Uber-easy DIY USB ALDL Cable

[gregs78cam]

Good read here......But you already know that Robert........

http://60degreev6.com/forum/showthre...similar-device

[FSJ Guy]

This one

http://www.sparkfun.com/products/8165

looks like it's designed to be plugged into the other end of a USB cable. It has the TX and RX pins that you speak of. Other than that, I have no clue what I'm talking about. :D

I'd definitely be interested in being able to semi-permanently mount a USB connector under my dash to plug in an ALDL cable.

[RobertISaar]

that one LOOKS like it could work. there does seem to be Rx and Tx pins that could be used for the ALDL end, but i'm not 100% certain of it. you would need to tie them together before the ALDL M pin obviously, then assuming there is a ground pin, and that's all the connections necessary.

i don't know why everybody doesn't just buy them from the link i posted, unless you want a potentially more stable supplier?

[FSJ Guy]

that one LOOKS like it could work. there does seem to be Rx and Tx pins that could be used for the ALDL end, but i'm not 100% certain of it. you would need to tie them together before the ALDL M pin obviously, then assuming there is a ground pin, and that's all the connections necessary.

i don't know why everybody doesn't just buy them from the link i posted, unless you want a potentially more stable supplier?

Sparkfun is about 45 minutes from my house. They allow online ordering and onsite pickup. :D

For $20, I think it's worth a shot. Thank you!

EDIT: Part is on order. For the minimal shipping charge, I'll just let USPS deliver it! It would cost me twice as much to DRIVE down there! LOL!

I'll update what happens when it arrives. Hopefully I won't let the smoke out!

[kunsan1987]

Here is the one i bought from amazon.i have not been able to try it with an ECM yet but it talks to my garmin gps.

http://www.amazon.com/UART-Module-Se...=pd_ys_iyr_img

[RobertISaar]

the pins necessary are present, however it's a CP2102 IC, which isn't quite as capable as the FT232RL, so it MAY work, but i wouldn't gaurantee it.

[one92rs]

ok so this can be used to make a cable that will datalog for cheaper than the 59 bucks for a cable. i am not an electrical genious here. can someone show me how to make it aor what all i need to make it work. a diagram of sort.

[EagleMark]

Everytime you post that link costs me an hour looking around...

OK here's the start of OBDII flash, I did my part now someone needs to do the software...
http://www.sparkfun.com/search/resul...&what=products

[Hard Driver]

Where's the pic and write up ?

[RobertISaar]

on my gigantic "to do" list.

[supercoop]

thanks for sharing Robert, i will have to order one an try it out.

[supercoop]

would you look this over an see if my thinking is correct.

with the Uber-easy DIY USB ALDL Cable posted: RobertISaar

for 8192 applications

connect the RXD and TXD pins together(solder would be the preferred method), then connect that circuit to the ALDL pin M, then connect the ground pin on the converter board to the ground pin in the ALDL connector (pin A).

for 160 baud applications

You do not have to have TX and RX tied together. all you need is the receive part of the circuit, since it doesn't communicate in both directions.
so just connect the RXD pin to the ALDL pin E , then connect the ground pin on the converter board to the ground pin in the ALDL connector (pin A).

an set the voltage jumper setting to 5V, 3.3V might work, but it might also cause more problems.

.In TunerPro RT, set it to 4800 baud and uncheck RS232 echo and it should started acquiring data,

looking at the picture of the board ,i see there is allready a jumper across the TXD an RXD pins.
these are the pins you would connect the M terminal to, for 8192
or remove jumper an connect the E terminal to, RXD for 160 , Correct?

[RobertISaar]

could leave the jumper there, it won't hurt anything, and you'll retain 8192 capability.

[71-nova-lt1]

would this work?
http://www.ebay.com/itm/FT232RL-USB-...item25765256ef

[phonedawgz]

The FT232RL works so it looks good, however the only way to find out if that board in particular works is to try it. The signaling needs to be 5v TTL, not 3.3. It isn't clear if the jumper selects the signaling voltage or an output voltage of the board.