To create a new passcode on your Smart Lock C30, please follow the steps below:

1. Launch the app on your smartphone.
2. Go to your Smart Lock C30’s main screen and connect to your lock.
3. Tap "Manage Access" at the bottom right corner of the screen.
4. Tap "Add Access" and follow the instructions to add new passcodes for your family and friends.

If you have any further questions regarding the Smart Lock C30, please don't hesitate to contact us for assistance.