Cannot connect to the internet with my w-fi, I have put in the appropriate passwords etc to no avail, it keeps scanning for IP address. kaleidoscope639

just hit the reset button on the router, then connect your computer to the router with either the app for your router or with a cable on wire 1 and on laptop enter the ip address for your specific router to bring up settings and change the password.

When you connect to Wifi and if it shows "obtaining IP address" means it is searching for the IP address of the wifi sender...
when you connect to internet it is done through IP address so your phone is tying to locate an IP address with which it can connect
to the internet. Below are the steps to connect your device to Wifi:
Applications-->settings-->turn Wifi ON-->select the wifi that you want to connect from the list displayed-->enter the network password(if it asks for) -->connected Another easy way...just open the chrome app in your phone and try typing in some website like google.com when it tries to connect a pop up will appear "try connecting to WiFi ..mobile data will incur charges.." something of that sort...and you can click connect to wifi...and automatically it will detect the wifi that is around your location. You can check for your IP address through Ip-details.com

The free Wi Fi router may have run out of IP leases on its DHCP server just when you were trying to connect the tablet. If the leases are as an example say one week long then if lots of people connect to the free wi fi they get a lease for one week. So if the device comes back within the week it already has an IP address assigned to it and works. If a new device comes along it has to ask the DHCP server via the WI FI to assign it an IP address. If all available IP addresses are leased from the WI FI router the device will not get assigned an ip address. Would suggest trying to connect the Tablet on another Wi FI system to test it works.
I had this happen on my mobile phone when I was in Surfers Paradise in a Coffee shop and suspected the lease time on the WI FI router was too long for the amount of short term customers using the coffee shop. (the staff had no idea on why the Wi FI was not working so it would have been pointless to try and explain this concept to them and how to change the lease time on the dhcp server) Also there is a limit to the simultaneous number of users on a Wi Fi frequency on one access point . Unless the WI FI uses multiple WI FI access points.

Does the WiFI have a MAC filter set up? If so then add your tablet's MAC to it.

To start you need to check you are entering the right password! The password is the one for the WiFi! Is it written on a card or on the router, it will be case sensitive!

Assuming you're trying to connect via wireless router. If you connect, but then aren't able to get to the Internet. I would something is wrong between the router to the modem to the wall (DSL/Cable modem) rather then your tablet device. You can connect your device to your router and you device will show it has a wifi connection, but beyond the router something may be amiss. Try seeing what you get from another device like computer or laptop. That might get you closer to your actual issue,

I assume you are either unable to see your network listed or when you select your network from the list of active Wi-Fi Networks within range of you device and depending on security level no password or the Security Key you have doesn't work. First, make sure you have a few pieces of information: 1) The SSID or name of the network 2) The security type and password 3) If no DHCP service you'll need the ip address subnet and an available address for your device, ip address of the gateway/router, & ip address of the DNS servers. Usually the router provides DHCP and provides all of the addressing information.

Typically, you are provided the SSID and a security key or password. On your tablet open settings and turn Wi-Fi in necessary and look for your SSID in the list to the right. If your SSID is not shown verify the name, that the router is on and you are within range. Be aware of obstructions between you and the router. My Pool House is a virtual dead zone due to some electrical wiring on the wall it shares with the office. The router is less than 5 feet away, but the signal is unreliable. If everything is working and still no SSID on list, then it may be hidden. Simply, select Add Wi-Fi Network at the bottom and enter the SSID (Netgear987), security type (WPA OR WPA2 typically) and the password (PASSWORD maybe case sensitive). If it connects and fails to obtainan ip address or just drops it may indicate another layer of security that requires each device MAC ID is added to the list of authorized devices for that router. Your MAC ID is listed on the Settings_About Device_Status screen WiFi MAC Address: (F7:C7:AE:78:E6:FC). Sounds like a lot but usually verified SSID and password do the trick. Good Luck

You don't assign an IP address to your iPad, it has one assigned to it by your router.

Open the Settings app on your iPad. Make sure Airplane Mode is OFF. Tap Wi-Fi. Make sure the Wi-Fi switch is ON, Ask to Join Networks is ON. Your in-home wi-fi network should be visible in the list titled Choose a Network.... Tap its name and provide the network password required by your router.

If you don't see your local router listed, it may not be properly configured.

This is the result of a bug in Android 4.1, you'll have to manually assign an IP address to your Android device.
Instructions on how to do this are available here:
http://www.trickswindows.com/2011/12/fix-obtaining-ip-address-android-wifi.html