Darn software...
Darn software...
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
i can't write windows/DOS software worth a damn, otherwise i'd volunteer.... i only seem to work well with 68HC11/similar stuff.
did some digging as well:
http://www.obdsol.com/downloads/stn1110_vs_elm327.pdf
ELM327 has 1.5KB of RAM... the STN piece has 8KB. it also has 4 times as much PROM space and has a processing speed 10X faster as well...
IIRC, the big issue with attempting to use the ELM327 to flash the PCM was due to the ELM unit not being able to handle enough bytes of data at a time for transferring to the PCM.... with this much of a RAM bump, it seems like this at least has a shot at working. need to find someone who knows their OBD2 flashing protocalls to be certain.
Good read here......But you already know that Robert........
http://60degreev6.com/forum/showthre...similar-device
Last edited by gregs78cam; 04-02-2012 at 09:06 AM.
1978 Camaro Type LT, 383, Dual TBI, '7427, 4L80E
1981 Camaro Z-28 Clone, T-Tops, 350/TH350
1981 Camaro Berlinetta, V-6, 3spd
1974 Chevy/GMC Truck, '90 TBI 350, '7427, TH350, NP203, 6" lift, 35s
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.
Familiar with 1227747 and 16197427 PCMs
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!
Last edited by FSJ Guy; 04-06-2012 at 08:09 PM. Reason: Update
Familiar with 1227747 and 16197427 PCMs
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
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
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Where's the pic and write up ?
thanks for sharing Robert, i will have to order one an try it out.
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?
would this work?
http://www.ebay.com/itm/FT232RL-USB-...item25765256ef
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.
ok so i got the chip how to i set it up so the computer reads it and so does tuner pro
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