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P38A tapping into BECM signals with an arduino

Discussion in 'Range Rover' started by TallPaulB, Aug 28, 2018.

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  1. Datatek

    Datatek Well-Known Member

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    Totally reliable and no electronic jiggery pokery to give you grief:D
     
  2. tomcat59alan

    tomcat59alan Well-Known Member

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    I would have said ,according to the last part of his post he was being pedestrian Tony.:D
     
  3. wammers

    wammers STILL BREATHING. Donater

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    Nothing worse than a pedantic pedestrian. ;):D
     
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  4. Mark Piercy

    Mark Piercy Well-Known Member

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    On a mobility scooter!!:eek:


    No offense to anyone who has one:p
     
  5. wammers

    wammers STILL BREATHING. Donater

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    I have one of them, lad bought it me. Buggered without it going up and down to my garage to be fair. :D:D
     
  6. Mark Piercy

    Mark Piercy Well-Known Member

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    Is it a V8 or diesel wammers?:cool:
     
  7. wammers

    wammers STILL BREATHING. Donater

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    Lectricery.
     
  8. Mark Piercy

    Mark Piercy Well-Known Member

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    See if our bloke can tap into its becm??o_O
    You might get folding mirrors out of it:D:p
     
  9. wammers

    wammers STILL BREATHING. Donater

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    Can manage the mirrors. Can't see that a phone call at 3 AM that you had left the lights on would go down to well either if you forgot to switch them off at 10 o'clock. I tend to be able to detect if the lights are on or not. 25 mile range and 8 MPH terminal speed, it's a doozer. :D:D
     
  10. kds

    kds Well-Known Member

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    Wow 25 mile range, thats a bloody long bit of cable its got on it.
     
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  11. wammers

    wammers STILL BREATHING. Donater

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    Fortunately it uses batteries and not a mains lead. :D
     
  12. kds

    kds Well-Known Member

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    So do you tow a genny behind it then to top up the batteries, I`m just checking out the options for when I get mine.
     
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  13. biketeacherdave

    biketeacherdave Well-Known Member

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    Why........just why ?
     
  14. Grrrrrr

    Grrrrrr Jedwood Spannerhands

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    Because he's too ****ed to walk to the garage.

    [EDIT: doesn't like ****ed so we'll say inebriated.]
     
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  15. TallPaulB

    TallPaulB Active Member

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    So.... I went with just checking if the ignition is on to trigger fold / unfold (there's also a button you can press)

    https://photos.app.goo.gl/qshLHKa2wYzqBdB1A

    They're Discovery 2 mirrors. If you saw off the bottom half of the ally bracket it slides nicely into the plastic bit from the P38, then it's just a case of wiring it all up. I used an Arduino and a couple of relays for that.
     
  16. Pete The Biker

    Pete The Biker Active Member

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    Good work. And don't let anyone put you off your investigations - if you don't explore you don't learn. Andy by exploring you have proved that electric folding mirrors can work - so onwards and upwards!

    Pete
     
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  17. pwood999

    pwood999 Well-Known Member

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    Should have done pictures to show which bit you "sawed off" !!
     
  18. TallPaulB

    TallPaulB Active Member

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    It's pretty straightforward, the disco 2 bracket tapers from the outside to the inside (nearest the car is thickest). You just need to cut the whole thing down so it's one thickness, start with your blade flush to the bottom of the bracket at the outside edge and cut downwards so you're cutting the taper off.

    If anyone's got a broken wing mirror off a discovery II they want to send me I can do it again and take pictures :)
     
  19. pwood999

    pwood999 Well-Known Member

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    Was also wondering why you used Arduino rather than £15 disco Ecu ?
     
  20. TallPaulB

    TallPaulB Active Member

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    The Arduino board I got for £3? Hmm...
    Seriously though I did buy an ECU and switch from a disco but a) the switch isn't debounced, so it's a pain to consistently press it for just the right amount of time. b) it doesn't trigger with ignition on / off (as far as I know) and c) the connectors are a pain to source so you either have to make your own connectors or do some fiddly soldering on the switch and the ecu.

    Also the Arduino has 5 or so GPIOs spare, and WiFi in case I want to do anything else with it.

    This is the board I used:
    https://m.ebay.co.uk/itm/UK-NodeMcu...490456?hash=item3d71565d58:g:VsMAAOSwkY9bfibJ
     
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