Realtek RTL8188CUS Monitor Mode for Raspbian Instructions

This will allow you to use your Realtek RTL8188CUS (common wireless chip found in Edimax EDW-7811Un) in monitor mode without recompiling the kernel in Raspbian.

Install

1. Check the directory with the RTL8192CU drivers in them by typing sudo ls /lib/modules/$(uname -r)/kernel/drivers/net/wireless/realtek.

• If it returns with an error or cannot find the driver (and it shouldn't), you will need to install the drivers that I have put on GitHub and follow the guide at this link. https://github.com/TheN00bBuilder/rtl8192drivers

2. Type sudo modprobe rtl8192cu to turn on the correct drivers, in case it is using the wrong ones.

3. Type the command ifconfig to list your wireless adaptors.

• Note which wlan the Realtek adaptor is on.

4. Type sudo iw $WLAN interface add mon0 type monitor (where `$WLAN is the interface from the previous step) to add a monitor mode function to the adaptor.

• Don't type the pahrenthesis.

5. Try to start the monitor mode through airmon-ng with the command sudo airmon-ng start (wlan of Realtek adaptor).

• If it fails with Error setting channel: command failed: Device or resource busy (-16), then run sudo airmon-ng check kill and try again.

That's it! Your RTL8188CUS should now work in monitor mode.