  In search for a connection between the formation of stars and the formation
of planets, a new semi-automatic spectral analysis method using \textsf{iSpec}
was developed for the TIGRE telescope installed in Guanajuato, Mexico. TIGRE is
a 1.2m robotic telescope, equipped with an Echelle spectrograph (HEROS), with a
resolution R $\simeq 20000$. \textsf{iSpec} is a synthetic spectral fitting
program for stars that allows to determine in an homogeneous way their
fundamental parameters: effective temperature, $T_{\rm eff}$, surface gravity,
$\log g$, metallicities, $[M/H]$ and $[Fe/H]$, and rotational velocity, $V \sin
i$. In this first article we test our method by analysing the spectra of 46
stars, host of exoplanets, obtained with the TIGRE.
