Implement and showcase a network architecture similar to LoraWAN in TinyOS. The requirements of this project are:

1. Create a topology with 5 sensor nodes, 2 gateway nodes and one network server node, as illustrated in Figure.

2. Each sensor node periodically transmits (random) data, which is received by one or more gateways. Gateways just forward the received data to the network server.

3. Network server keeps track of the data received by gateways, taking care of removing duplicates. An ACK message is sent back to the forwarding gateway, which in turn transmits it to the nodes. If a node does not receive an ACK within a 1-second window, the message is re-transmitted.

4. The network server node should be connected to Node-RED, and periodically transmit data from sensor nodes to Thingspeak through MQTT.

5. Thingspeak must show at least three charts on a public channel.

   

Open in a terminal the folder of the project, then insert the command:

• make telosb
• node-red

Go to the URL http://localhost:1880, import the flow from the node-red folder's node-red-source file, and then deploy.

Open Cooja and arrange the eight Sky motes in a manner similar to the network simulation shown in Figure. Afterward, open a Serial Socket (SERVER) on port 60008 on localhost on the mote of Network Server. You can also use my saved simulation that is located in the cooja folder, but you will need to update all of the Contiki firmware with the right location of your main.exe file. Go to File > Open Simulation > Open and Reconfigure > Browse and select the file from the folder cooja > my_simulation.csc. Next, select SkyMoteType as the mote type and contiki firmware from the folder build > telosb > main.exe for each mote.

Open the Thingspeak channel page at https://thingspeak.com/channels/2111175.

Finally start the simulation on Cooja.