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# MQTT in curl
## Usage
A plain "GET" subscribes to the topic and prints all published messages.
Doing a "POST" publishes the post data to the topic and exits.
Example subscribe:
curl mqtt://host/home/bedroom/temp
Example publish:
curl -d 75 mqtt://host/home/bedroom/dimmer
## What does curl deliver as a response to a subscribe
It outputs two bytes topic length (MSB | LSB), the topic followed by the
payload.
## Caveats
Remaining limitations:
- No username support
- Only QoS level 0 is implemented for publish
- No way to set retain flag for publish
- No username/password support
- No TLS (mqtts) support
- Naive EAGAIN handling won't handle split messages
## Work
1. Write a mqtt server for the test suite
2. Create a few tests verifying the existing mqtt functionality
3. Work on fixing some of the worst limitations - with accompanying tests
4. Consider replacing the client-side MQTT code with wolfMQTT
## Credits
The initial MQTT patch was authored by Björn Stenberg. This work is built upon
that patch and has been expanded since.
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