DIY - SM-AFR USB Cable

Anything related to the PLX brand of wideband devices.

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TechSX
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Joined: Fri Feb 01, 2013 4:51 am

DIY - SM-AFR USB Cable

Post by TechSX » Wed Feb 20, 2013 10:53 pm

Hello,

This is my PLX USB adapter and work very well.

There are several Serial-to-USB TTL converters available on the market, and any one can translate the signal from the PLX SM-series sensor to computer.

What you need:
- FT232RL USB to Serial adapter module ( Mini USB )
- 3.5mm Stereo Audio Male Plug Jack
- Some electrical wiring
1e2.JPG
Mini USB Adapter
1e2.JPG (89.74 KiB) Viewed 19402 times
3e4.JPG
Connections
3e4.JPG (70.88 KiB) Viewed 19402 times
5a6.JPG
Working
5a6.JPG (101.92 KiB) Viewed 19402 times
Nice and Simple :D

Matt
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Re: DIY - SM-AFR USB Cable

Post by Matt » Thu Feb 21, 2013 11:05 am

Good work. Its nice to see the PLX wideband up and working finally :D

Kranzy
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Joined: Thu Oct 04, 2007 1:46 am

Re: DIY - SM-AFR USB Cable

Post by Kranzy » Fri May 10, 2013 11:07 am

Sorry to bump an old thread, but can you confirm that the RX is on the tip of the 3.5mm plug?

Where did you purchase the usb converter from?

Tengis
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Joined: Thu Oct 23, 2014 2:21 am

Re: DIY - SM-AFR USB Cable

Post by Tengis » Mon Apr 27, 2015 12:53 am

Awesome. Old thread but very useful. Just ordered what I need.

Raybrant
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Re: DIY - SM-AFR USB Cable

Post by Raybrant » Sun Aug 09, 2015 7:30 am

Would a simple 3.5mm male audio jack to mini-USB cable work instead? Or does it need that chip to convert the signal to something the computer can understand?

Thinking of something like this:
Image

Matt
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Re: DIY - SM-AFR USB Cable

Post by Matt » Sun Aug 09, 2015 10:02 am

You will need the TTL - USB converter.

I'm not sure what that plug is for, but it would seem there is no converter in it?

Raybrant
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Re: DIY - SM-AFR USB Cable

Post by Raybrant » Thu Aug 20, 2015 2:18 pm

Found a cable you can buy off the shelves with the converter already embedded on the USB. Made by the same company that makes the chip in OP's post FTDI.

http://www.amazon.com/3-3V-USB-SeriaL-C ... ttl+serial

Image

One problem though is the TIP and RING connections are swapped. This cable has the TIP as TX and RING as RX and OP wired them as TIP RX, RING TX. May have to cut the connector off and swap the wires.

Edit: Nevermind, OP's way is far cheaper. $8USD for the chip, $5 for the male audio cable, ~$4 for the wiring, pin connectors, etc.

chris2712au
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Re: DIY - SM-AFR USB Cable

Post by chris2712au » Sat Sep 26, 2015 8:36 pm

Hi guys, been a while since I have been on..

Can you tell me more in terms of the PLX setup as in the nistune configuration ?

I am use to the DLP board the and look up table ? and wiring the two togethter ?

Is this plug and play with a driver / setup ?

Cheers

Chris

Matt
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Re: DIY - SM-AFR USB Cable

Post by Matt » Sun Sep 27, 2015 4:58 pm

If using the PLX it has auxillary I/O so you dont need a DLP because of the extra inputs

chris2712au
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Re: DIY - SM-AFR USB Cable

Post by chris2712au » Fri Oct 16, 2015 6:49 pm

the SM-AFR in the photo is like the one that I have in my car, it has narrow and wideband outputs tx and rx and thats about it.. only way to nistune it previously was to use the DLP board..

chris2712au
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Re: DIY - SM-AFR USB Cable

Post by chris2712au » Mon Nov 16, 2015 9:42 pm

just tried this little project, works really well, thanks to the poster for the mod.

Wasson Will
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Re: DIY - SM-AFR USB Cable

Post by Wasson Will » Tue Nov 22, 2016 9:56 am

Yeah brilliant link, got Mine working this week with at the cost of £8 compared to £60 for a bought lead. Many thanks.

As these PLX devices can be daisy chained as they call it, was wondering for tuning purposes is it possible to fit a PLX boost sensor and feed that in to nistune as a reference to aid in target AFRs rather than just looking at TP.

Currently starting to tweek an S13 CA engine with Stage 3 kit fitted.

URG8RB8
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Re: DIY - SM-AFR USB Cable

Post by URG8RB8 » Wed Jan 11, 2017 6:33 am

Used this post last week to get my PLX up and running properly on Nistune (Thank you very much), but I could not figure out how to log the WBO2 data in the data log. I could not find it in any drop down box. I am sure I am missing a tick mark somewhere in the configuration but so far I have not located it. Any help would be appreciated. Thanks!

Matt
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Re: DIY - SM-AFR USB Cable

Post by Matt » Wed Jan 11, 2017 9:52 am

If you connect only the wideband and then pull up the guages window (4 guage button) do you get anything? What about the Display > Knock Warning panel? Do you get AFR LHS there?

Please ALT-PRINTSCN to capture screenshot showing these windows (and log player) and paste into MSPaint then save file and post here ( or email)

Only wideband connected (not consult connected)

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