For the implementation of the project we chose to use BLE for communication due to ultra low power and the backbone already established by iBeacons.

The LightBlue bean despite being expensive was chosen for the prototype due to it's insanely small size and inbuilt cr2032 battery.
The code was compatible with Arduino, So it would be easier to develop our application.
The sensors we chose to work on our first revision is the HTU21 humidity sensor and a MICS5524 sensor.
The data would be read by a Raspberry Pi3 which would be a gateway device to upload the data to a cloud service like Thingspeak or Node-Red.
For the first prototype we want to implement our idea and record the sensor data and find out the issues to iterate our design.

A sketch of our implementation is attached below.