windows phone 7 - How to use the headphones jack to send data to a circuit board in WP7 or WP8 -

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I just wanted to know that a circuit board such as arduino or custom circuit board through headphone jack that handles serial communication Or something like that

if

this is possible, but something There are a lot of warnings - headphone jacks are not unique resources by grouping all these facts, audio playback, and detail.

  • Sound will not be too likely to be included in any "normal" phone sound
  • Good discrimination against "incorrect" received board "Frequency"
  • The above properties reduce bandwidth to achieve some baud

    In addition to this, simplifying connections, you should consider idempotency And send each order twice or more to increase reliability.

    How?

    Just play back the right sound in the right sequence for an order (maybe idempotently repeating), the received sounds decode the sounds and act accordingly.

    We have done this successfully with Android, but I do not think there should be any difference with WP, because playing sound file is a very basic operation.

    Four of our implementations (for / off device), there were N + 4 different precreated sounds:

    • "Start command" - if played
    • "Log in" command
    • "Log in"
    • "Execution" - Finally

      All of these can be repeated without side effects.

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