nRF52840 generic attribute profile

[Ethan]

Where to find nRF52840 generic attribute profile

[Simonr]

Sorry, but I'm still not clear on what exactly you're after, so I'll provide some links. 

• Bluetooth GATT specifications
• nRF52840 Product Specification
• nRF5 SDK Download (With examples using various GATT services)

Best regards,

Simon

[awneil]

Tutorials on setting up GATT Services & Characteristics on nRF parts:

https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-services-a-beginners-tutorial

https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-characteristics-a-beginners-tutorial

As Simonr says, the SDK contains examples - there's both BT SIG Standard profiles, and proprietary ones...

Ethan said:

implement communication interface from Mobile App via BLE

Unless you have a specific Standard profile in mind, the proprietary Nordic UART Service (NUS) might be a good place to start for transferring arbitrary data ...

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/ble_sdk_app_nus_eval.html