LoRaWAN^TM Overview

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This page contains information such as, application examples, document references, and tips related to STM32 Bluetooth® Low Energy protocol.

1. LoRaWAN^® overview

1.1. What is LoRaWAN^® ?

This section provides a general overview of LoRaWAN® , particularly focusing on the LoRaWAN^® end device. LoRaWAN^® is a type of wireless telecommunication network designed to allow long-range communication at a very low bit rate and enabling long-life battery-operated sensors and actuators. LoRaWAN^® defines the communication and security protocol ensuring interoperability with the LoRaWAN^® network. Table 3 shows the LoRaWAN^® class usage definition.

Class name	Intended usage
A - All	Battery-powered sensors or actuators with no latency constraint Most energy-efficient communication class Must be supported by all devices
B - Beacon	Battery-powered actuators Energy-efficient communication class for latency controlled downlink Based on slotted communication synchronized with a network beacon
C - Continuous	Main powered actuators Devices that can afford to listen continuously No latency for downlink communication

1.2. LoRaWAN^® Network architecture

The LoRaWAN^® network is structured in a star of stars topology, where the end devices are connected via a single LoRaWAN^® link to one gateway.

Note: While the physical layer of LoRa^® is proprietary, the rest of the protocol stack (LoRaWAN^® ) is kept open and its development is carried out by the LoRa Alliance^® .

The STM32WL series^[1] is the ideal MCU family for developing Long Range sub-gigahertz application such sensors and transmit information to central devices.

1.3. LoRaWAN^® Gateway

A Gateway is required in a LoraWan Network. It is the interface bettwen LoraWan End Device and the Cloud. A Gateway is basically converting Lora ^® packet from/into an udp packet to the cloud.

Other Gateway:

And many more exists out there!

2. Wiki LoraWan^®: pages breakdown

STM offers different devices and hardware tools to evaluate and develop a LoraWan^® End-Device. STMicrolectronics LoRaWAN Products are shown here here. The choice depends on the customer constraint and AN5408: Migrating from STM32L0, STM32L1, and STM32L4 Series associated with SX12xx transceivers to STM32WL Series microcontrollers can help customer to choose.

STM32WL Ecosystem
- Cube Software setup
- Hardware setup

I-CUBE-LRWAN: LoRaWAN software expansion for STM32Cube
- B-L072Z-LRWAN1: STM32L0 Discovery kit LoRa, Sigfox, low-power wireless
- I-CUBE-LRWAN

3. Getting started with STM32WL Series and LoRaWAN^®

The device architecture leverage state-of-the art STM32 ultra-low-power process node and is available from 64KB up to 256KB of Flash memory and up to 256 KB of SRAM.

Various packages are available: UQFN48, BGA73.

The evaluation board is the NUCLEO-WL55JC integrating stm32wlxx, ST link, LEDs, Buttons and a Arduino connector.
The Nucleo exists in 2 frequency bands:

Nucleo Reference	Description
NUCLEO-WL55JC1	High Band
NUCLEO-WL55JC2	LowBand

On the software side, the STM32CubeWL MCU Package^[2] provides a software solution to allow customers to quickly and easily develop their own firmware thanks to:

several LoRaWan^® certified applications
several Radio Application

THe STM32CubeWL Software Package can also be found on Github here

4. STM32WL learning center

4.1. STM32WL LoRaWAN^®

STM32WL Online Training

This training set introduces the STM32WL and ecosystem

4.2. STM32WL MOOC (massive online courses)

LPWAN theory
Learn main principles concerning LPWAN protocols

STM32CubeMonitor: how to perform RF functional tests on STM32WL MOOC
Learn basic principles concerning STM32WL55 RF parameters monitoring using STM32CubeMonitor

STM32WL security MOOC
Learn main principles concerning security within STM32WL family and LoRaWAN