The NB-IoT-DevKit from Olimex is an IoT board with BC-66 LTE GSM module covering all worldwide GSM bands. The board includes a built-in LiPo battery port and charging circuit, Nano SIM holder, level shifters, status LEDs and a micro-USB connector. NB-IoT (Narrowband Internet of Things) technology is a direct competitor to LoRaWAN and SigFox and has a few advantages: * Higher speed 25.5 kbps up and downlink * Single GSM cell can connect to up to 100 000 NB-IoT nodes * Single GSM cell can cover up to 10-100km rural and 1-10km urban distance * Can work up to 10 years on a Lithium 3V battery if less than 200 bytes are sent per day Note: All GSM cells which work with LTE can also support NB-IoT, but this requires new protocol installation and licensee fee, so not all operators provide it by default. You have to check with your local GSM operator if they offer NB-IoT. Also, the SIM card must have this protocol enabled. SIMs with LTE may or may not work with NB-IoT, this depends on your operator. Features * BC-66 - worldwide GSM bands coverage * NB-IoT 25.5 kbps up and downlink * Ultra-low power design: only 126 uA consumption in PSM mode * Built-in Li-Po battery charger * Micro-USB connector * Nano SIM * Level shifters for 5 x GPIOs, I2C, SPI, UART * Micro UEXT connector * U.FL antenna connector * Status LEDs * Dimensions: 40 x 25mm Resources Documents * NB-IoT review at RuseConf2019 * Pinout * EU Declaration of Conformity * UKCA Declaration of Conformity Hardware * Schematic * GitHub Software * GitHub repository with Arduino and PlatformIO examples for BC-66 and NB-IoT-DevKit * Firmware flasher and latest firmware USB Drivers * USB driver for Windows * USB driver for Linux (for old kernels; pre-3.14.x) * USB driver for Mac * USB driver for Android Package Contents * 1x NB-IOT Development Board https://elecena.pl/product/23769039/olimex-nb-iot-devkit-development-board-bc-66 2023-07-11 https://elecena.pl/product/23769039/olimex-nb-iot-devkit-development-board-bc-66 2023-12-27 https://elecena.pl/product/23769039/olimex-nb-iot-devkit-development-board-bc-66 2024-09-18 https://elecena.pl/product/23769039/olimex-nb-iot-devkit-development-board-bc-66 2024-11-29 https://elecena.pl/product/23769039/olimex-nb-iot-devkit-development-board-bc-66 2024-11-30 https://elecena.pl/product/23769039/olimex-nb-iot-devkit-development-board-bc-66 2025-11-28 https://elecena.pl/product/23769039/olimex-nb-iot-devkit-development-board-bc-66 2025-11-29