I've several USB <-> RS-232 dongles around. As well as a few embedded devices. They all "Just Work (tm)" on Redhat, CentOS, Fedora, Debian, Raspian and Kali. Knock on wood - never had a problem using any of them. As the drivers are part of the kernel, I'd expect any distro using a recent kernel to do well. On Wed, Jul 8, 2020 at 9:24 AM Leroy Tennison <leroy at datavoiceint.com> wrote:> I've used one on a Linux laptop, it "just worked" but the OS wasn't CentOS > 7. > > ________________________________ > From: CentOS <centos-bounces at centos.org> on behalf of H < > agents at meddatainc.com> > Sent: Wednesday, July 8, 2020 10:13 AM > To: Centos Mailing List <centos at centos.org> > Subject: [EXTERNAL] [CentOS] USB-serial adapter for CentOS 7 > > CAUTION: This email originated from outside of the organization. Do not > click links or open attachments unless you recognize the sender and know > the content is safe. > > > I need to connect an older APS UPS unit to a machine running CentOS 7. > Unfortunately the UPS only has a serial port whereas the computer does not. > I am aware that there are USB-serial adapters but that the hardware or the > drivers might fall short of expectations. > > Does anyone have positive experience with such an adapter? Or, conversely, > would recommend avoid a particular adapter? > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos > > Harriscomputer > > Leroy Tennison > Network Information/Cyber Security Specialist > E: leroy at datavoiceint.com > > > > [cid:Data-Voice-International-LOGO_aa3d1c6e-5cfb-451f-ba2c-af8059e69609.PNG] > > > 2220 Bush Dr > McKinney, Texas > 75070 > www.datavoiceint.com<http://www..com> > > > This message has been sent on behalf of a company that is part of the > Harris Operating Group of Constellation Software Inc. > > If you prefer not to be contacted by Harris Operating Group please notify > us<http://subscribe.harriscomputer.com/>. > > > > This message is intended exclusively for the individual or entity to which > it is addressed. This communication may contain information that is > proprietary, privileged or confidential or otherwise legally exempt from > disclosure. If you are not the named addressee, you are not authorized to > read, print, retain, copy or disseminate this message or any part of it. If > you have received this message in error, please notify the sender > immediately by e-mail and delete all copies of the message. > > > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >-- Tate Belden "The Dungeon <http://ka7o.net>" We are dreamers, shapers, singers and makers. We study the mysteries of laser and circuit, crystal and scanner, holographic demons and invocations of equations. These are the tools we employ, and we know many things. --Elric
On 2020-07-08 11:28, Tate Belden wrote:> I've several USB <-> RS-232 dongles around. As well as a few embedded > devices. They all "Just Work (tm)" on Redhat, CentOS, Fedora, Debian, > Raspian and Kali.Even if you did have an RS232 port on the box, the serial drivers for CentOS 7 have never worked correctly. I had an application using RS232 that worked perfectly under CentOS 6, and then worked intermittently under CentOS 7, and failed miserably on CentOS 8. The handwriting on the RedHat wall says, "nobody uses RS232 anymore!" I moved the app to a Raspberry Pi 3B+, using the USB serial adapters, and it works perfectly again. Todd Merriman Software Toolz, Inc.
-> "nobody uses RS232 anymore!" Somebody needs to update the hand writing on the wall, although the physical hardware may be an RJ-45, the RS232 protocol is still used on headless devices and probably other things. I use minicom more than I wish but it's still required. ________________________________ From: CentOS <centos-bounces at centos.org> on behalf of mailist <mailist at toolz.com> Sent: Wednesday, July 8, 2020 11:11 AM To: CentOS mailing list <centos at centos.org> Subject: [EXTERNAL] Re: [CentOS] USB-serial adapter for CentOS 7 CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Harriscomputer Leroy Tennison Network Information/Cyber Security Specialist E: leroy at datavoiceint.com [cid:Data-Voice-International-LOGO_aa3d1c6e-5cfb-451f-ba2c-af8059e69609.PNG] 2220 Bush Dr McKinney, Texas 75070 www.datavoiceint.com<http://www..com> This message has been sent on behalf of a company that is part of the Harris Operating Group of Constellation Software Inc. If you prefer not to be contacted by Harris Operating Group please notify us<http://subscribe.harriscomputer.com/>. This message is intended exclusively for the individual or entity to which it is addressed. This communication may contain information that is proprietary, privileged or confidential or otherwise legally exempt from disclosure. If you are not the named addressee, you are not authorized to read, print, retain, copy or disseminate this message or any part of it. If you have received this message in error, please notify the sender immediately by e-mail and delete all copies of the message. On 2020-07-08 11:28, Tate Belden wrote:> I've several USB <-> RS-232 dongles around. As well as a few embedded > devices. They all "Just Work (tm)" on Redhat, CentOS, Fedora, Debian, > Raspian and Kali.Even if you did have an RS232 port on the box, the serial drivers for CentOS 7 have never worked correctly. I had an application using RS232 that worked perfectly under CentOS 6, and then worked intermittently under CentOS 7, and failed miserably on CentOS 8. The handwriting on the RedHat wall says, "nobody uses RS232 anymore!" I moved the app to a Raspberry Pi 3B+, using the USB serial adapters, and it works perfectly again. Todd Merriman Software Toolz, Inc. _______________________________________________ CentOS mailing list CentOS at centos.org https://lists.centos.org/mailman/listinfo/centos
Once upon a time, mailist <mailist at toolz.com> said:> Even if you did have an RS232 port on the box, the serial drivers > for CentOS 7 have > never worked correctly. I had an application using RS232 that > worked perfectly > under CentOS 6, and then worked intermittently under CentOS 7, and > failed miserably > on CentOS 8. The handwriting on the RedHat wall says, "nobody uses > RS232 anymore!"I've used serial ports just fine on CentOS 7 (haven't had a physical CentOS 8 system so far, so can't say there, but have used serial consoles on CentOS 8 VMs), as well as newer Fedora (similar but newer kernels). Are you sure you weren't doing something in an unsupported and/or undefined way that just happened to work on CentOS 6? -- Chris Adams <linux at cmadams.net>