If you were to request the endpoint at <https://daycare.mehtank.com/check> you would get:

Possible values:

• -1: not all readers and tags are aligned (i.e. door should stay locked)
  force closed for 1 minute
  
  
• a positive number: number of seconds since correct alignment was last validated across all tags (i.e. door should switch to open)
  force open for 1 minute