VW Posted November 26, 2019 Share Posted November 26, 2019 I got a SIO2PC cable around 15 years ago from Lotharek off of ebay. It has an Atari SIO connector on one end and a serial DB9 on the other end. It has worked great over the years but I would like to use it with a Raspberry Pi and was wondering if I could just plug the serial end of the cable into a Serial-USB adapter and have it work. I did some searching and it seems like everyone is doing basically the same thing by building their own SIO to USB cables. It seems like the hard work should have been done already with my SIO 2 serial cable and was wondering if there was anything I should be aware of, a couple of people on youtube said they damaged their adapter somehow. Thanks for any info anyone has! Quote Link to comment Share on other sites More sharing options...
TGB1718 Posted November 26, 2019 Share Posted November 26, 2019 No, it wont work, SIO2PC uses the command, Serial IN, Serial OUT, USB only gas 2 data lines, also SIO2PC has a voltage convertor as RS232 used +/- 12VDC, USB is 5VDC, hence damage. (see attached SIO2PC circuit) I have used SIO2USB, but not with a dedicated cable, I bought a USB to Serial cable (TTL Serial) for a few pounds and used it successfully with Respqt. Quote Link to comment Share on other sites More sharing options...
gpounce Posted November 26, 2019 Share Posted November 26, 2019 (edited) ttl voltage level usb to serial cables are easily available- using the Prolific chipset. they are 2-wire; rx data and tx data only, so software expecting the COMMAND signal wont be happy- but if its possible to ignore command the the flying leads of the cable can connect directly to the SIO port. note that the flying leads will need something to adapt then to the SIO pins. Edited November 26, 2019 by gpounce Quote Link to comment Share on other sites More sharing options...
HiassofT Posted November 26, 2019 Share Posted November 26, 2019 (edited) Yes, using a USB-serial adapter with a standard DB9 connector should work fine. In general I recommend getting a USB-serial adapter with the FTDI FT232 chip - these are well supported and usually have all the necessary control lines connected on the DB9 RS232 port. Some time ago I tested with an (IIRC Digitus branded) adapter and my homebrew serial SIO2PC cable connected to a RPi and it worked just fine. so long, Hias Edited November 26, 2019 by HiassofT 2 Quote Link to comment Share on other sites More sharing options...
VW Posted November 29, 2019 Author Share Posted November 29, 2019 On 11/26/2019 at 6:46 AM, HiassofT said: Yes, using a USB-serial adapter with a standard DB9 connector should work fine. In general I recommend getting a USB-serial adapter with the FTDI FT232 chip - these are well supported and usually have all the necessary control lines connected on the DB9 RS232 port. Some time ago I tested with an (IIRC Digitus branded) adapter and my homebrew serial SIO2PC cable connected to a RPi and it worked just fine. so long, Hias Thanks for the info, I must have got lucky with my USB-Serial adapter since I plugged it in to the RPi and my SIO2PC cable and everything worked great! It's a generic adapter with no labeling that I found for $4 at my local electronics surplus store. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.