Generate QR code for your WiFi login details
You can generate these codes using an online service, or using the QR generator of your choice and feeding it this text:
WIFI:S:My_SSID;T:WPA;P:key goes here;H:false;
^ ^ ^ ^ ^
| | | | +-- hidden SSID (true/false)
| | | +-- WPA key
| | +-- encryption type
| +-- ESSID
+-- code type
Escape any special characters (", ‘, ;, ,, or ) with a backslash.
source: https://superuser.com/a/1459233