  The CALICE Semi-Digital Hadronic CALorimeter (SDHCAL) is the first
technological prototype in a family of high-granularity calorimeters developed
by the CALICE Collaboration to equip the experiments of future lepton
colliders. The SDHCAL is a sampling calorimeter using stainless steel for
absorber and Glass Resistive Plate Chambers (GRPC) as a sensitive medium. The
GRPC are read out by 1~cm $\times$ 1~cm pickup pads combined to a
multi-threshold electronics. The prototype was exposed to hadron beams in both
the CERN PS and the SPS beamlines in 2015 allowing the test of the SDHCAL in a
large energy range from 3~GeV to 80~GeV. After introducing the method used to
select the hadrons of our data and reject the muon and electron contamination,
we present the energy reconstruction approach that we apply to the data
collected from both beamlines and we discuss the response linearity and the
energy resolution of the SDHCAL. The results obtained in the two beamlines
confirm the excellent SDHCAL performance observed with the data collected with
the same prototype in the SPS beamline in 2012. They also show the stability of
the SDHCAL in different beam conditions and different time periods.
