I'm trying to send data to an hplc pump via the serial port using python and pyserial. I tested the cable and the pump under linux (a gentoo derivative), where it worked perfectly, albeit as root. Now i have to use the code on a WinXP machine, where i always get an 'Access denied' error when trying to open the port (i adjusted the parameters to COMxx instead of ttySxx, the port is found).I tried the serial port of the computer, as well as a USB2Serial adapter.I heard that WinXP was quite restrictive when it comes to trying to address some port with self written code.Is there a simpler workaround for this problem than installing linux? Calling.close before opening the port solved a problem that was driving me nuts!I had it working on another machine running vista 64-bit using com0com virtual ports, not a hitch.I was trying to work on the exact same scripts on my Windows 7 box - nada - XP Mode same thing.
Serial Port CableCannot Access Serial Port Windows 7 Ngrok
Access Denied or couldn't find the port (when changing up how the port was addressed). HyperTerminal, of course, recognized and worked with everything flawlessly.4 hours later I find this little nugget and now everything is humming along just fine.It's a good thing I enjoy programming.GAH!
Windows 7 Serial Port Drivers
1 2 months ago after patched Windows 7 Pro. 32 bits, the VMware guest cannot access to the host serial port. Need to manually disable the serial port (in host) and enable it back; than the guest can connect to it (serial port which connected toa dot matrix printer). Once reboot / shutdown the host the problem comes back.
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It looks like the serial port is occupied by some program when the Windows started. How to find out which program is using the serial port.Can anyone help?
Thank you in advance.
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