rainhorn
Posts: 3
Joined: Fri Nov 17, 2017 2:58 pm

RPI3 - Serial Adapter

Thu Jan 11, 2018 8:45 pm

Hi there,

The set up for my problem is the following, I got Exagear Desktop on my Pi 3 (running Raspbian). With it I was able to install Wine and a few low end windows application. They run fine, and on first glance don't feel like they have any problems.
Now, these applications are for connecting to outside devices through a serial connection.
I have a serial adapter I can connect to one of the RPI3 USB ports, but the system won't recognize the cable at all.
I am almost positive this is an issue with drivers. I have also tried multiple serial to USB adapters with no success.
Does anybody have any suggestions in how to get a serial - to USB adapter reading on a Pi 3?

Thanks

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FTrevorGowen
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Re: RPI3 - Serial Adapter

Sat Jan 13, 2018 6:59 pm

rainhorn wrote: Hi there,

The set up for my problem is the following, I got Exagear Desktop on my Pi 3 (running Raspbian). With it I was able to install Wine and a few low end windows application. They run fine, and on first glance don't feel like they have any problems.
Now, these applications are for connecting to outside devices through a serial connection.
I have a serial adapter I can connect to one of the RPI3 USB ports, but the system won't recognize the cable at all.
I am almost positive this is an issue with drivers. I have also tried multiple serial to USB adapters with no success.
Does anybody have any suggestions in how to get a serial - to USB adapter reading on a Pi 3?

Thanks
What type of serial connection do the "outside devices" use?
Eg. what voltage levels (3.3V, 5V "true" RS232)? Are handshaking signals involved? Typical "baud rates"?
Some "serial" devices use strange "protocols": http://www.cpmspectrepi.uk/raspberry_pi ... 000zc.html
FWIW, I've certainly used both USB-to-TTL** and USB-to-RS232 (w/o handshaking ie. a "null-modem" setup)**** from time-to-time:
** http://www.cpmspectrepi.uk/raspberry_pi ... pters.html (NB: shown there mainly the opposite way around to your setup, but, IIRC, I have setup a Pi-to-Pi USB-to-TTL link as well ie. the linux drivers exist)
**** http://www.cpmspectrepi.uk/raspberry_pi ... apter.html
and http://www.cpmspectrepi.uk/raspberry_pi ... rtRep.html
Still running Raspbian Jessie on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W) but Stretch on my P3B+, P3B, B+, A+ and a B2. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

hippy
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Joined: Fri Sep 09, 2011 10:34 pm
Location: UK

Re: RPI3 - Serial Adapter

Sat Jan 13, 2018 8:30 pm

rainhorn wrote:
Thu Jan 11, 2018 8:45 pm
I have a serial adapter I can connect to one of the RPI3 USB ports, but the system won't recognize the cable at all.
I am almost positive this is an issue with drivers.
Possibly. What cable is it, who is the manufacturer, what's its model, what does 'lsusb' show when it's plugged in ?

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