Wifi does not work

[dulka]

I'm trying to configure the wifi on my PI3 that mounts Wheezy with a pre-installed application (Panorama of Weather Liri) without succeeding. I opened the configuration file "sudo nano /etc/wpa_supplicant/wpa_supplicant.conf" and I wrote all the data of the connection correctly, the problem is that the change is saved until the reboot after it is lost, I saved in different ways with ctrl X + Y + enter or with ctrl O + Y but nothing to do. Help me because I'm not very good

[pcmanbob]

First off raspbian wheezy is to old to support the built-in wi-fi on a pi 3.

If your changes are not present after saving and rebooting it may be that your SD card has failed and gone read only.

What happens if you just created a file called test.txt in the home/pi directory and then reboot ?
If the file is not present then almost certain you SD card has failed and is now read only

Only option is a new SD card.

[dulka]

Thanks for your help