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Thread: Feeler: Open Source OBC Firmware

  1. #1476
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    89 325iS, 95 M3
    It's more than capable of displaying that, but I'd prefer to have a nice clean "CHECK TIRES" message first, with submenus afterwards. You could always recode it to display "CHECK DF TIRE" for the driver front tire as long as there are five control variables to identify which tire has an alarm.

    Technically it's one frequency with unique IDs (think MAC addresses).

  2. #1477
    Join Date
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    03 540i M Sport/95 525iT
    Food for thought. I just bought a 2013 Mazda CX-9 for family hauler and it's TPMS system appears to be able to determine which sensor is on each corner of the vehicle automatically. IOW, it does not need to be reprogrammed when rotating tires or mounting winter tires as I did. I don't have the technical details but it would seem that they must have a receiver close to each wheel well and detect strongest signal at each location to map the sensors. Given how cheap the Ebay RF receivers are, I wonder if this approach is feasible for Open OBC?
    2003 540i M Sport 6 spd, 97 328iC 5 spd w/M Lux Package, 95 525iT w/M52 5 spd swap, 2008 R1200GS Adventure, 92 Celica All Trac Turbo

  3. #1478
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    Quote Originally Posted by Mark185 View Post
    Food for thought. I just bought a 2013 Mazda CX-9 for family hauler and it's TPMS system appears to be able to determine which sensor is on each corner of the vehicle automatically. IOW, it does not need to be reprogrammed when rotating tires or mounting winter tires as I did. I don't have the technical details but it would seem that they must have a receiver close to each wheel well and detect strongest signal at each location to map the sensors. Given how cheap the Ebay RF receivers are, I wonder if this approach is feasible for Open OBC?
    Doable but extremely complicated really. Your best bet would be sensing strength maybe once or something and trying to decide but the factors are pretty complicated..
    1989 535i - sold
    1999 M3 Tiag/Dove - sold
    1998 M3 Turbo Arctic/black - current
    2004 Built motor TiAg/Black - Sold
    2008 E61 19T Turbo-Wagon - current
    2011 E82 135i - S85 Swap - current
    1998 M3 Cosmos S54 swapped Sedan - current

    1998 Turbo: PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Arp 2k Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, , Poly engine mounts, UUC trans mounts W/ enforcers, 22RPD OBD2 Stock ECU id1700 E85 tune, 22RPD Big power Transmission swap w/ GS6-53

  4. #1479
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    Holland, bish!
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    Euro e36 M3 3.2 cabrio

  5. #1480
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    I mean how many of us rotate tires? I know i cant.. So just label sensors 1-5 and hard code it in that sensor 1 is left front..
    1989 535i - sold
    1999 M3 Tiag/Dove - sold
    1998 M3 Turbo Arctic/black - current
    2004 Built motor TiAg/Black - Sold
    2008 E61 19T Turbo-Wagon - current
    2011 E82 135i - S85 Swap - current
    1998 M3 Cosmos S54 swapped Sedan - current

    1998 Turbo: PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Arp 2k Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, , Poly engine mounts, UUC trans mounts W/ enforcers, 22RPD OBD2 Stock ECU id1700 E85 tune, 22RPD Big power Transmission swap w/ GS6-53

  6. #1481
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    Pricey! And there isn't any documentation on how to read out the signal from the USB, so you'd still have some RE to do.
    1995 OBD I Cosmos Black M3 - RIP: gone but not forgotten

  7. #1482
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    98 m3
    Yeah your better off starting from scratch.
    1989 535i - sold
    1999 M3 Tiag/Dove - sold
    1998 M3 Turbo Arctic/black - current
    2004 Built motor TiAg/Black - Sold
    2008 E61 19T Turbo-Wagon - current
    2011 E82 135i - S85 Swap - current
    1998 M3 Cosmos S54 swapped Sedan - current

    1998 Turbo: PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Arp 2k Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, , Poly engine mounts, UUC trans mounts W/ enforcers, 22RPD OBD2 Stock ECU id1700 E85 tune, 22RPD Big power Transmission swap w/ GS6-53

  8. #1483
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    North Carolina
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    1988 325 Super ETA
    So what is the current status of this project? Just heard about it and 60 pages is daunting!

  9. #1484
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    Quote Originally Posted by dwonda View Post
    So what is the current status of this project? Just heard about it and 60 pages is daunting!
    You can buy a completed board, it works no complaints.
    1989 535i - sold
    1999 M3 Tiag/Dove - sold
    1998 M3 Turbo Arctic/black - current
    2004 Built motor TiAg/Black - Sold
    2008 E61 19T Turbo-Wagon - current
    2011 E82 135i - S85 Swap - current
    1998 M3 Cosmos S54 swapped Sedan - current

    1998 Turbo: PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Arp 2k Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, , Poly engine mounts, UUC trans mounts W/ enforcers, 22RPD OBD2 Stock ECU id1700 E85 tune, 22RPD Big power Transmission swap w/ GS6-53

  10. #1485
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    Aug 2004
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    North Carolina
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    1988 325 Super ETA
    Ok, is there a for sale page somewhere?

  11. #1486
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    Vancouver, B.C., Canada
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    '97 M3
    '97 M3, Estoril blue, 2 dr, euro 6-spd, EFR 9180 divided T4 .92 IWG, RK tuning, CP 8.5:1 pistons, Eagle rods, Schrick cams, L19 11 mm ARP studs, O-ringed block, Supertech stainless/inconel valves, Supertech springs & Ti retainers, ported head, S54 oil pump/pan, 80 lb. injectors, OBD1 intake manifold, Steedspeed twin scroll T4, 3.5" SS exhaust, eBoost2 EBC, HFS-4 W/M injection, AEM Failsafe, Zeitronix data logger, Racelogic TC, OpenOBC w. ethanol %, Ireland Eng. engine mounts, UUC black tranny mounts w. enforcers, UUC twin disc feramic, ARC-8's, MCS 2-ways, Z3 rack, Rallyroad strut bar, X brace, Eibach sway bars, Ground Control LCAB bushings, Bimmerworld RTAB's, Powerflex subframe bushings, 210 4-clutch LSD, Stoptech BBK, titainium shims, steel braided lines, brake cooling ducts.

  12. #1487
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    Aug 2004
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    North Carolina
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    1988 325 Super ETA
    Quote Originally Posted by chikinhed View Post
    Sweet this is so bad ass. One question though what does "accepted" mean in the context of "accepted but unimplemented features"?

  13. #1488
    Join Date
    Jun 2003
    Location
    NY
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    95 m3
    OK, I need Korath to help out with a software update to the OpenOBC.

    I took a 400+ mile drive in my 95 M3 on Friday, and I wanted to measure fuel economy. I reset my CONSUM meter, did about a mile in a 30MPH zone, which resulted in about ~60 measurements (1 measurement per second estimate) and noted that I got about 33mpg. Then I hit a stop light, and while I waited there for a minute, I watched my EPA drop to 20mpg.

    This didn't make me happy because I want to know the efficiency that the car moves at, and adding 0mpg (because I'm not moving) to my average isn't in my estimation accurate.

    I did 10 more miles @ ~40mph and noted my fuel efficiency had climbed back up to 31mpg. It had just reached 31mpg when I hit the next light. Then, while sitting at that traffic light, I watched my fuel efficiency drop to 29mpg before the light turned green.

    I know it will have a smaller effect over long distances, but still I don't want my fuel efficiency to be calculated based off of an efficiency of zero while I sit in traffic or at a stop light. I want to know how efficiently my car is moving, or how efficiently I'm driving. Some might argue that this is an accurate measure of fuel economy, but I disagree.

    I can't change this in the normal OBC, but the OpenOBC should allow me to adjust for a more 'realistic' fuel economy by ignoring all fuel economy readings of zero (when my speed is zero).
    Some people might also say that there is the flip side to this which is that you get 99+mpg when coasting down hill in 5th gear with no accelerator. That's true, I ALSO don't want that number used in my fuel efficiency measurement. Coasting forward while the car is simply idling is not an accurate measure of fuel efficiency either. So if any value of 99mpg is achieved, I want that to be ignored as well.

    Writing some code to ignore 0mpg (when the speed is 0 but fuel used is >0) and 99mpg measurements (when speed >0mph but fuel is 0) doesn't seem like a hard thing to do, but how its implemented is another thing I'd like to make mention of... I'm sure there is some setting file that this could be adjusted in, to enable or disable this 'realistic' MPG mode, but I would really like it to be able to be programmed from the OBC, similar to the hidden test functions. Something similar to "Original method" vs "Ignore 0mpg" vs "Ignore 0&99mpg".

    Please tell me this is possible and do this.

    Also, for those of you interested in my results:
    1995 M3
    36°F average temperature
    225/45/16 snow tires @ 39psi all around
    Full spare & trunk full of luggage (~100lbs)
    Full tank of gas @ start
    Route : upstate NY (finger lakes) to NYC & back
    Speed : Fuel Efficiency (30 mile average)
    55mph : 30.0mpg
    65mph : 28.2mpg
    75mph : 26.5mpg
    80mph : 25.3mpg



    ------- ASIDE -------

    I also note a few other things about the original OBC.

    - The original OBC would display any check errors for 30s or so when the error is first discovered - such as "Lic Plate Failure" when you turn on your lights. If you tried to select any other function measurement (like temperature) you were ignored, and you had to wait for the error display to end before you can ask to display some other measure (temp, range, etc). It would be great if you could hit a function and get instant access to that function without being required to view the error for 30 seconds.

    - The original OBC would keep the two side arrows lit up on the display for as long as there was an error that it was detecting.

    - The original OBC would chime when the temperature fell to below 38°F, and would show the temperature on the display, to warn that (with wind-chill factor) the temperature was approaching freezing, and caution against black ice. I'm not sure how much the temperature had to rise before this alert was reset, but it would be nice if it were a programmable feature.
    1995 OBD I Cosmos Black M3 - RIP: gone but not forgotten

  14. #1489
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    BMW M3
    There is consum1 and consum2 on the OBC so one measures a shorter range fuel economy and the other measures on longer terms and does not change that often. For a live update of the fuel economy while driving I always can look at the analog fuel economy gauge located in the instrument cluster.

  15. #1490
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    98 m3
    Didnt read that whole post but youd be better off only taking readings from rpm greater than say 750 or 800... Simple clean.
    1989 535i - sold
    1999 M3 Tiag/Dove - sold
    1998 M3 Turbo Arctic/black - current
    2004 Built motor TiAg/Black - Sold
    2008 E61 19T Turbo-Wagon - current
    2011 E82 135i - S85 Swap - current
    1998 M3 Cosmos S54 swapped Sedan - current

    1998 Turbo: PTE6870 | 1.15 ar | Hp Cover, Custom Divided T4 bottom-mount, 3.5" SS exhaust, Dual Turbosmart Compgates, Turbosmart Raceport BOV, 3.5" Treadstone Intercooler, 3.5" Vibrant resonator and muffler, Arp 2k Headstuds | Arp 2k Main studs | 87mm Je pistons | Eagle rods | 9.2:1 static compression, Ces 87mm cutring, Custom solid rear subframe bushings, Akg 85d diff bushings, 4 clutch 3.15 diff, , Poly engine mounts, UUC trans mounts W/ enforcers, 22RPD OBD2 Stock ECU id1700 E85 tune, 22RPD Big power Transmission swap w/ GS6-53

  16. #1491
    Join Date
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    SoCal
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    89 325iS, 95 M3
    Sorry for the long delay; I've been messing around with tpm sensors.

    I've had similar thoughts about tracking fuel consumption. It's just going to be a matter of setting up an interrupt if the speed or fuel usage is 0. I want to implement multiple consumption menu options as follows:

    consum1 = instantenous fuel consumption (I have a euro cluster with an oil temp gauge hooked up)
    consum2 = ignore 0 and 99 fuel consumption
    consum3 = only functional if a distance countdown has been entered

    I'll try coding it out and playing on my Open OBC.

  17. #1492
    Join Date
    Oct 2006
    Location
    Belgium
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    25
    My Cars
    E36 318IS
    if open obc can read I-bus message we can use RDC module from E38 for tyre pressure monitoring

  18. #1493
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    USA
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    BMW M3
    I'm still using the stock OBC, here are pictures showing live car system voltage values while driving.
    Can someone please post few pictures of openobc functions on the display, the functions that are not available in stock OBC.



  19. #1494
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    Quote Originally Posted by M3C View Post
    I'm still using the stock OBC, here are pictures showing live car system voltage values while driving.
    Can someone please post few pictures of openobc functions on the display, the functions that are not available in stock OBC.


    Dude... i even posted a video of the features working. Not inside the car but still.

  20. #1495
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    Holland, bish!
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    Quote Originally Posted by daandaman View Post
    'Openobcfirststartup.mp4' bekijken op YouTube - https://www.youtube.com/watch?v=rU07...e_gdata_player

    Posted from my phone. Forgot to push memo a couple of times for g force measurement.
    Here

  21. #1496
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    USA
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    BMW M3

    Obc

    Quote Originally Posted by daandaman View Post
    Here
    I'm aware of that video but all I see there are the same functions that are available in stock form OBC (distance, consum, voltage, limit, etc). the only difference I noticed is 0-100 km/h but even that is showing zero because the OBC is not mounted in the car, I wanted to see these values from someone who is already using in their car and how accurate-reliable it is, are any updates or upgrades or adjustments expected?
    What I'm trying to explain is that there are more potential buyers but we need to see the functions that are not available in stock OBC, how many of them and how they perform? Again not the functions that are already available with stock OBC but new additional functions.

  22. #1497
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    Dec 2011
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    Euro e36 M3 3.2 cabrio
    There arent many 'new' functions, just heaps of potential ones. It is open source and only when people will start developping there will be something to see. I'd like to know how many openobc's are sold till now?

  23. #1498
    Join Date
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    Vancouver, B.C., Canada
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    '97 M3
    M3C,

    I like the individual warning lights for your gauges.

    Sent from my GTX3582R
    '97 M3, Estoril blue, 2 dr, euro 6-spd, EFR 9180 divided T4 .92 IWG, RK tuning, CP 8.5:1 pistons, Eagle rods, Schrick cams, L19 11 mm ARP studs, O-ringed block, Supertech stainless/inconel valves, Supertech springs & Ti retainers, ported head, S54 oil pump/pan, 80 lb. injectors, OBD1 intake manifold, Steedspeed twin scroll T4, 3.5" SS exhaust, eBoost2 EBC, HFS-4 W/M injection, AEM Failsafe, Zeitronix data logger, Racelogic TC, OpenOBC w. ethanol %, Ireland Eng. engine mounts, UUC black tranny mounts w. enforcers, UUC twin disc feramic, ARC-8's, MCS 2-ways, Z3 rack, Rallyroad strut bar, X brace, Eibach sway bars, Ground Control LCAB bushings, Bimmerworld RTAB's, Powerflex subframe bushings, 210 4-clutch LSD, Stoptech BBK, titainium shims, steel braided lines, brake cooling ducts.

  24. #1499
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    USA
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    BMW M3
    Quote Originally Posted by chikinhed View Post
    M3C,

    I like the individual warning lights for your gauges.

    Sent from my GTX3582R
    They are visual and audio as well via gong, for low engine oil pressure and high water & engine oil temps.

  25. #1500
    Join Date
    Mar 2006
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    NJ
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    1998 328is, 2006 330ci ZHP
    Been looking through the source code but I'm still finding my way around. Few questions:

    1) Does the clock AM/PM indicator work? All the pics I've seen have either shown 12 hour time with no indicator or 24 hour time.

    2) How do you set the clock? The usual way with set and the number keys? I was looking at some code that appeared to indicate the number keys were no-ops.

    3) Is the backlighting on "full" all the time or does it respond to changes in ambient light? And for that matter, how does the OBC determine ambient light to adjust the backlighting in the stock unit? Is that a signal from elsewhere or is there a sensor in the OBC display itself that we are (at least theoretically) reusing?

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