This whitepaper is for historical reference only. Some content might be outdated and some links might not be available.
Implementing LPWAN IoT solutions with MQTT
Using UDP and CoAP on MCU devices is recommended to improve power efficiency and ensure longer battery life. However, for use cases with a non-constrained devices or devices without long battery lifetime requirements, also MQTT and HTTP protocols should be considered, as described in the following sections.
Device telemetry ingestion
To ingest telemetry with MQTT and HTTP, customers can use FreeRTOS libraries and
OS-independent AWS IoT Device SDK for Embedded C. For customers who use FreeRTOS, AWS recommends
using FreeRTOS libraries ingest telemetry through JSON (using coreJSON library),
HTTP(S) (using coreHTTP library), MQTT (using coreMQTT library), and TCP sockets
(using Secure Sockets library). If using other operating system then FreeRTOS,
customers can also use AWS IoT Device SDK for Embedded C
Device commands
To send commands to the device, customers can use AWS IoT Device Shadow.
Interaction with AWS IoT Device Shadow is supported in FreeRTOS (refer to AWS IoT Device Shadow library) and OS-independent AWS IoT Device SDK
for Embedded C
Firmware updates
Device provisioning relates to the application workflow that provides unique identity and configuration data to the device. The provisioning layer is also involved with ongoing maintenance and eventual decommissioning of devices over time.
Firmware and over-the-air (OTA) updates without human intervention is critical for security, scalability, and delivering new capabilities to the IoT devices.
Customers using FreeRTOS can use OTA Agent library to
perform firmware upgrades on the FreeRTOS devices. If using operating systems other than
FreeRTOS, customers can use AWS IoT Over-the-air Update library
Implementing device provisioning
When you use AWS IoT fleet provisioning, AWS IoT can generate and securely deliver device certificates and private keys to your devices when they connect to AWS IoT for the first time. You can find the guidelines for implementing fleet provisioning on your MCU device in the Fleet Provisioning Documentation.
