When we changed routers with 3bb to upgrade my security cameras lost their connection.  How can a reset them without having to climb on the roof to obtain the QR code and password.  

I don't think there's any way around it.

Same thing happened to me.....

How about a camera/phone on a long bamboo pole.

In future allways buy cameras that dont need QR codes to set them up

or if not possible

(it's getting less possible )then keep copies of the QR and passwords in a safe place.

Have you got a drone?

10 minutes ago, 2baht said:

Have you got a drone?

 

Or a neighbor kid who needs a few spending baht?

 

Change the wifi name and password of the new router to match the wifi name and password of the old router.