Signetik SigCell IoT Cellular BLE USB Module is based on the Nordic nRF9160 LTE-M/NB-IoT SIP and the Nordic nRF52840. The nRF52840 is FCC, Verizon, and AT&T certified. The device is designed for intelligent IoT applications with the capability of interfacing host systems via the USB interface. The USB interface enumerates as two UARTs. The host can use the first UART to control the cellular connection via AT commands or Signetik’s API. Signetik’s API supports various IoT protocols like HTTP REST, CoAP/CBOR, MQTT, TLS, and more. The second UART is used with an HCI interface that is recognizable by most operating systems, out of the box.