I wonder if most people don't realize that almost every AP these days carry the 2.4 and the 5, then say it connected to the 5, when in reality its the 2.4 its connected to.
And this is quoted from the Hydros web page:
"WARNING: The Control is NOT compatible with 5GHz WiFi. If your WiFi network is not listed, most likely, your router is broadcasting a 5GHz signal ONLY. Please get in touch with your Internet Service Provider or Router manufacturer to assist you in enabling the 2.4GHz WiFi network."