Hitchhiker's Guide to Bluetooth Low Energy (BLE)!

Video Description

Beacons, GAP, GATT, HCI... so confusing! Come chat Internet of Things (IoT) and BLE with me and we'll explore central, peripheral, beacons, and more :) NOTE: I'll probably do a follow up SPECIFICALLY about programming BLE apps - since there's so much variance in the APIs and libraries I couldn't fit it into this one, but it's totally worth exploring. I know this video was dense, so cheers for sitcking around. Chapters: 00:00 - Intro to BLE 01:09 - BLE Stack Layers (booooringggg) 02:44 - How to see all these hidden devices?? 03:43 - What's a Bluetooth Beacon? 04:14 - Apple's Find My and BLE Beacons 04:51 - BLE Advertisement Packets! 06:10 - BLE Advertisement Data Types 08:08 - Why code examples for BLE are super tricky 09:15 - Linux Python code for a BLE Beacon! 11:06 - Breaking down raw BLE Beacon Packet data 14:24 - "Connectionless" vs "Connectioned" Bluetooth 15:14 - Generic Access Profile (GAP) Roles 17:37 - Generic Attribute Profiles (GATT) - how devices interact! 19:16 - GATT Characteristics 20:15 - UUIDs in BLE 22:24 - GATT Roles (Client and Server) 23:19 - GATT Characteristic Operations (What can we do with our partner?) 25:48 - Setting up a GATT Server in C code! 27:53 - Connecting to the Peripheral and subscribing for notifications HCI info: https://software-dl.ti.com/lprf/simplelink_cc2640r2_latest/docs/blestack/ble_user_guide/html/ble-stack-3.x/hci.html Advertisement packet info: https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-2-bluetooth-le-advertising/topic/advertisement-packet/ Bluetooth Adv Data Types: https://www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/CSS_v11/out/en/supplement-to-the-bluetooth-core-specification/data-types-specification.html Zephyr GAP defines: https://docs.zephyrproject.org/apidoc/latest/group__bt__gap__defines.html Python example: https://hoff.industries/files/beacon_ex.py Bluez Peripheral Python lib: https://bluez-peripheral.readthedocs.io/en/stable/ Nordic BLE examples: https://github.com/NordicSemiconductor/pc-ble-driver/tree/master/examples GAP info: https://developerhelp.microchip.com/xwiki/bin/view/applications/ble/introduction/bluetooth-architecture/bluetooth-host-layer/gap/ GAP appearance defs: https://software-dl.ti.com/lprf/simplelink_cc2640r2_sdk/1.35.00.33/exports/docs/ble5stack/ble_user_guide/html/doxygen/group___g_a_p___appearance___values.html UUID generator: https://www.uuidgenerator.net/ BLE Assigned Numbers: https://www.bluetooth.com/wp-content/uploads/Files/Specification/Assigned_Numbers.html GATT overview: https://developerhelp.microchip.com/xwiki/bin/view/applications/ble/introduction/bluetooth-architecture/bluetooth-host-layer/bluetooth-generic-attribute-profile-gatt/ GATT operations: https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-4-bluetooth-le-data-exchange/topic/gatt-operations/ NRF52840 Dongle: https://www.nordicsemi.com/Products/Development-hardware/nRF52840-Dongle