freecodecamp.orgHow AOSP 16 Bluetooth Scanner Works: The Ultimate GuideAh, Bluetooth. The technology we all love to hate. It's like that one friend who's always just about to connect, but then... doesn't. For years, Android developers have been locked in a dramatic, often tragic, romance with Bluetooth. We've wrestled w...Feb 4·60 min read
freecodecamp.orgHow Does Extended Bluetooth Advertising Work in AOSP?Bluetooth Low Energy advertising has always been one of those things developers “just use” until it breaks in subtle, painful ways. You set a name, throw in a UUID, maybe add some manufacturer data, and hope everything fits. For years, the unspoken r...Jan 27·40 min read
freecodecamp.orgHow Bluetooth Low Energy Devices Work: GATT Services and Characteristics ExplainedEvery time you check your smartwatch for heart rate, read the battery level of wireless earbuds, unlock a Bluetooth smart lock, or watch sensor data stream into an app, you are experiencing the result of GATT working quietly in the background. GATT i...Dec 3, 2025·38 min read
freecodecamp.orgHow to Scale Bluetooth Across Android, iOS, and Embedded DevicesBluetooth is one of those inventions that seems magical the first time you use it. You turn on a gadget, pair it with your phone, and suddenly they are talking to each other without a single wire in sight. Music plays through your headphones, your sm...Nov 13, 2025·37 min read
freecodecamp.orgHow Bluetooth Socket Settings Power Android’s Low Power Island: A Friendly Deep Dive into AOSP’s Hidden Energy SaverPicture this: you’re sitting in a café with your laptop open, phone on the table, smartwatch buzzing every few minutes, and Bluetooth earbuds playing music. From your perspective, life is peaceful. From your phone’s perspective, it’s juggling a ridic...Nov 13, 2025·15 min read
