| ▲ | ac29 2 hours ago | |
From the upstream project: > Can I change the display of all ESLs in a store at once ? No. For two reasons: Unlike radio waves, optical communication must be line-of-sight. Even from wall and ceiling reflections, an unique transmitter has no chance of reaching all of the hundreds or thousands of ESLs in a store. Each ESL has an unique address which must be specified in update commands. There's no known way to broadcast display updates. | ||