Q: My Ipad mini is not connecting with my home wifi.  Other devices are able to connect with the wifi.  I've repeatedly entered the wifi passcode, but it doesn't accep it.  Was working fine.  I've turned the ipad mini off and on and nothing.  Help!

What event occurred with your iPad since earlier today when it worked? update App or iOS? anything at all

If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network - Apple Support

Force Restart the device, then reboot the network:

Force Restart (won't affect settings/data/music/apps/etc)

1. Press and hold the Sleep/Wake button

2. Press and hold the Home button

3. Keep holding both buttons until the display turns off, then back on displaying the Apple logo.

If no luck, reboot your network:

1. Unplug both modem and router (if combined into one unit, unplug the single unit)

2. Plug in/boot the modem first, allowing one minute or so to stabilize

3. Plug in/boot the router second, allowing one minute or so to stabilize

4. Try to access your network again with the device

If no luck, try forgetting the network under Settings/Wi-Fi, tap the blue-circled "i", then tap "Forget This Network". Now reconnect to your Wi-Fi network with the proper Wi-Fi password.

SergZak has given great advice!!