Overview

Nexus 7 2012 (ASUS, Grouper/Tilapia) might not be able to connect to wifi due to IGTK / Protected Management Frames. Thanks to the author of https://xdaforums.com/t/guide-rooting-nexus-7-2012-lollipop-5-simple-steps.3968405/

Errors / Symptom

Using adb logcat you'll find the following error each time you attempt to connect.

 ...: WPA: Failed to configure IGTK to the driver
 ...: RSN: Failed to configure IGTK

The connection will not be established, but there will be no error or warning.

According to several blogs online, the problem seems to be related to PMF or “Protected Management Frames”. Sources:

Checking the WPA Supplicant settings on the device, pmf is enabled (1)

The procedure will require unlocking the bootloader.

Download Android SDK platform tools, we'll need adb and fastboot.
- On Windows, you might require ADB Drivers
Download TWRP img, depending on the device you own: Wi-Fi grouper / 3G tilapia
Boot into the bootloader by holding Power + Vol Down for about 10 secs
Connect your device using a usb cable to your computer
Execute this step only if it shows LOCK STATE - LOCKED. WARNING: the device will be factory reset! Run fastboot oem unlock
Run fastboot boot path/to/twrp-recover.img to run TWRP without installing it
Go in Mount and enable System
Go in Advanced then Terminal. Then use busybox vi <FILE> to patch:
- /data/misc/wifi/wpa_supplicant.conf setting pmf=0
- /system/etc/wifi/wpa_supplicant.conf setting pmf=0
- /system/build.prop setting ro.setupwizard.wifi_required=false (avoids mandatory wifi connection on initial setup)

Magisk for root access (latest version compatible with Android < 6): 25.2. Use adb push /path/to/Magisk-v25.2.apk /sdcard/magisk.zip then adb shell twrp install /sdcard/magisk.zip to install when using TWRP
F-Droid (latest version compatible with Android < 6): org.fdroid.fdroid_1015056.apk