  Solar flares are occasionally responsible for severe Space Weather events,
which can affect space-borne and ground-based infrastructures, endangering
anthropic technological activities and even human health and safety. Thus, an
essential activity in the framework of Space Weather monitoring is devoted to
the observation of the activity level of the Sun.
  In this context, the acquisition system of the Catania Solar Telescope has
been recently upgraded in order to improve its contribution to the European
Space Agency (ESA) - Space Weather Service Network through the ESA Portal,
which represents the main asset for Space Weather in Europe.
  Here, we describe the hardware and software upgrades of the Catania Solar
Telescope and the main data products provided by this facility, which include
full-disc images of the photosphere and chromosphere, together with a detailed
characterization of the sunspot groups. As a showcase of the observational
capabilities of the revamped Catania Solar Telescope, we report the analysis of
a B5.4 class flare occurred on 2020 December 7, simultaneously observed by the
IRIS and SDO satellites.
