  Multiple LPWANs have been rolled out to support the variety of IoT
applications that are crucial to the ongoing digital transformation. These
networks vary largely in terms of quality-of-service, throughput and
energy-efficiency. To cover all LPWAN use-cases most optimally, multiple
networks can be combined into a multiple radio access technology (multi-RAT)
solution. In particular environmental monitoring in both smart city and remote
landscapes. We present and share such a multi-RAT platform. To derive an
accurate profile of the multi-RAT opportunities in various scenarios, in
the-field network parameter are monitored. The platform collects per-packet
energy-consumption, packet delivery ratio (PDR) and other parameters of
LoRaWAN, NB-IoT and Sigfox. Our preliminary measurements demonstrate the
validity of using a multi-RAT solution. For example, we illustrate the
potential energy savings when adopting multi-RAT in various scenarios.
