# How to Install: Smart Lock Pro, 3rd Gen Technology > These steps will help with installation of the August Smart Lock Pro . For instructions specific to the 3rd Generation Smart Lock, visit this guide . ... Source: https://support.august.com/en_us/install-smart-lock-pro-3rd-gen-technology-Hy7eDIy0Of Last updated: 2021-11-12T23:24:29.155Z [](#top-menu) These steps will help with installation of the [August Smart Lock Pro](https://august.com/products/august-smart-lock-pro-connect). For instructions specific to the 3rd Generation Smart Lock, visit [this guide](https://support.august.com/install-smart-lock-3rd-gen-technology-rJOxw8yAuz). Instructions for installing your August Smart Lock, in-app setup, and DoorSense™ installation can be found below: [Lock Installation](#) [In-App Set Up](#) [DoorSense™ Installation](#) ## How to Install the Lock #### What's in the box ![included with smart lock pro](https://drive.google.com/uc?id=1U0L5PJa3UU48AmPEAf3B6xvqgzwA-ICC) #### What you'll need ![phillips screwdriver](https://drive.google.com/uc?id=1UR3aL5s6BNtK5fuofVOYbRqu7KV-1vmM) #### Step 1. Prepare your existing deadbolt Use the supplied adhesive strip to hold the keyed side of the lock in place. ![tapped deadbolt](https://drive.google.com/uc?id=1U7aACpwqFnh1xeUdY4B3Npe2j-wEnUTc) #### Step 2. Remove your existing thumb-latch Unscrew and remove the screws from your existing deadbolt thumbturn. If there is an additional back plate, remove that as well. Be sure to position the thumbturn so that you can access both screws so that you can entirely remove the thumbturn. ![unscrewing thumbturn interior side](https://drive.google.com/uc?id=1VD1RHbVkzUcIu6y92TGqSOzEEbNaMwqg) ![removing thumbturn from interior side](https://drive.google.com/uc?id=1V6iRVZM-RilvlEx1Arkvr2XEG4X95Iwj) #### Step 3. Prepare 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. ![putting screws in mounting plate](https://drive.google.com/uc?id=1VH2eJSNrI4hwMBIMba3dY9cpDWV0LID_) ![attaching mounting plate](https://drive.google.com/uc?id=1VHxQorcgmA2Oc5CxaXkGZfpPr5OJdYai) #### Step 4. Attach the Mounting Plate Tighten the screws by hand until the mounting plate is settled securely 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). ![installed mounting plate](https://drive.google.com/uc?id=1Vn1iSIaozz-yFJM-D73Rck0XIJloVPvq) #### Step 5. Choose your adapter ![adapter chart](https://cdn.prod2.kustomerhostedcontent.com/media/5f6cab56313fd9001af97923/06373cd81e6b76ccec401cb4e78380e8.png) Select your adapter depending on the tailpiece shape and orientation of your existing deadbolt. The correct adapter will slide onto the tailpiece with minimal effort. NOTE: The adapters can be placed in the mounting plate backwards. So if the shape is correct, but it seems backwards, try flipping the adapter around. #### Step 6. Attach the Correct Adapter Place the correct adapter onto the tail piece and ensure that the small nub is oriented at the top. ![placing adapter](https://drive.google.com/uc?id=1VQxVhHl-YaI23EEHhntOHS1eI20B8N0L) #### Step 7. Open the wing latches Pull out both side wing latches to prepare for mounting. ![smart lock with open wing latches](https://drive.google.com/uc?id=1VFLbdcZ0szuDXReuZcSt_-P-pztEgNZg) #### Step 8. Attach the August Smart Lock Pro Slide the August Smart Lock Pro over the tailpiece and attach it to the mounting plate. Make sure the back of the lock is flush with the door. To secure the August Smart Lock Pro, clamp down both side wing latches to the mounting plate completely. ![placing smart lock on door](https://drive.google.com/uc?id=1VmE8qwpZduuJqZWbHUqQmLBw9juzwWrs) ![mounting smart lock on door](https://drive.google.com/uc?id=1Vkwi4QnHE_5l0giqEskc9W_AIdeBrDfI) #### Step 9. Remove the faceplate Press down on the August logo located at the bottom of the face plate. Grab the top of the faceplate and remove it. ![pressing to remove battery cover](https://drive.google.com/uc?id=1Vb4Yli4jucCz2nGupDXmWMb0Pbd-IdEv) #### Step 10. Remove the battery tab 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 tabs](https://drive.google.com/uc?id=1TpfSGlYjjrS6HdY8HaoOjUsyrAtASm3w) #### Step 11. Replace the faceplate Place the faceplate back onto the August Smart Lock Pro, with the August logo at the bottom ![replacing battery cover](https://drive.google.com/uc?id=1VBHp8nQAPUpJZehqj8U6uuB0m2lGjpIy) Next, follow instructions to set up the device in the [August App](#top-menu). Select In-App Set Up from the menu. ## 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. [![app store link](https://drive.google.com/uc?id=15l7Vumvo4b4LsJ5iiJIxSmysYNfjB_fR)](https://itunes.apple.com/us/app/august-smart-lock/id648730592) [![google play link](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 DoorSense™ Installation from the menu. ## How to Install DoorSense™ This guide will walk you through the steps of installing DoorSense™ for the 3rd Generation Smart Lock Pro, which is the lock pictured below. If you need directions installing DoorSense™ Installation tab in [this guide](https://support.august.com/install-smart-lock-3rd-gen-technology-rJOxw8yAuz) provides instructions. August provides two options for installing DoorSense™: [Surface Mount](#surface-mount) and [Flush Mount](#flush-mount). The surface mount installation requires the use of a screwdriver only. The flush mount installation will provide a cleaner and less visible look with more robust performance, but does require drilling a  ⅝” hole into your door frame. ![surface mount and flush mount doorsense](https://drive.google.com/uc?id=1LtVwB1zAdFR0Op_7yc9wmmbX3seNXVk6)[](#surface-mount) ## Surface Mount Installation The DoorSense™ will come partially assembled for the surface mount installation with the magnet enclosure inside the housing and you will only need a screwdriver for this installation. #### What’s in the box ![included with doorsense](https://drive.google.com/uc?id=1MxAgIsLFmLFy3qqpUod9DuSWBhz20clg) #### What you’ll need to provide ![phillips screwdriver](https://drive.google.com/uc?id=1Lv6co5CotJeqOgl-ZN2LYHwEo1YPHE6P) #### Step 1. Determine mounting location For optimal performance, DoorSense™ should be mounted within 1.5 inches from the edge of your door frame, and within 1.5 inches from the top of the extended deadbolt. ![determining mounting location](https://drive.google.com/uc?id=1N2ZPF7oHIJTW8sSYX3a-HBFVOwRkaJo1) PLEASE NOTE: If you do not have a flat door frame or you have a perpendicular wall directly next to your door, the Door Sense can be alternatively installed on the perpendicular wall. The deadbolt should still be used as a guide for the recommended height of the DoorSense™ installation. #### Step 2. Attach mounting tape Remove one side of the adhesive backing. Attach to the back of your DoorSense™, making sure to align the edges and screw holes. Remove the other side of the adhesive backing. ![attaching mounting tape](https://drive.google.com/uc?id=1Lwnyo8bkg6UzdhP9ZLxFbZ72RE0hq3DT) #### Step 3. Place on door frame Press the adhesive side of the DoorSense™ on your frame in the proper identified mounting position. Make sure to align the pill shape vertically. ![placing doorsense](https://drive.google.com/uc?id=1LoeXgykoTTr5c_U7Fsl9F2gswSPfuNym) #### Step 4. Screw into frame Hand tighten your DoorSense™ to the frame using the included screws. PLEASE NOTE: You may wish to complete this step until after your lock is set up and calibrated to ensure that you are able to retrieve accurate door state readings before modifying your door frame. ![screwing in doorsense](https://drive.google.com/uc?id=1MA0I-1f5IDDsirTeJad6npuUufTyn4d7) #### Step 5. Attach the cover Press the cover onto the DoorSense™ unit. ![attaching doorsense cover](https://drive.google.com/uc?id=1MQF30n4ddCl85Tj64PJQA5heaIafwj39) #### Step 6. Calibrate your Lock Once the lock is set up, navigate to the Lock Settings and select Calibrate Lock and select LOCK AND DOORSENSE. Follow the instructions in the app until you have successfully calibrated your August Smart Lock Pro and DoorSense™ together. Open and close the door and validate that the door state is accurate. If it is not accurate or the calibration was unsuccessful, relocate the DoorSense™ housing closer to the August Smart Lock Pro and go through the calibration process again until you get accurate results. If you elected to not insert the screws into the door frame, go back and insert the screws into the housing and secure them into your door frame or wall and place the cover over the housing. If you notice that your readings are not accurate over time, perform another Door State Calibration to see improved performance. ![recalibrating lock](https://drive.google.com/uc?id=1M2ntEERW1VzN2vSsPaeki0xthp_oM7P9) [](#flush-mount) ## Flush Mount Installation You will need a drill and a ⅝” drill bit for this installation. If your door frame is hollow metal, a surface mount installation is the preferred method. If you do choose to flush mount the DoorSense™ unit, take extreme care not to drill the hole too large as to let the magnet assembly fall inside. #### What’s in the box ![included with doorsense](https://drive.google.com/uc?id=1M-ZXYu7CjcF53yxP-VZ79uI8Gq6dY1hp) #### What you’ll need to provide ![tools needed - 5/8" drill bit, electric drill](https://drive.google.com/uc?id=1MxppmWgJjqW0yabrKIRf-OwOhnDXchde) #### Step 1. Remove magnet from housing Using a small blunt object, push the magnet carrier from the housing through the center hole. This may require some force. ![removing magnet](https://drive.google.com/uc?id=1N3_Ou3e2G24px3GVdFo_g-2p4z7QTWTK) #### Step 2. Assemble magnet to cap Expose the adhesive by removing the blue backing. Press the cap onto the notched side of the magnet carrier. The two shapes should interlock. ![affixing magnet in cap](https://drive.google.com/uc?id=1LoVZLaKd0FuP3JCCaQtDtdpUReSDjP3V) #### Step 3. Determine mounting location DoorSense will be flush mounted into the frame of your door, so your Smart Lock swings away when the door is opened. ![determining mounting location](https://drive.google.com/uc?id=1McCUERu2HLvL7fe1MCuDBPYcCZiP0FWd) DoorSense™ should be mounted no more than 1.5 inches from the top edge of your deadbolt strike plate, centered on the frame. ![](https://drive.google.com/uc?id=1Mc0tgKq1HV9x4sTh84TCDgsTL2djHcOw) #### Step 4. Tape drill bit It may be helpful to attach tape to your drill bit to mark the proper depth of hole to drill. DoorSense™ requires a 1/2 inch deep hole, but it may help to use the assembled DoorSense™ as a guide. ![tapped drill bit](https://drive.google.com/uc?id=1Mp-J_WFD8G_eVY_dRgwvbageF6JWulLY) #### Step 5. Drill hole Drill the hole in the proper location on your door frame, keeping the drill straight and steady. ![drilling hole](https://drive.google.com/uc?id=1Lm3fZh24iOCdcp-LWMhmLJPN6WP7DrVD) #### Step 6. Insert DoorSense™ into hole Insert the DoorSense™ into the hole. If it is too snug to push in by hand, you can protect the frame with a piece of scrap wood and use light blows with a hammer or mallet. ![pushing doorsense into hole](https://drive.google.com/uc?id=1Ll_pyai2gY3nGeG-wpN6RabmQqGdaGqD) If you notice that your readings are not accurate over time, perform another Door State Calibration to see improved performance. ##### Related Products: * [Smart Lock Pro, 3rd Gen](https://august.com/products/august-smart-lock-pro-connect) ##### Documents: * [PDF Install Guide](http://in-app-installation-guides.s3-website-us-west-2.amazonaws.com/prod/installation/pdf/installation-guide-asl-pro.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)