DEV Community: getnopeek The latest articles on DEV Community by getnopeek (@getnopeek). https://dev.to/getnopeek https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3953224%2F5aaa24d4-ca8b-4722-9cb5-3e268b1a915e.png DEV Community: getnopeek https://dev.to/getnopeek en How I built an app to detect Meta Ray-Ban glasses using immutable BLE company IDs getnopeek Tue, 26 May 2026 20:45:31 +0000 https://dev.to/getnopeek/how-i-built-an-app-to-detect-meta-ray-ban-glasses-using-immutable-ble-company-ids-3cfe https://dev.to/getnopeek/how-i-built-an-app-to-detect-meta-ray-ban-glasses-using-immutable-ble-company-ids-3cfe <p>Meta has sold 7M+ Ray-Ban smart glasses. They look <br> identical to normal glasses. They record video and <br> audio silently.</p> <p>After Harvard students demonstrated real-time facial <br> recognition using them on strangers in public, I built <br> NoPeek — a free Android app that detects them via <br> Bluetooth.</p> <h2> The key insight </h2> <p>MAC address randomization made BLE fingerprinting <br> unreliable. But the Manufacturer Specific Data field <br> in every BLE ADV frame contains a company ID in <br> bytes 0-1 that is:</p> <ul> <li>Assigned by Bluetooth SIG</li> <li>Immutable — cannot be rotated or randomized</li> <li>Broadcast on every advertisement packet</li> </ul> <h2> Key company IDs </h2> <div class="table-wrapper-paragraph"><table> <thead> <tr> <th>Company ID</th> <th>Vendor</th> <th>Device</th> </tr> </thead> <tbody> <tr> <td>0x0D53</td> <td>Luxottica</td> <td>Meta Ray-Ban</td> </tr> <tr> <td>0x03C2</td> <td>Snapchat</td> <td>Spectacles</td> </tr> <tr> <td>0x01AB</td> <td>Meta Platforms</td> <td>Quest/Ray-Ban</td> </tr> <tr> <td>0x0BA7</td> <td>Pico</td> <td>Pico VR</td> </tr> <tr> <td>0x00E0</td> <td>HTC</td> <td>Vive</td> </tr> </tbody> </table></div> <h2> False positive prevention </h2> <p>Apple's 0x004C is used by ALL Apple devices.<br> NoPeek requires BOTH company ID AND device name <br> "Vision Pro" — so your iPhone never triggers alerts.</p> <h2> The app </h2> <p>Built with Kotlin. Foreground service for background <br> scanning. Path-loss model for distance estimation.<br> No internet permission. Fully local.</p> <p>GitHub: github.com/getnopeek/nopeek-android</p> <h2> What's next </h2> <p>Looking for contributors especially:</p> <ul> <li>New device signatures</li> <li>iOS port</li> <li>False positive reports</li> </ul> android privacy security showdev