nganlh / MQTT-SN

MQTT-SN implementation in contiki for the course LINGI2146 - Mobile and Embedded Computing

MQTT-SN -- Group Q

MQTT-SN implementation in contiki for the course LINGI2146 - Mobile and Embedded Computing

Repository description

• /broker : contains the config file of mosquitto broker
• /gateway : contains all files relative to the gateway
  • gateway_v2.c : file containing the code of the sensor root node
  • gateway.py : file running the gateway
• /sensor_node : contains all files relative to the sensor nodes
  • sensor_v2.c : file containing the code of a sensor node
• /subscriber : contains all files relative to the subscribers of the MQTT network
  • subscriber.py : file running one subscriber
  • topics_subX.txt : file containing subscriber's topics

Requirements

• contiki and cooja
• the cooja plugin serial2pty.
• Mosquitto
• Python
• paho-mqtt

How to test

1. Inside a new simulation in cooja, add a first z1 mote with gateway_v2.c.
2. On this node perform a right click and choose serial2pty.
3. Add as many z1 motes as you want with sensor_v2.c.
4. Go to the /gateway directory and run inside a command prompt sudo python gateway.py -m <mote_nomber> where <mote_number> is the number of the serial device of serial2pty. You can get this number unside cooja in the small window of the related plugin : /dev/pts/<mote_number>.
5. Got to /broker and run mosquitto -c broker.conf. If mosquitto is already running, you need to kill its process.
6. Inside a new command prompt, in the /subscriber directory, enter python subscriber.py -f <topics_file> where <topics_file> is a .txt file located in the same directory. You can perform this action as many times as you want.
7. Finally run the simulation on cooja

Remark

The <topics_file> contains the different subscriptions of a subscriber. These subscriptions have the form : <node_id>/<topic> where <node_id>is the rime id of a node inside contiki and <topic> is temperature or humidity. An example is 2.0/temperature.