ZKTeco's ZkAccess3.5 software requires one license, free of charge for up to 25 doors. To download this free license, we will do what follows:
- Go to "System" -> "License" -> "Get key Freely"
- Click on "Download Public License"
- We download the "ZKAcces3.5 Public License" and it will ask us to register on the ZKTeco page
- Once the login is done, it will allow us to download a .txt file with a serial number, which we will later have to put in "Use Public Key"