what is serviceUUID and charactersiticUUID

[MBE007]

i'm using ionic2 framework with BLE plugin to connect nordicsemi devices. i can scan and see the list of devices and also connect to the device , but for reading and writing on device i need serviceUUID and characteristicUUID , below is the signature of read method in ble :

read(deviceId, serviceUUID, characteristicUUID)

and this is the documentation of read and i don't know what string show i pass to read method for reading and writing on device thanks

[bjorn-spockeli]

I am not familiar with the Iconic2 framework, but UUID( Universally Unique ID) is a unique number used to identify services, characteristics and descriptors. We have tutorials on both BLE Services and Characteristics that explain the purpose of the UUID and how its used, I have attached the links to the tutorials below.

Bluetooth low energy Services, a beginner's tutorial

Bluetooth low energy Characteristics, a beginner's tutorial

Bjørn