1. Determine radio supported bands/channels

   $ iw phy
   

2. See what ESSIDs are available

   $ sudo iwlist wlan0 scan | grep "ESSID:" | sort | sort -n
   

3. Get information for SSID of interest (e.g., JHUISI_NSPUBLIC_OPEN)

   $ sudo iw dev wlan0 scan ssid <SSID>
   

Monitor mode allows a network device to intercept and read network packets, unmodified. In monitor mode, 802.11 management or control packets are available and 802.11 packet headers are NOT "translated" by network drivers.

Note: you will need to reboot the raspberry pi when you are finished so that it returns to normal managed mode for wlan0!

1. First, kill services problematic to monitor mode

   $ sudo airmon-ng check kill
   $ sudo systemctl stop NetworkManager
   

2. Switch radio to channel identified above

   $ sudo airmon-ng start wlan0 <CHANNEL>
   

3. Confirm radio settings

   $ iwconfig wlan0mon
   

Reboot the RPI to restore it back to normal, managed wifi mode.