Test scenario for BLE Connection and Data Exchange

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Test Case: BLE Connection and Data Exchange
Objective: To verify that a BLE peripheral and BLE central device can connect successfully, exchange data reliably, and handle disconnections properly.

Devices: One BLE peripheral (e.g., a BLE sensor or development board) and one BLE central (e.g., a smartphone or BLE development board).
Software: BLE communication application or test tool for interaction with BLE services and characteristics.

Test Steps:

Prepare Devices: Ensure both BLE peripheral and BLE central devices are powered on and in a state where they can perform BLE operations.
BLE Services and Characteristics: Configure the BLE peripheral with specific services and characteristics for testing (e.g., a heart rate service with a heart rate measurement characteristic).

Start Scanning: On the BLE central device, start scanning for BLE devices.
Verify Discovery: Confirm that the BLE peripheral is detected by the central device. The peripheral should be listed in the scan results with its advertised name or UUID.

NOTE: these steps vary by device a lot. Example: Oculus has OTA, while Google Assitant and some wearables not necessarily utilize OTA.

Initiate Connection: On the BLE central device, initiate a connection to the BLE peripheral.
Verify Connection: Confirm that the connection is established successfully. The central device should show a connected status, and the peripheral should acknowledge the connection.

Discover Services: On the central device, discover the services offered by the peripheral. Discover Characteristics: Locate the characteristics associated with the discovered services.
Read Characteristic: Perform a read operation on a characteristic (e.g., read the value of a temperature characteristic from the peripheral).
Write Characteristic: Write a value to a characteristic (e.g., send a configuration value to the peripheral).
Subscribe to Notifications/Indications: Subscribe to notifications or indications for a characteristic (e.g., subscribe to heart rate measurements).
Verify Data Reception: Ensure that the central device receives notifications or indications as expected and that the data matches the expected format.

Maintain Connection: Verify that the connection remains stable during data exchange, with no unexpected disconnections or errors.
Test Connection Parameters: Optionally, test different connection parameters (e.g., connection interval, slave latency) to observe their impact on performance and stability.

Simulate Interference: Introduce potential sources of interference (e.g., other BLE devices) and observe the impact on connection stability and data exchange.
Disconnect and Reconnect: Disconnect the BLE central from the peripheral and then reconnect to ensure the connection can be reestablished correctly.

Successful Discovery: The BLE peripheral should be discoverable by the central device.
Connection Established: The connection between the peripheral and central should be established without issues.
Reliable Data Exchange: Data read and write operations should be performed successfully, and notifications/indications should be received as expected.
Stable Connection: The connection should remain stable throughout the test, with minimal interference or disruptions.
Correct Data Handling: The data exchanged should be accurate and consistent with expected values.

Document the results of the device discovery, connection status, data exchange operations, and connection stability.
Include any issues encountered, such as failed connections or data discrepancies.
For Agile - retro provide recommendations based on the findings, such as improvements needed for better performance or reliability.