Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
What have you tried so far?
Have you tried restarting your wireless router and any wireless access points?
If not, try it now and let me know if it works...
Even though you can connect to wireless on other devices, sometimes the router can get confused and block certain devices, so it is important to restart it and any access points first.
If the HC-300 still won't connect, let me know did you recently have any power outages or thunderstorms?