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  • Transmitting data from Android to Arduino through audio jack

    Well, I've done it: I put all things together and... it doesn't work.Than I tried to explore the source code and realized that Android speaks a language and Arduino understand another language... From the Arduino point of view, it is expecting a signal where every bit has the same duration (5 cycles for each bit);From the Android point of view, it is encoding the value with a "short white noise" for a ZERO value and a "long white noise" for a ONE. They are "speaking" two different protocols a "constant duration protocol" vs "variable duration protocol".Ivi, how can they understand one another?Another question for Ivi: why is there a game inside the apk, beside to the needed classes? I was surprised of 15mb apk, so I opened it and found a...see more »Well, I've done it: I put all things together and... it doesn't work.Than I tried to explore the source code and realized that Android speaks a language and Arduino understand another language... From the Arduino point of view, it is expecting a signal where every bit has the same duration (5 cycles for each bit);From the Android point of view, it is encoding the value with a "short white noise" for a ZERO value and a "long white noise" for a ONE. They are "speaking" two different protocols a "constant duration protocol" vs "variable duration protocol".Ivi, how can they understand one another?Another question for Ivi: why is there a game inside the apk, beside to the needed classes? I was surprised of 15mb apk, so I opened it and found a lot of garbages...

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