Would anybody be interested in a rpd/interceptor?
Would anybody be interested in a rpd/interceptor?
So as of right now I am gathering a bunch of arduino parts to build a RPD module for my cobalt sport. It would plug right into the obd ii port and read engine diagnostics. After further programming I want to incorporate DTC read outs and reset options. I also want to use the 0-5v analog out of the AEM AFR gauge to read on this Display.
As of right now I have access to the following parameters:
--
Vehicle speed
Engine RPM
Throttle position
Calculated/absolute Engine load
Engine coolant temperature
Intake temperature
Intake pressure
MAF flow pressure
Fuel pressure
Barometric pressure
Ignition timing advance
Engine running time
Vehicle running distance
I got the idea and bulk of the code from a guy that did something similar, but instead of a little 48x84 lcd screen I plan on using a 3.2" TFT LCD Touch screen. Probs going to cut out the gps feature too.
See Here:Arduino OBD-II Kit | OBD-II UART Adapter | Develop with Arduino
What do you guys think? would anybody be possibly be interested? I will start working hands on over christmas break.
As of right now I have access to the following parameters:
--
Vehicle speed
Engine RPM
Throttle position
Calculated/absolute Engine load
Engine coolant temperature
Intake temperature
Intake pressure
MAF flow pressure
Fuel pressure
Barometric pressure
Ignition timing advance
Engine running time
Vehicle running distance
I got the idea and bulk of the code from a guy that did something similar, but instead of a little 48x84 lcd screen I plan on using a 3.2" TFT LCD Touch screen. Probs going to cut out the gps feature too.
See Here:Arduino OBD-II Kit | OBD-II UART Adapter | Develop with Arduino
What do you guys think? would anybody be possibly be interested? I will start working hands on over christmas break.
O.o if you say so. assuming you can score a interceptor for 80$ and get the addon for maybe 150~~~~ still be a nice deal. how much you think you would spend doing the arduino monitor?
The logic board and all necessary addons, minus the gps, will cost around 90-100$ I can machine the enclosures and code the device. The thing I like is the 3.2" screen, you can easily display more than 2 parameters at a time. All said and done I believe it can be made cheaper than that of a Aeroforce Interceptor New for New.
Yeah I'll try to post some updates once I start to make some headway on the project, I mean the most time consuming part will be writting the remainder of the software code. Once that is done tho It will not take much to replicate these. Yeah the Arduinos are awesome, last night one of my friends had a party and had his automated bartender machine there, it is all ran by the arduino, you just go on his android tablet and select the drink you want and it will make it for you!
I just started revising code, I added reads for the short term and long term fuel trims and have created an English ('murican) 
units version. Right now I am working on a new font for the display, debating if I should mimic the font the SS RPD uses or just make something completely new. I am gonna hold off until I am on christmas break to start tackling a semi GUI for the screen.
units version. Right now I am working on a new font for the display, debating if I should mimic the font the SS RPD uses or just make something completely new. I am gonna hold off until I am on christmas break to start tackling a semi GUI for the screen.
Alright I've started to make some headway with this project. I have fully implemented and tested the Air to fuel ratio readout. I have not received my LCD yet...Damn you China!. So when I tested the AFR code I had to use the on board led as an output to verify that my code works. solid light for pegged rich and as very fast blinking light for pegged lean. I'll try to upload some videos later this week.
There is a chip that can decipher the ELM OBD-2 library and from there is transmitted to the Arduino via the RX TX communication ports. Everything else has to be developed from the ground up, ie, user interface. On a plus note the arduino library is rather easy to use.
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Joined: 01-19-10
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From: North Carolina
No Arduino RPD build for me: I'm looking to build a mintduino build for a hopped up hot/cold smoker! 
I saw the library, and I was amazed at some of the stuff you can pull from. God bless open source.
I saw the library, and I was amazed at some of the stuff you can pull from. God bless open source.
Alright my imagination has been running wild with this project. I hooked up a MAP sensor and was testing some portions on my code. I locked the AFR reading in by just connecting the read to the 3.3v output...but the MAP is reading pressure correctly, what I wan't to try and do is implement a boost control solenoid to mimic the SS's first gear boost reduction for launching. I have the output all set up already, now I just need a SS's boost control solenoid. For those of you questioning how I going to control when it is active: I will use the OBD speed PID activate it.
for IE:
Here is some RAW serial output data from the sensor:
For some of you wondering, I had a hose hooked up to the sensor and was forcing pressure to the sensor and also creating a vacuum.
And Finally a brief video of it logging:
for IE:
Code:
if (speed < 25 || speed == 25) // This is when the Control Solenoid could be activated
{
while (AbsPres > 8.01) // This loop is continuous until it is proven wrong
{
relieve(); // This is a function I created to activate the Solenoid
}
}
Code:
15.97 <-- Air to Fuel Ratio 14.66 (A)Psi -0.04 Psi 15.97 <-- Air to Fuel Ratio 15.43 (A)Psi 0.73 Psi 15.97 <-- Air to Fuel Ratio Boost Control Solenoid is Active 16.59 (A)Psi 1.89 Psi Boost Control Solenoid is Active 16.30 (A)Psi 1.60 Psi Boost Control Solenoid is Active 16.39 (A)Psi 1.69 Psi Boost Control Solenoid is Active 15.18 (A)Psi 0.48 Psi 15.69 (A)Psi 0.99 Psi 15.97 <-- Air to Fuel Ratio 15.11 (A)Psi 0.41 Psi 15.97 <-- Air to Fuel Ratio 14.69 (A)Psi -0.01 Psi 15.97 <-- Air to Fuel Ratio 14.66 (A)Psi -0.04 Psi 15.97 <-- Air to Fuel Ratio 12.75 (A)Psi -1.95 Psi 15.97 <-- Air to Fuel Ratio 10.26 (A)Psi -4.44 Psi 15.97 <-- Air to Fuel Ratio 7.32 (A)Psi -7.38 Psi 15.97 <-- Air to Fuel Ratio 8.17 (A)Psi -6.53 Psi 15.97 <-- Air to Fuel Ratio 7.69 (A)Psi -7.01 Psi 15.97 <-- Air to Fuel Ratio 8.09 (A)Psi -6.61 Psi 15.97 <-- Air to Fuel Ratio 4.38 (A)Psi -10.32 Psi 15.97 <-- Air to Fuel Ratio 4.40 (A)Psi -10.30 Psi 15.96 <-- Air to Fuel Ratio 14.69 (A)Psi -0.01 Psi 15.97 <-- Air to Fuel Ratio 14.66 (A)Psi -0.04 Psi 15.97 <-- Air to Fuel Ratio 14.66 (A)Psi -0.04 Psi 15.97 <-- Air to Fuel Ratio 14.69 (A)Psi -0.01 Psi 15.96 <-- Air to Fuel Ratio 14.66 (A)Psi -0.04 Psi 15.97 <-- Air to Fuel Ratio 14.69 (A)Psi -0.01 Psi 15.97 <-- Air to Fuel Ratio 14.69 (A)Psi -0.01 Psi 15.97 <-- Air to Fuel Ratio 14.63 (A)Psi -0.07 Psi
And Finally a brief video of it logging:
Last edited by klotzy_550; Jan 12, 2013 at 08:13 PM.
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