Replacing a standard door knob with a smart one is one of the easier home upgrades. Most people can do it in under an hour with just a screwdriver and a little patience. This guide walks through the general process so you know what to expect before you begin.
Before You Start
Check that the lock fits your door before opening the box. The EMBENLY BL01 is designed for standard doors 30 to 50 mm (about 1.2 to 2 inches) thick, with an adjustable latch, and it works on both left- and right-handed doors. Our guide on whether the EMBENLY smart lock fits your door covers the measurements in more detail.
This is a knob-style lock, so it is best suited to bedrooms, home offices, and other interior doors. On a main entry door, use it alongside a deadbolt rather than in place of one. Then gather the basics:
- A screwdriver
- Your new smart door knob and all the parts in the box
- One CR123A battery
- A small container for the old screws and hardware
Step-by-Step Installation
- Remove the old knob. Unscrew the visible screws on the interior side, then pull the knob and the latch free from the door.
- Check the latch and strike plate. Make sure the latch faces the right direction and the door closes cleanly against the strike plate. The latch on the BL01 is adjustable, so set it to match your door before you install it.
- Install the new latch. Slide it into the edge of the door and secure it with its screws.
- Mount the exterior side. Place the outside half of the lock through the door so the spindle lines up with the latch.
- Attach the interior side. Fit the inside half in place and tighten the screws evenly. Do not overtighten, because the knob should still turn smoothly.
- Insert the battery. Install a CR123A battery as shown in the manual. The lock will beep to warn you when the battery runs low.
- Set up the lock. Follow the manual to pair the lock with the app and enroll your fingerprints.
Test Before You Close the Door
This step is the one people skip, and it prevents most surprises. With the door open, check these:
- The knob turns smoothly and the latch retracts fully.
- The latch extends fully when you let go.
- Each enrolled fingerprint unlocks the door.
- The mechanical backup key works.
- If the lock pauses after several failed fingerprint attempts, wait a couple of minutes before trying again.
Then close the door and repeat the test from outside to confirm the latch lines up with the strike plate.
Common Installation Problems
- The knob feels stiff: Loosen the screws slightly and check that the parts are aligned.
- The latch doesn't reach the strike plate: Check the latch direction and adjust the strike plate position if needed.
- The lock does not respond: Confirm the battery is seated correctly.
- The door is outside the supported thickness: Measure again. If it is under 30 mm or over 50 mm, this lock will not fit properly.
Safety Tips
- Keep your backup key with you, not inside the house, while you test.
- Do not close the door until the lock has been tested open.
- Keep the manual somewhere easy to find for later reference.
Final Thoughts
A smart door knob installation is mostly about taking things in order: remove the old knob, fit the latch, mount both sides, add the battery, and test. Take your time with the testing step and your new lock should work reliably from day one. For the EMBENLY Secure Smart Door Knob, always follow the instructions that come in the box for the exact details.
