Fecha de publicación: 25/12/2018 Fuente: Wipo "IOT" The utility model provides a NB ioT module development board, include: USB interface, power management unit, USB UART bridge unit, serial ports level switching unit, NB the ioT module, the USB interface is used for being connected with outside USB equipment, and externally USB equipment acquires the electric energy, power management unit and USB electrical connection interface for acquire the electric energy from the USB interface, power management unit respectively with USB UART bridge unit, serial ports level switching unit, NB ioT module electricity is connected, serial ports level switching unit and NB the UART electrical connection interface of ioT module. The utility model discloses a NB ioT module development board conveniently externally USB equipment acquires the electric energy,can improve outer field test's efficiency greatly.