Wow. Thank you for all the effort. A low cost solution to this problem is long overdue.
Any plans to make this work with other pcms?
Wow. Thank you for all the effort. A low cost solution to this problem is long overdue.
Any plans to make this work with other pcms?
At this point in time were just focused on finishing the current project before thinking about anything else. There is still the matter of creating Xdf's for all of the 03+ stuff so that the bins can be used with tuner pro.
I personally got to know EagleMark.
What your "like minded" team has done would certainly make EagleMark SMILE!
Congrats to all your "like minded" team for what has been accomplished to date. I sense the "Snowball" of success is growing bigger and bigger.
dave w
Having built a few interfaces for similar things, this is no small feat. When are you planning to update us on the hardware needed to help with the software development? (I'm pretty good with designing/troubleshooting hardware...but you don't want me writing your code...it might work, but it ain't gonna be pretty.)
So I guess someone have done this software faster than I could :) I'm in the middle of work to create my own OBD2 reflash tool, I've had good progress with cheap ELM327 compatible hardware, I see no reason to build custom one. Maybe we could help each other finalize that :)
What is the largest packet size you've been able to send? I personally have done quite a bit of work with the OBDLink MX. It has the largest buffer of any of the "Dongle" type interfaces I have come across.
Great news ..kinda curious is this the same GitHub?
https://github.com/blog/2502-github-...nctuary-cities
Our work on this can be found here. It's still being filled in as we sort out every thing. Trust me.... some of the information we have been sending around the group would make your head hurt just looking at it lol. We're slowing making it so others can understand what we did, how we did it and then be able to recreate it on their own.Originally Posted by EDZIP
Currently the hardware is pretty simple. It's 4 resistors, 1 diode and 1 optocoupler. All the magic is done in the Arduino code.
I was almost sure you had used some cheap vpw transiever like motorola 33990 or similar auto grade one.
It is waste of time and effort to turn the arduino in software transiever when you can hook a simple piece of hardware to do it. Not sure how stable will be in car and off the bench test. Noise might be a big stability problem if software can`t compensate. Anyway big respect for the effort. I just want to express that it might not be the most economical approach.
VPW is 0-7 volt signal, so I guess the needed hardware is to change the 0-5 volts on the Arduino tx-rx line.
If you want to go cheaper and software only, ditch the Arduino and link the motorola transiever with 2$ usb to ttl and find a way to control the 4x switch.
The ELm is interesting and not the buffer but the main obstacle is that you cannot send hex data over it. You have to convert from ascii characters, and what a nightmare is to change the header.
Buffer size is the only limit I've ever found with the elm stuff. I've read and written Vin numbers,serial numbers,BCC codes even OS segment id codes with an elm type device in Android. I actually read a bin file out over Bluetooth with my phone last night.....trust me when i say buffer size IS it's biggest drawback. Reading 192 byte blocks takes forever
If your still stuck on the ascii to hex thing i'll give you a tip on an easy hack method I used before I learned how to change from base 10 to base16 to take care of it the conversion for me.
Write a function that does the conversion. Here's a super easy hack method. Set your input = to an output
0=0
1=1
5=5
9=9
A=42
L=4C
Q=51
Etc.....
Yes the statement will be huge and its 100% hack method to do this but it works.
Store your variable
Call the conversion function & store as a new variable
send data from the new variable.
Like I said it's a total hack but it'll work.
Pm me if you'd like to discuss them elm in more depth
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