER.
VAST ADAPTORS LIKE THAT ( I HAVE MANY) DO NOT RUN ON VISTA AT ALL OR OLDER OS, THEY ENDED ALL THAT IN 2014.
3 YEARS AGO FOR YOU ENDED.
RULE 3, IS IN THAT DEVICE MANAGER, PAGE, COM PORT PROPERTIES, MUST BE VIEWED TO SE WHAT COMM PORT WAS ASSIGNED. COM1 TO COM 8 OR ?
AND THE APP YOU RUN IS THEN SET TO THE COM PORT. BY YOU MANUALLY SAY COM 6.(AS IT TOLD YOU)

THERE ARE ONLY 2 CURES BESIDES ABOVE
GET A REAL PC WITH W10 AND USE W10 ADAPTERS ONLY
OP BUY RELIC 2007 ADAPTORS PROMISED TO DO VISTA 2009.
BUYING RELIC ADAPTERS IS NEVER EASY MOST SELLERS ARE CLUELESS OF ANY OF THAT, THEY JUST SELL IT..
OR BUY FROM NEWEGG.COM AND ASK FIRST BEFORE BUY.

ALL MINE WORK, all ham gear, and my APC UPS and more.
never a problem but learn the driver must match the OS and adapter both. (and not a dead usb port try them all) usb not disabled in BIOS..
some old mobo have vestigial COM1-4 ports, and must be disabled in bios.
the adaptor is also called TTL232 and does not do +12-12v IEA levels and real target device may demand RS232 levels to go as far as 100 fee. does your run that far, not told how wired, to locks
im a big time old RS232 /485 guy here and know its limits.
TTL only works short distances, say 2 ft max.
TTL is 0.4v to 4.v levels and horrible at distance.

doors.net , that? version 5?
not use this ,
XT-MSC Controller Setup Ethernet way??? what do you have IS see like 10 systems there.

this (that means no TTL232 adapter can work)
Primary PXL controller using a serial connection?????
the PXL (if is and not told) uses this
RS-485 Networking, 256 door/65,000 User
Capacity per site
• RS-232 Port for direct PC, TCP/IP or Modem
Connection, 5 Year Memory Retention

as you can see this is serious commercial doors not home toys
it uses real industry standard, RS323,(or 485) signals that can go 100ft min. TTL232 will never ever work and are toy grade used for
things like toy PC called Arduino, most commonly.
but no hardware told if did id read its data sheet to you.
yes good adaptors real are sold, and use an internal dual rail
+12vdc and -12vdc (or near) charge pump, to do EIA/TIA RS232 legal level switching, ask and I can show them but not for VISTA

last man on VISTA on earth are you?

I purchased the Nikkai USB to RS232 adapter from Maplin and could not get the device working. (Maplin staff not much help!) The lead uses the Prolific PL-2303 device but Prolific do not supply the drivers to end users.
However I found the drivers that appear to work at:

http://www.cooldrives.com/wividrforprc.html

This then recognises the lead as a COM port. So far everything seems to work OK.
(Null modem check and basic 9600 data transfer.)

I hope that helps everybody.

First check the com port speed of computer port which you connected scanner .Com port speed should be 9600.
To change com port speed in computer go to computer/properties/device manager.
Select the ports eg com1 .Right click communication port go to properties and select port settings Bits per second should be 9600.
Serial scanner can not be test in word or note pad.you can download the RS232 software from below link and test the scanner
http://www.lookrs232.com/

Ok,

This machine has a parallel port. Try to print via parallel cable. If it works, consider staying with it. Serial ports are a pain to manage.
If you absolutely have to do it via rs232 though....
Question 1. Has it ever printed?
If yes, Go into Windows Printers and Faxes control and select the Zebra or whatever printer that you are using. Right click on it and you should get a menu that at the bottom say "Properties", select that, then you should get a new window with tabs at the top. You want the tab for "Ports". Select it and you will see all of the different output ports that you can direct your printing. RS232 is a COM port. So start at COM1, check it and try to print. If that doesn't work, go to COM2, etc.

Last resort, If you can't get control via the printer driver program, you will have to try redirecting the print manually (now you will understand why I said to stay with parallel output).
What you have to do is redirect your printing via the dos "mode" command.
Under "Start Menu" goto "Run" and put in "CMD" and click "OK".

This opens a black square window with a cursor blinking. Type in this:
mode com1:9600,n,8,1 (enter)

mode lpt2=com1 (enter)

Tell your program to use LPT2 if you can and see if it works.
By now a parallel cable instead of RS232 should be looking really good.
Good luck!