The SMARTebox nanoIO is a battery-powered IoT gateway for connecting external sensors, optimized with minimal energy consumption for long, autonomous operating times. Via the external input, a wide variety of measured variables such as temperature, humidity, fill levels, alarm contacts, or pulse inputs can be sent to the IoT cloud via NB-IoT (Narrowband IoT). This allows for the creation of extensive sensor networks to manage assets, equipment, and containers, for example.