Hi,
I’m already using a v3 to monitor my garage, is it possible to calibrate it with a QR code to send open/close notifications without the Controller?
I don’t need it to control the garage door, just detect if it’s open/close
Welcome to the Wyze User Community Forum @stavfx! 
Unfortunately no. The logic used to read the QR is within the GDC Accessory install so the GDC has to be installed in order to use the QR read feature.