Assignment for implementing a simple IoT architecture with Node-RED and Ubidots

1. Modify the flow assignment.json to implement a Node-RED server that behaves as follows:
   • It acquires Rpi3 sense hat data from the broker test.mosquitto.org:1883, with topic unige/dibris/room328/sensehat;
   • It computes the absolute value of the difference between the last two temperature measurements;
   • It sends to the same broker with topic unige/dibris/room328/display the Rpi3 command to set all display pixels to color red, if such a value is greater than 1, to green, otherwise.

   Hint: use a join node.
   

2. Implement the same functionality by exploiting Ubidots derived variables and events with web-hooks.