I have looked over the documentation. Actually the public read is at
yvesh.gitbooks.io/matukio-events-for-joo...in_participants.html
Thanks. However, I still am not clear as to the exact method to connect my phone to check in the user. I understand they are on the same network, the phone needs to be logged into the site as admin, the component needs to be open (?) on the phone. So how does the bar code or QR code know to check in the specific user by scanning the code. The code is a reference url, right? By scanning the code the phone browser opens. By scanning the code, which is in fact a link to a specific link in Matukio. Matukio knows when an admin user opens this link it means the user is checking in. Something like that, right?