Validate the numbers to be scanned by barcode such as from 1-100

[ammaar_al_nofaish]

I would like to set some numbers to be scanned and no other code should be accepted at all, how can I do this?

[Kal_Lam]

@ammaar_al_nofaish, this post discussed previously should help you solve your issue:

Adding multiple constraints to barcode scan (Use the camera to scan the barcode)

Hi @MaxH, Maybe you could use the following constraint with the barcode question type as shown in the image below: In the survey tab of your xlsform: [image] Reference xlsform: Barcode 2020 09 10.xlsx (10.0 KB) My assumption is that maybe you have a barcode allocated for each location. In this case set the constraint for each of those locations as shown in the image above. So in your case you should have 40 barcode acceptable. If a user tries to enter the wrong barcode the system (KoBoColl…