Samples for the Azure IoT device SDK for C
This folder contains simple samples showing how to use the various features of the Microsoft Azure IoT Hub service from a device running C code.
- When using low level samples (iothub_ll_*), the IoTHubDeviceClient_LL_DoWork function must be called regularly (eg. every 100 milliseconds) for the IoT device client to work properly.
List of samples
Simple send and receive messages:
- iothub_ll_telemetry_sample: sends messages from a single device
- iotedge_downstream_device_sample: sends messages from a single device to an IoT Edge device
Multiplexing send and receive of several devices over a single connection (useful in Gateway scenarios where multiplexing might be needed):
- iothub_client_sample_amqp_shared: send and receive messages from 2 devices over a single AMQP connection
- iothub_ll_client_sample_amqp_shared: send and receive messages from 2 devices over a single AMQP connection using the lower level API set of the SDK
- iothub_client_sample_amqp_websockets_shared: send and receive messages from 2 devices over a single AMQP over Websockets connection
- iothub_client_sample_http_shared: send and receive messages from 2 devices over a single HTTP connection (multiplexing) (useful in Gateway scenarios)
Device services samples (Device Twins, Methods, and Device Management):
- iothub_client_device_twin_and_methods_sample: Implements a simple Cloud to Device Direct Method and Device Twin sample
- iothub_client_sample_mqtt_dm: Shows the implementation of a firmware update of a device (Raspberry Pi 3)
Uploading blob to Azure:
- iothub_client_sample_upload_to_blob: Uploads a blob to Azure through IoT Hub
How to compile and run the samples
It is recommended to leverage the library packages when available to run the samples, but sometimes you will need to compile the SDK for/on your device in order to be able to run the samples.
This document describes in detail how to prepare your development environment as well as how to run the samples on Linux, Windows or other platforms.