R7000 WIFI devices fail to connect - obtaining IP address

Hi All,

I have had this router for about a year. Everything has been working fine until about 2 weeks ago. Up until this point I was runing a firmware 1.0.7.* (unsure of the exact version). I also only had the 2.4G enabled. Otherwise a pretty stock configuration. I have about 4 -5 WIFI devices, mixture of Andriod Phones and Tablets.

For the last couple of weeks all devices connecting via WIFI are failing to connect properly. The are reporting the following - "Obtaining IP address" or "failed to obtain IP address". Wired devices are working fine.

These are the step I've taken so far:

1. Reboot router - 1 or 2 devices connect but as soon as they go out of wifi range they fail to reconnect. Other devices fail to connect.

2. Check for interferrance. My wifi is the only one nearby and wifi analyser is showing good strength

3. Disable 20/40Mhz coexistance - no affect

4. updated firmware to latest version(V1.0.9.18_1.2.27) - no affect

5. Factory reset - no affect

4. Enabled 5Ghz with same SSID and security - this looked to be more stable as after reboot all devices connected but I'm still getting issues with device intermitantly not connecting. I noted that all devices are still connecting to the 2.4G (nothing connecting to the 5G)

Cheers

Jon