Automated Warehouse indicators

[roboneo]

Hi! Im making a proyect to help a worker in his Warehouse, the idea is to make a kind of parking lot light system, where a green Led turn on when theres is material on the location and red when the location has material.

I searched a bit and found That this could be done with pubnub and the HC-SR04, here's the link https://www.google.com.mx/amp/s/www.pub ... camovil-mx
But my problem is That the Warehouse has 15 locations, so, could it be possible to use more tan 1 sensor for every raspberry so i wouldnt need 15?
Thank you so much!

[BMS Doug]

Yes, you'll be able to connect them all to one pi if you want, although you would need an i/o expander and might have problems with the physical distance between the bays.

I'd suggest using a bunch of arduinos instead of the pi.

One arduino nano v3 could do 4 locations.