Command line tools written in C for the MQTT-S (MQTT For Sensor Networks) protocol.

Supported Features

• QoS 0
• Keep alive pings
• Publishing retained messages
• Publishing empty messages
• Subscribing to named topic
• Clean / unclean sessions
• Manual and automatic client ID generation

Unsupported Features

• QoS -1, 1 and 2
• Last Will and Testament
• Displaying topic name with each recieved message (aka verbose mode)
• Packets longer than 255 bytes
• Automatic gateway discovery
• Pre-defined topic IDs and short topic names

Building

Just run 'make' on a POSIX system.

Publishing

Usage: mqtts-pub [opts] -t <topic> -m <message>

  -d             Enable debug messages.
  -h <host>      MQTT-S host to connect to. Defaults to '127.0.0.1'.
  -i <clientid>  ID to use for this client. Defaults to 'mqtts-tools-' appended with the process id.
  -m <message>   Message payload to send.
  -n             Send a null (zero length) message.
  -p <port>      Network port to connect to. Defaults to 1883.
  -r             Message should be retained.
  -t <topic>     MQTT topic name to publish to.

Subscribing

Usage: mqtts-sub [opts] -t <topic>

  -1             exit after receiving a single message.
  -c             disable 'clean session' (store subscription and pending messages when client disconnects).
  -d             Enable debug messages.
  -h <host>      MQTT-S host to connect to. Defaults to '127.0.0.1'.
  -i <clientid>  ID to use for this client. Defaults to 'mqtts-tools-' appended with the process id.
  -k <keepalive> keep alive in seconds for this client. Defaults to 0.
  -p <port>      Network port to connect to. Defaults to 1883.
  -t <topic>     MQTT topic name to subscribe to.