You can set a new passcode according to the following steps: 

1. Tap your Smart Lock R10 on the devices page in the eufy app.

2. Tap "Manage Access" at the bottom right corner of the screen.

3. Tap "Add Access" and follow the instruction to add passcodes for your family and friends.

Note: If you only want people to have access to your smart lock for a certain period of time, you can set the "Access Time" accordingly in the app.

If you have any questions, please contact us for further assistance.