No Wifi detection on my iPhone?

Can anyone tell me why my iPhone doesn’t detect my home Wifi anymore? I use Airport Express and extreme. It stopped detecting about a month ago after an Airport update. It’s very strange. It can detect other Wifi’s when away from home(the bars show up) but it doesn’t seem to work as far as allowing me to download large information. In the meantime, I can’t use my iPhone anymore as a remote, as VNC, to upload files, all the things I used to do with my phone I can’t anymore.
Does this sound familiar to anyone here?