Barry Butler asked 5 years ago
I have started working through the MIT App Inventor course. However, I have a Bluetooth LE device (Adafruit Circuitplaygound Bluefruit) rather than an older Bluetooth device. The BLE connection is no problem, but sending data requires a Service UUID and a Characteristic UUID.
Are these identifiers determined already for each device or do I create my own (at https://www.uuidgenerator.net/)?
Thanks, Barry Butler
SDBURTON answered 5 years ago
For expermenting and development you can ‘wing it’ with a generated ID. There is a reserved range of IDs to avoid as described in this document:
https://www.novelbits.io/uuid-for-custom-services-and-characteristics/
Getting a permanent UUID is expensive, but only necessary for devices that will need to be absolutely, positively unique across the world.