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Thread: Anyone here that can make Android Apps (Radio)?

  1. #11
    And then I was mod. Tidder's Avatar
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    Thanks for coming in and commenting on it Mal. I know I can always count on you for cool stuff like this.
    Tidder

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  2. #12
    Constant Bitrate
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    I will be trying some coding this weekend if all goes well. I got my bluetooth device for 8$ shipped from ebay so if it doesnt work I dont realy care . I will let you guys know how it goes.

  3. #13
    Maximum Bitrate jmullan99's Avatar
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    Looking forward to the results. Mitch confirmed to me that the DTR line IS necessary to power up/down the radio. You might need to jumper that signal at the radio so it always comes up powered on. Not sure if that would work. My research on BT/RS232 devices shows most of the cheap ones don't support this signal line. I wish you success and looking forward to the results.
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  4. #14
    Constant Bitrate Lankin's Avatar
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    davedave, did you ever get around to doing any testing?

  5. #15
    Constant Bitrate
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    Not really, but I did get it wired so I guess that's something. Needed to find a cable that I didn't mind cutting the end off of since I wasn't about to kill the display unit. I will hopefully get to this again this weekend.

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  6. #16
    Maximum Bitrate
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    If the DTR line is required to turn this unit on this should be relatively easy. All you need to do is find the right size Resistor, tie it to one side of a Normally Open relay, tie the other to a power source to the radio unit and then have the control lines feed off whatever you want to switch it on and off. You could have it turn on and off with the Android unit pretty easily. Since it doesn't DO anything until it is connected to this would be the simplest way to do this I would think and you do it with a resister, relay and some wire. Fine out what voltage you need to drop to make the DTR line work right. It is probably something like 3.3 volts but you will want to look it up and don't assume.

  7. #17
    Maximum Bitrate jmullan99's Avatar
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    Hmmm. Yes, I can see that as possibly working. In a couple weeks I will begin playing with the making a (very) simple app to see if I can talk witha my visteon unit. Have to order and wait for the BT unit. Not sure, but RS232 signals are +/- 12V so if the radio follows the standard, I would think I merely need to apply the IGN signal to the DTR line.

    Any thoughts on that? Before I blow up my radio box :O
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  8. #18
    Constant Bitrate
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    http://www2.dasilvas.info/hd-radio
    That site gives a lot of info, including the resistor info and a basic circuit for it.

    Sent from my Galaxy Nexus using Tapatalk 2

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