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Thread: Pioneer Wired remote control

  1. #11
    Fusion Brain Creator 2k1Toaster's Avatar
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    That's the plan. I don't know if it would be easier to build logic to interface with a custom keyboard circuit, or directly with the serial port.

    You cannot send resistive values down a serial line by simp-ly sending the raw data. It is either high or low. 3.3v is the threshold i think. (Been a while since I messed with the serial port!). So if you send a 4v, and 4.2v and 4.4v it is all interpretted as a logic high ("1").

    So you will need to convert that analogue signal into a digital stream and send it in synchronously. It could be quite a bit of work. If you have a PIC programmer, then the job could be a lot easier. It might even be worth getting an el-cheapo PIC programmer second hand or eBay or something, and coding it. You could always sell it on ebay once you're done with it.

    That way it is more software coding than hardware wiring.

    To communicate with the keyboard circuit, it would need to be something along the same lines, but the interpretation will be harder. With software you can say from value 1 to value 2, make it equal button 1. Hardware, you need to do that will be a comparator circuit between the input and both value 1 and value 2. If both less than value 2 and greater than value 1, then button 1. Lot's more chips if you don't have a PIC!
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  2. #12
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    Hi, first post here and I know it was posted 6 months ago but just wanted to say how useful this thread has been! I'm going to be creating a wired remote control out of my 14 year old tape player (using the buttons on the front of it) to control a new pioneer DEH-2920MP mounted out of sight in the glovebox, to deter the thieving scum round here who stole my last lot .
    I've just been and tested the resistor chain mentioned (on a DEH-2920MP) and it's all spot on, but I'll fill in one of the gaps:
    6.6k Ω List(Disp) (No apparent effect)
    This changes the display - in (FM) radio mode it changes between frequency, station name (from RDS) and station type (also from RDS), and in CD mode with an mp3 CD in it switches through various info including track title, artist name, file name, folder name and a few more. I couldn't see any effect for 33.6k either.

    Anyway thanks.

    Ray

  3. #13
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    Is it possible for someone who tried it to explain the connection of the two signals KEYAD and KEYD.

    How this resistors must be connected ?
    GND + KEYD (for some controls like volume, mute...)
    GND + KEYAD (for other controls scan, band...)

  4. #14
    Low Bitrate FordNoMore's Avatar
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    Just wanted to add that (at least on my Pioneer deck) the resistance values appear to be "maximums" more or less... For instance, any resistance from about 6.8k - 8.8k connected between the tip and sleeve seems to work as "Seek Up". At about 9.0k it's unpredictable, and from about 9.2k up it begins treating it as "Seek Down". So err on the low side of resistor values!

    Also, I'll vouch that my Pioneer Premier DEH-P860MP works as described above.

  5. #15
    Low Bitrate FordNoMore's Avatar
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    Quote Originally Posted by evdokimosk View Post
    Is it possible for someone who tried it to explain the connection of the two signals KEYAD and KEYD.

    How this resistors must be connected ?
    GND + KEYD (for some controls like volume, mute...)
    GND + KEYAD (for other controls scan, band...)
    To clarify things a little: All resistor values listed above are to be connected between the tip and sleeve of the 1/8" plug (stereo headphone plug). Apparently the only use for the ring is that if you connect it to the sleeve the "Seek" buttons cycle through radio preset stations rather than directly tuning. Do NOT connect 12V to anything!!!

  6. #16
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    Hi, first post

    Sorry this topic is really old, but it came up on a google search and has been very usefull!

    Im looking at making my own steering wheel controls for my Pioneer headunit which has the wired remote socket.

    I think i understand everythink that is said about the resisters, for each button pushed it goes down a different resister and it does its thing.

    What im not sure about though is when you say about GND + KEYD and GND + KEYD, what do you mean by this??

    Also its by the use of a stereo headphone jack, the end is left channel, middle is right channel and back end is ground, but you only talk about 2 conections, what ones are used??

    Hope its ok to bring this back up and hope you can help.


    Many thanks

    Mark.

  7. #17
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    bump

  8. #18
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    has anyone had any luck using a remote like this to control their media? i have a sony wired remote from my minidisc deck that i would love to retain when i install a carpc. could this be used with a fusion brain or some other interface to the pc?

  9. #19
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    Hello everyone,

    I'm driving a Rover StreetWise and use a Pioneer DEH-P55BT... I already have a hard wired remote control standard on my car, but I used to had a Sony radio. With the Sony radio all buttons worked: vol+, vol-, track+, track-.
    With my Pioneer radio, vol+, vol- and track- work fine, but when I press track+ it's the same as track-... So I am not able to skip to the next track which is really
    Can I make some kind of simple modification myself to make it work? I don't want to buy a Pioneer car adapter of €50 just to be able to skip to the next track...

    Thanks in advance!

  10. #20
    Low Bitrate FordNoMore's Avatar
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    Quote Originally Posted by screech View Post
    Also its by the use of a stereo headphone jack, the end is left channel, middle is right channel and back end is ground, but you only talk about 2 conections, what ones are used??
    See my post above.... "All resistor values listed above are to be connected between the tip and sleeve of the 1/8" plug (stereo headphone plug). Apparently the only use for the ring is that if you connect it to the sleeve the "Seek" buttons cycle through radio preset stations rather than directly tuning."

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