As one of the interfaces on mobile devices and tablets, the key function of the audio jack is to play music. However, its other usage cannot be ignored—the audio jack can also be used to transmit data.
More usages of the audio jack to connect devices are being developed all the time. Peripherals like iHealth Lab’s Glucometer (blood sugar calculator), the Irdroid (provides infrared remote functions to control TVs, set-top boxes, and audio components), and Flojack*, an NFC reader (creates near-field-communications functionality for interaction with NFC tags or mobile devices) are made possible through audio jack connectivity.
Since wearable devices and peripherals have broad market prospects, I believe that the audio jack will be the prime data communication portal. In this article I will explain more details of this new feature.
- See more at: http://www.digit.in/apps/using-the-audio-jack-as-data-interface-on-android-systems-25739.html#sthash.qW4r1BGc.dpuf