  A large-area Silicon Drift Detectors (SDDs) system has been developed by the
SIDDHARTA2 collaboration for high precision light kaonic atoms X-ray
spectroscopy at the DA{\Phi}NE collider of Istituto Nazionale di Fisica
Nucleare - Laboratori Nazionali di Frascati. The SDDs geometry and electric
field configuration, combined with their read-out electronics, make these
devices suitable to perform high precision light kaonic atoms spectroscopy
measurements in the high background of the DA{\Phi}NE collider. This work
presents the spectroscopic response of the SDDs system during the kaonic helium
first exotic atoms run of SIDDHARTA-2, preliminary to the kaonic deuterium data
taking campaign
