connect android devices in ad-hoc mode without needing to net connection?

can we get android devices in ad-hoc mode using WIFI-card but without access internet ? i mean to connect peers to send and receive messages between them but without having internet connection ? i see this link talk about wpa_supplicant.conf to enable ad-hoc mode, but it seems that there are problems in this thing. and see this command iwconfig but this doesn't support on android !!