Octopus IO-Board is an expansion to the Octopus SoM, which is built around the nRF9160 SiP offering NB-IoT and LTE-M connectivity, GPS and accelerometer. Octopus IO-Board expands the capabilities of the Octopus SoM by providing additional peripherals and interfaces for development and prototyping of low-power IoT applications. It has multiple power inputs: Li-Ion battery, solar cells, USB-C and alkaline battery. Power consumption optimization is simplified with built in solder bridges used for current consumption measurements of the whole system or specific parts of the Octopus IO-Board.