How The Node Works - Libelium Waspmote Plug & Sense! Smart Parking Technical Manual

How the node works

4. How the node works
Figure : Basic working loop diagram
As the diagram indicate, the basic loop of the node consists in read the sensor and send a frame when the parking slot change
it status. Then, it sleeps a desired time and starts the loop again.
Some events can forced the node to send a frame to the cloud. If a desired time elapsed since the last radio transmission, the
node will send a Keep-Alive frame. This frame only contains basic data from the node (parking slot status and battery status). It
is useful to know that there is no changes in the slot, but the node still working. The node also will send a frame each 24 hours
with the working data of the day (number of measurements, number of transmissions,...).
Figure : Extended loop diagram
-7- v7.0