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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 12-08-2019, 09:08 PM
Sbpage21 Sbpage21 is offline
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E36 Digital Cluster

Hey guys, as many have searched and played with I am wanting to do a digital guage cluster for my 95 325i OBDI. The abvous issue, getting the live data and getting the live data quick enough from the OBDI system.

I came across a guy that has done so successfully for a pre-OBDII nissan. I wanted to start with trying to understand completely how the BMW OBDI sends the engines information via BUS lines and what protocol BMW used on their E36 lineup if anyone is familiar with that.

Secondly, I've read around on guys looking for scanners nd such that would be able to read/clear codes or pull live data on the OBDI systems with no luck. I currently have a Snapon Solus Edge with the 20-pin adapter, and I am able to read/clear codes, read live data,and also special functions such as turning each individual fuel injector, and idle air control valve. And am also able to enter every module present in the vehicle (DME/Airbag/ABS/Body Control/ect). I am curious as to how this scanner is able to cooperate with the bmw obdI, if anyone is knowledgeable on this.

I am no means capable of creating a software/code to display live data with maybe a raspberry Pi, and if idea is not doable. Would it be possible to replace engine harness with a OBDII harness and DME and just use a bluetooth reader with OBDII scanner app?

Now if yall are wondering why I'm wanting to do this, its solely personal. It's not for anything particular, such as tuneability or performance. But for what I'd like to have, and see when I'm driving my car. I don't go to car meets, car shows or to the track. And like to modify to my likes. Hope some of you can chime in with some good advice and help, alot of smart guys on here!

THANKS!
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  #2  
Old 12-11-2019, 12:57 AM
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hornhospital hornhospital is offline
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Mein Auto: E24x2,E36x3,E30x2, F150
There is a digital IC available for an E36, because I've seen one in use, but who made it, where to get it, or whether it's a "one size fits all" device or it's E36 specific, I don't know. It was in a friend's E36 race car. How it gathers info is also unknown to me. May use the stock harness and sensors, may not.
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Old 12-11-2019, 09:01 AM
Sbpage21 Sbpage21 is offline
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Thanks for the reply! Good news knowing it's been done to some extent somewhere.

So I've been doing extensive research and found that I can use a ADC (Analog to digital converter) to run all of my sensors through that will plug into my raspberry Pi. From what I understand, I will run selected sensors to converter, that will send to Pi, and I enter parameters accordingly for each sensor, that can than be displayed. I was able to find all parameters for all sensors through all data. Which showed voltage ranges such as
Coolant temp @68***8304; - 2.0v
Coolant temp @175***8304; - 1.0v
And everything in between and all other sensors as well, fuel consumption, oil pressure, rpm signal, speed sensor and such.

Problem I have now, is writing code to run a program to display guages. That's where my knowledge ends! Lol
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Old 12-11-2019, 07:37 PM
Sbpage21 Sbpage21 is offline
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Also found this information from my snapon manual
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Old 12-18-2019, 11:37 AM
Sbpage21 Sbpage21 is offline
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Was able to pull this info as well from vehicle
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