# How to Install: Smart Lock, 2nd Gen > This article provides instructions to install the Smart Lock on the universal mounting plate. If your Smart Lock has three numbered mounting plates, downloa... Source: https://support.august.com/en_us/august-smart-lock-homekit-edition-installation-guide-Sywl1wLk0_f Last updated: 2023-11-16T22:51:16.440Z This article provides instructions to install the Smart Lock on the universal mounting plate. If your Smart Lock has three numbered mounting plates, [download this PDF for installation steps](http://in-app-installation-guides.s3-website-us-west-2.amazonaws.com/prod/installation/pdf/August_SmartLock_HomeKit_Edition_Installation_Guide.pdf). #### Confirm Lock Compatibility Make sure your existing deadbolt is compatible with the August Smart Lock. Only standard single-cylinder deadbolts are supported. Use our compatibility assistant to double-check:[august.com/compatibility](http://www.august.com/compatibility). [](#top-menu) [Lock Installation](#) [In-App Set Up](#) ## Lock Installation #### What's In the Box ![included with the lock](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/bb877db235e8d8424a61e5762bce6b64.jpeg) #### What You'll Need ![phillips screwdriver](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/cf92d46e100036180171f5536e6a1483.jpeg) #### Step 1. Prepare your existing deadbolt. Affix the supplied adhesive strip over the key hole, securing it to the exterior side of your door. This should hold the key hole in place when you remove the thumb-latch on the inside of the door. On some doors, such as those with glossy paint, the included tape may not be strong enough. In this case you should apply additional stronger tape to ensure that the key hole stays in place. Use caution. Some types of tape, such as duct tape, may damage the paint on certain types of doors. ![tapped interior deadbolt](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/b55e47894cd94a4fa160423f438f0909.jpeg) #### Step 2. Remove your existing thumb-latch. Position your thumb-latch so that you can unscrew the existing screws on your deadbolt. Remove the screws entirely from the deadbolt and keep them to assist in the next step. After removing the screws,be sure to unlock your deadbolt before removing the thumb-latch. ![removed the thumbturn](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/5f0ee49763361a4b31cf906731cf7ed1.jpeg)![](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/defb331b2eff21b948c6c98059378319.jpeg) Position your thumb-latch so that you can unscrew the existing screws on your deadbolt. Remove the screws entirely from the deadbolt and keep them to assist in the next step. After removing the screws,be sure to unlock your deadbolt before removing the thumb-latch. Your thumb-latch may include an additional back plate underneath it. If so, remove the back plate, and use the back plate and the longer screws for the next step. #### Step 3. Position and attach the mounting plate. The included mounting plate has two adjustable screw-holes that can be repositioned as needed. Remove the screws from the thumb-latch and insert them into the front of the mounting plate (the back of the mounting plate is flat and includes 4 pre-attached rubber bumpers). Use the screws to install the mounting plate over the existing deadbolt tailpiece. Moderately tighten the screws by hand until the mounting plate is settled against the door.  **PLEASE NOTE: Over-tightening the screws may lead to issues over time.** Additional guidance is available [here](https://support.august.com/mechanical-issues-SyZXOIFeS). ![](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/39dc32856e13d4f4bc6c48e0c944cbec.jpeg)![](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/99c7b051dd47bcc11e89741b0af3d446.jpeg) #### Step 4. Select and attach the correct adapter. Select your adapter from the Compatibility Chart: ![adapter compatibility chart](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/cf7d19ea88123b5d27de4e76be64ad56.png) Place the correct adapter onto the tail piece. Tighten the screws until they are moderately tight.Do not over-tighten - over-tightening can deform the mounting plate and interfere with the operation of the lock. ![](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/19b25469de77843ff6d520cd01b19eba.jpeg) #### Step 5. Attach the August Smart Lock. Pull out both side wing latches. Slide the August Smart Lock over the tail piece and attach it to the mounting plate. Make sure the back of the lock is flush with the door. ![placing lock on mounting plate](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/339c55ed41575ac687af4a27c4f6d5a8.jpeg)![](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/0be981b9dd58d63cf87f9fa20a4478bc.jpeg) To secure the August Smart Lock, clamp down both side wing latches to the mounting plate completely. If the latches are difficult to clamp down, go back to the last paragraph of step 4 and ensure that the screws have not been over-tightened. If the wing latches won't clamp down properly, you may need to adjust the tightness of the screws. ![](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/42af9f662d9fdc1e225f89862fae6c6c.jpeg) #### Step 6. Remove the battery tab. Press down on the August logo located at the bottom of the face plate. The top of the face plate will tilt outward. Grab the face plate and remove it. While holding the batteries in place, remove the plastic battery isolation tab. Make sure that the battery is properly seated in its compartment. ![removing battery plate](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/5f5d4f99c128453b1825d19061f00e45.jpeg)![](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/17bb30050319e450b9452550cb15fed4.jpeg) Place the face plate back onto the August Smart Lock. Make sure the August logo is located along the bottom of the face plate. The face plate attaches with magnets straight onto the August Smart Lock. ![removing and inserting battery](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/b60ce3101d03e52d6344ae7116748ce8.jpeg) This completes the installation steps for your Smart Lock. Next, visit the [In-App Set Up](#top-menu) tab to configure in the August App. ## How to Set Up in the App Download and install the August Home app. Select "Get Started" from the home screen, or, if already logged in to the app, select "Set Up a Lock" from the main menu. [![link to app store](https://drive.google.com/uc?id=15l7Vumvo4b4LsJ5iiJIxSmysYNfjB_fR)](https://itunes.apple.com/us/app/august-smart-lock/id648730592) [![link to google play](https://drive.google.com/uc?id=15_n_XFX1P7Oc8JyyQw_lCZDbR18Alsrf)](https://play.google.com/store/apps/details?id=com.august.luna&hl=en) Follow in-app instructions to complete set up. Next, follow installation steps for DoorSense™. Select the DoorSense™ Installation tab from the menu. ##### ##### Documents: * [PDF Install Guide](http://in-app-installation-guides.s3-website-us-west-2.amazonaws.com/prod/installation/pdf/installation-guide-asl-pro.pdf) * [PDF Install Guide, 3 mounting plates](http://in-app-installation-guides.s3-website-us-west-2.amazonaws.com/prod/installation/pdf/August_SmartLock_HomeKit_Edition_Installation_Guide.pdf) ## Related Articles ##### Smart Lock FAQ This article provides answers to some commonly asked questions about the August Smart Lock. The information below is relevant to every generation August Smart Lock...  [View more](https://support.august.com/smart-lock-faq-r1QPMCZS)   ##### August App FAQ This article provides answers to some commonly asked questions about the August App.Where do I download the August App?With the August Home App, you are always...  [View more](https://support.august.com/august-app-faq-ByfHHIYlB)   ##### August Connect FAQ This article provides answers to some commonly asked questions about the August Connect. Find detailed information, such as setup, installation, and troubleshoo...  [View more](https://support.august.com/august-connect-faq-BylGvUyA_G)