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