The question that I do not understand is that I installed before another different image Open ..., which includes the MT7601 driver and it worked perfectly, without problem. So I'll have to go back to her. Thanks for your help.
I have tried to activate the driver by opkg. The console identifies the firm and the kernel-module, but "Couldn't find". And in the box there is no WLAN connection activation option. I do not understand. Please see the photo. Thank you.