32 lines
1.1 KiB
Markdown
32 lines
1.1 KiB
Markdown
# Amazon Web Services IoT MQTT Subscribe/Publish Example
|
|
|
|
This is an adaptation of the [AWS IoT C SDK](https://github.com/aws/aws-iot-device-sdk-embedded-C) "subscribe_publish" example for ESP-IDF.
|
|
|
|
# Configuration
|
|
|
|
See the README.md in the parent directory for information about configuring the AWS IoT examples.
|
|
|
|
# Monitoring MQTT Data from the device
|
|
|
|
After flashing the example to your ESP32, it should connect to Amazon and start subscribing/publishing MQTT data.
|
|
|
|
The example code publishes MQTT data to the topic `test_topic/esp32`. Amazon provides a web interface to subscribe to MQTT topics for testing:
|
|
|
|
* On the AWS IoT console, click "MQTT Client" near the top-right.
|
|
* Click "Generate Client ID" to generate a random client ID.
|
|
* Click "Connect"
|
|
|
|
One connection succeeds, you can subscribe to the data published by the ESP32:
|
|
|
|
* Click "Subscribe to Topic"
|
|
* Enter "Subscription Topic" `test_topic/esp32`
|
|
* Click "Subscribe"
|
|
|
|
... you should see MQTT data published from the running example.
|
|
|
|
To publish data back to the device:
|
|
|
|
* Click "Publish to Topic"
|
|
* Enter "Publish Topic" `test_topic/esp32`
|
|
* Enter a message in the payload field
|
|
* Click Publish
|