@PaPawGeek I agree. FYI, I am not defending the exclusion of WiFi by my client (I think it's irrational), but that's the environment in which I need to work. I'll have to add robust encryption and security at the app level. My main worry is that the Xbee unit will broadcast its SSID and look like a WiFi connection (thus running afoul of my requirements). I like the Xbee suggestion from @trapman16 as it's a clear path to implementation, just trying to lean on his experience.