Try using wpa_supplicant.
https://wiki.archlinux.org/index.php/WPA_supplicant# cat /etc/wpa_supplicant/EAP_TTLS_PAP.conf
$this->bbcode_second_pass_code('', 'network={
ssid=""
scan_ssid=0
proto=RSN
key_mgmt=WPA-EAP
pairwise=CCMP
group=CCMP
eap=PEAP
identity="username"
password="password"
phase1="peapvar=0"
phase2="auth=MSCHAPV2"
}')
# wpa_supplicant -i wlan0 -D wext -c /etc/wpa_supplicant/EAP_TTLS_PAP.conf &
Hope this helps, Good luck.