\frametitle{Exemple de messages}
\scriptsize
\begin{columns}
  \begin{column}{0.5\textwidth}
  \begin{verbatim}
{
 "header":
  {
   "version": "0.2",
   "source": 39595606,
   "target": 16778244
   "devtype": "thermometer.queryable",
   "msgtype": "request",
   "action": "getstate",
   "cipher": "none",
   "signature": ""
  }
}
\end{verbatim}
  \end{column}

  \begin{column}{0.5\textwidth}
  \begin{verbatim}
{
 "header":
  {
   "version": "0.2",
   "source": 16778244,
   "target": 39595606,
   "msgtype": "reply",
   "devtype": "thermometer.queryable",
   "action": "getstate",
   "cipher": "none",
   "signature": ""
  },
 "body":
  {
    "temperature": 9.3000000000000007
  }
}
\end{verbatim}
  \end{column}
\end{columns}