Qrcode Scans - BIM

[ManChrys]

Hello,

im newbie in this section and i have some questions.
i would like to ask if i want to use the qrcodes for georeference a BIM model inside a floor how should i setup my qrcodes? What i mean. In this situation i have one model and not 4-5 different models, like the example, and everytime i scan a qrcode the model will change rotation . Even if i scan 1 QRcode the georeference is not correct. I measure all distances with tape and disto and after that i put qrcode on the wall. Any thoughts about that ?

I saw an example here https://www.youtube.com/watch?v=wYb0hf68n6o . Should i scan qrcode A and then qrcode B but how can i make that ? Generally how can i have the best accuracy on georeference ?

Thanks in advance.