I use a queen beecon widget widget set for hard sleep mode to turn off internet at night, (i think its off all night as it is still off in the morning) you could try using the comands that uses, im not sure which one u need, im totaly new to linux but here is the command in full,
run-standalone.sh dbus-send --system --dest=com.nokia.icd /com/nokia/icd_ui com.nokia.icd_ui.disconnect boolean:true ; rmmod wl12xx ; run-standalone.sh dbus-send --system --type=method_call --dest=com.nokia.phone.net /com/nokia/phone/net Phone.Net.set_selected_radio_access_technology byte:1 ; run-standalone.sh dbus-send --print-reply --system --dest=com.nokia.mce /com/nokia/mce/request com.nokia.mce.request.req_tklock_mode_change string:locked