Severin Kaderli
91978e22d9
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Signed-off-by: Severin Kaderli <severin@kaderli.dev>
29 lines
1.4 KiB
TeX
29 lines
1.4 KiB
TeX
\chapter{Solution}
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The solution consists of two separate applications: a website used for transmitting data and a smartphone application used for receiving data. Transmission between the two application happens using a simple protocol on top of magnetic induction.
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\section{Protocol}
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The main communication protocol works over magnetic induction. By putting load on a CPU the resulting magnetic field can be changed. Using a magnetometer in a smartphone these changes can be measured and interpreted.
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For simplification purposes the protocol in this project is used to transmit ASCII text but in reality any bit stream can be transmitted.
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To indicate the start of a message in the transmission a preamble is used. The preamble used in this protocol is 3 high signals, followed by 1 low signal, followed by 3 high signals.
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\subsection{Sending}
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\begin{enumerate}
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\item{Convert the text to an ASCII encoded bit stream}
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\item{Encode the ASCII bit stream using manchester encoding}
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\item{Start the transmission by sending the preamble}
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\item{Transmit the manchester encoded bit stream}
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\item{Repeat from step 3 until transmission is stopped}
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\end{enumerate}
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\subsection{Receiving}
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\begin{enumerate}
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\item{Detect the preamble}
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\item{Decode the received manchester encoded bit stream}
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\item{Convert the ASCII bit stream to text}
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\end{enumerate}
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\section{Website}
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\section{App}
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