The Bluetooth Special Interest Group (SIG) has standardized many pieces of the Bluetooth process. This includes some of the UUID (universally unique identifier) values. These values are used in determining what services and characteristics your app is interested in. Common functions have defined UUIDs and you can create custom values also.
- [Instructor] When working with Bluetooth LE,…universally unique IDs are used in several places.…For one, each peripheral has its own UUID,…meaning each physical device has a specific ID…that's associated with it.…Later we'll see how we can store this ID…and later use it to reconnect to known devices.…Also, services are identified with UUIDs.…Many of these are registered when they're common.…So a lot of services that are used…by a variety of devices have had their services registered…and you can use those as the UUID.…
In that case,…you only need the four-digit number…and Core Bluetooth will create the rest of the UUID for you.…Similarly, characteristics are also identified with UUID.…If they're common and also have been registered,…they can be identified…with the four-digit hex value, as well.…A lot of these, you'll notice, are health-related,…and there's more than there are the services,…because generally services have multiple characteristics.…You can also generate your own UUID…to be used for your peripheral in the service…
- Bluetooth Low Energy (BLE) basics
- Core Bluetooth key classes
- Scanning for peripherals
- Discovering services and characteristics
- Writing to a characteristic
- Reconnecting to peripherals
- Apps as peripherals
Skill Level Intermediate
1. BLE Basics
2. Scanning, Connecting, and Discovering
3. Writing to a Characteristic
Adding additional features10m 43s
4. An App as a Peripheral
Next steps1m 7s
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