![]() We will also learn how to configure the nRF5x BLE Physical Layer(PHY) transmission power to target your application range/power demands. In addition to that, we will cover the advertising module in the nRF5 SDK to configure all aspects of the advertising phase of a connection-oriented device. In the exercise part of this lesson, we will setup the device BLE address, name, security settings(Mode and Level), and the preferred connection parameters through GAP SoftDevice API. We will also cover BLE profiles, services, characteristics, device roles and the available network topologies in BLE. As a BLE firmware developer, these two layers are the most layers interacted with in the BLE protocol stack, that is why we will invest some time to master them. GAP provides a standard framework for controlling a BLE device, while GATT provides a standard framework for managing data in a BLE device. GAP and GATT abstract all the underlying BLE layers. In this lesson we will dive into the GAP and GATT layers of the BLE architecture.
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