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1. What is Cellular LTE CatM and NBIoT
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Narrowband IoT (NB-IoT or LTE Cat NB1) is a low-power wide-area network (LPWAN) radio technology standard developed to enable a wide range of devices and services to be connected using cellular telecommunication bands. It is one of a range of Mobile IoT (MIoT) connectivity technologies standardized by the 3rd Generation Partnership Project (3GPP) which also includes enhanced Machine-Type Communication (eMTC or LTE Cat M1) and EC-GSM-IoT particularly designed to fit Internet of Things (IoT) and machine-to-machine (M2M) communications.
2. Getting started with STM32 and Cellular LTE CatM and NBIoT
Hardware point of view, STMicroelectronics offers various possibilities to setup a STM32 with Cellular connectivity solution:
- P-L496G-CELL01: Kit with a screenless 32L496GDISCOVERY Discovery board and a STMod+ board with the UG96 modem
- P-L496G-CELL02: Kit with a screenless 32L496GDISCOVERY Discovery board and a STMod+ board with the BG96 modem
- B-L475E-IOT01A IoT Discovery board and add-on board with Quectel BG96 modem
- B-L475E-IOT01A IoT Discovery board and add-on board with Sequans® GM01Q modem
- 32L496GDISCOVERY Discovery board and modem board based on Sequans® GM01Q or Quectel UG96 or BG96 modem
Note that to connect STMod+ board to B-L475E-IOT01A IoT Discovery board an Arduino / STMod+ adapter (X-NUCLEO-STMODA1) is needed because this board does not have STMod+ connector
Sotfware side, the X-CUBE-CELLULAR (X-CUBE expansion package) provides a SW solution to allow customers to quickly and easily develop their own Firmware.
- Based on FreeRTOS
- Users can decide to use either IP stack in the modem or in STM32 (LwIP)
- Menu and command line through Virtual COM UART over USB ST-LINK to configure the cellular connectivity parameters (technology selection, bands, APN, and others), and connection to the cloud IoT platform (HTTP or MQTT)
Several applications are provided as examples:
- PING application to test the access to a remote machine
- ECHO application to provide an example of connection and data exchanges using the TCP or UDP (connected or not-connected mode) socket protocols
- HTTP application to exchange data between the device and the cloud using HTTP protocol
- MQTT application to exchange data between the device and the cloud. On the cloud side, a dashboard is the interface with the end user
- COM application to test the access to other services than sockets provided by the COM library (such as read information from ICC)
- CUSTOM application, an empty application already pre-integrated in X-CUBE-CELLULAR. It is provided to ease customers development.
New HW setups and new features in X-CUBE-CELLULAR will be provided to customers according to the
Getting started with Cellular CELL01 & CELL02 kits:
How to get started with STM32 Cellular to Cloud discovery packs (P-L496G-CELL01, P-L496G-CELL02)
4. STM32 compliant with Cellular LTE CatM and NBIoT
The place to put a table with all STM32 compliant with the feature
5. Specific tools
Links and explanations for the tech domain dedicated tools
6. STMicroelectronics Resources
| Doc Number | Title |
|---|---|
| DB3582 | Cellular connectivity software expansion for STM32Cube |
| UM2567 | Getting started with the X-CUBE-CELLULAR cellular connectivity Expansion Package for STM32Cube |
| UL2426 | X-CUBE-CELLULAR cellular connectivity Expansion Package for STM32Cube |
7. Examples
The area where FAE's, collab... can put examples (linked to Github)