How many AP of Electronic shelf labels we need for the grocery store?

How many AP of Electronic shelf labels we need for the grocery store? What is the covered area by each AP? should it be connected to the internet always? or only local network?

The number of electronic shelf labels AP used is related to the area of the store. In actual use, consider the field environment and other factors such as the communication range of the AP. A circle with a radius of 12 meters Both are ok, if you install local version system, you need to choose local network.