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% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
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% Document Info
\author{djf}
\pdfinfo{
  /Title (iot-reversing-field-manual.pdf)
  /Creator (Cheatography)
  /Author (djf)
  /Subject (IoT Reversing Field Manual Cheat Sheet)
}

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\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
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    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{IoT Reversing Field Manual Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{djf} via \textcolor{DarkBackground}{\uline{cheatography.com/68878/cs/17477/}}}
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\noindent
\begin{multicols}{3}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}djf \\
  \uline{cheatography.com/djf} \\
  \end{tabulary}
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  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 11th September, 2020.\\
   Updated 11th September, 2020.\\
   Page {\thepage} of \pageref{LastPage}.
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  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
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\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Serial Protocols}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{\seqsplit{https://learn.sparkfun.com/tutorials/serial-communication} - Good Introduction% Row Count 2 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{UART}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Details}} \newline % Row Count 1 (+ 1)
`UART is a serial protocol used for interecting with the system. May return a shell, and or access to the filesystem. Seperate from JTAG.` \newline % Row Count 4 (+ 3)
{\bf{Enumerate Pinout {[}Multimeter{]}}} \newline % Row Count 5 (+ 1)
TX` - Voltage fluctuates at boot\textasciicircum{}1\textasciicircum{} from 0 to 3.3/5.5v` \newline % Row Count 7 (+ 2)
RX` - Constant low value below VCC and above GND` \newline % Row Count 8 (+ 1)
GND` - Voltage is constant 0, has 4 traces in a crosss shape\textasciicircum{}2\textasciicircum{}` \newline % Row Count 10 (+ 2)
VCC` - Normally not used to if device already powered, should not fluctaute`% Row Count 12 (+ 2)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{`\textasciicircum{}1\textasciicircum{} Fluctuation is caused from the debug messages being sent.` \newline `\textasciicircum{}2\textasciicircum{} Testing continuity of GND to other pins, shows other pins that may be grounded` \newline  \newline `Square outlined pin, normally is "pin 1"`}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{JTAG}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Details}} \newline % Row Count 1 (+ 1)
`Used for on-chip-debugging, generally allows for access to a GNU Debugger (GDB) for the JTAG host. Pinout for hidden console may be found with JTAGenum/JTAGulator. Then access GDB with a Bus Pirate or Shikra USB-to-Serial devices and debug applications using OpenOCD software.`% Row Count 7 (+ 6)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Accessing Serial Consoles}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{BASH}} \newline % Row Count 1 (+ 1)
`sudo dmesg | grep -iC 5 usb` \newline % Row Count 2 (+ 1)
`sudo screen -L /dev/ttyUSB0 115200` \newline % Row Count 3 (+ 1)
`Alternatively, use the {\bf{Arduino IDE}} serial console. Useful when input is off with the screen utility`% Row Count 6 (+ 3)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{`In the screen command, 115200 is the baud rate of the serial communications` \newline  \newline `The baud rate can be determined using -` \newline `https://github.com/devttys0/baudrate.git`}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.04 cm} x{4.96 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Hardware Physical Tools}}  \tn
% Row 0
\SetRowColor{LightBackground}
JTAGulator & Identifies JTAG \& UART pinouts. \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
JTAGenum\textasciicircum{}1\textasciicircum{} & Identifies JTAG pinouts \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Bus Pirate\textasciicircum{}2\textasciicircum{} & FT232RL - USB to Serial, Use SOIC8 Clip to dump firmwarez \tn 
% Row Count 6 (+ 3)
% Row 3
\SetRowColor{white}
Shikra\textasciicircum{}3\textasciicircum{} & FT232H(Q) - USB to Serial \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
RS-232 Generic Adapter\textasciicircum{}4\textasciicircum{} & USB to Serial \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{`\textasciicircum{}1\textasciicircum{} JTAGenum Setup Tutorial: ` \newline `https://p16.praetorian.com/blog/jtagulator-vs-jtagenum-tools-for-identifying-jtag-pins-in-iot-devices` \newline `\textasciicircum{}2\textasciicircum{} Bus Pirate Pinout Information` \newline `http://dangerousprototypes.com/docs/Common\_Bus\_Pirate\_cable\_pinouts` \newline `\textasciicircum{}3\textasciicircum{} Shikra Pinout {[}UART{]} D0 - TX, D1 - RX` \newline `See also, Adafruit FT232H Breakout - ` \newline `https://cdn-learn.adafruit.com/downloads/pdf/adafruit-ft232h-breakout.pdf` \newline `\textasciicircum{}4\textasciicircum{} Male DB9: GND - Pin 5, TX - Pin 3, RX - Pin 2`}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}