Wireless paging system using Arduino. Transmitter / Receiver selection help.

I'm working on creating a Wireless Paging system for a project and I'm having trouble deciding on the transmitter and receiver to use for the project. The system will be used in a shop by person A to request assistance from person B in an office roughly 300-500ft away with a cement barrier and a steel door separating the 2. I just want to do a simple button and display device that basically asks Person B for assistance and notifies Person A that help is on the way on the display. The system must be able to work without interference from the other wireless systems already in use. I appreciate any advice anybody can offer, Thanks!

GinaJ3 years ago

Whether you need a paging system for table service or fast casual environments, PagerTec® Restaurant Pagers provide the tools to help your restaurant paging experience be successful.
http://www.pagertec.com/