New MirMR25 Kit

New kit out of box. Plugged in two of the transmitters and the receiver. Only getting ready light on transmitter and Ready switching to Busy shortly then back to ready on the Receiver. No communication between…I was told these were setup for plug and play out of the box. What else should I do to establish communication?

Yes, it is ready to work out of the box. Please power-up with a minimum of 10ft distance between ALL controllers (do not place boards on top of anti-static bags). Please wait about 1 minute for it to build a connection to all remote devices (usually shorter than 1 minute). Connect a switch between inputs to trigger remote relays.
Hope this helps.