Welcome to the Lounge

copilot answer:

The line of code pAdvertising->setMinPreferred(0x06); sets the minimum preferred connection interval for Bluetooth Low Energy (BLE) advertising. Let me explain further:
Connection Interval:
The connection interval is the time between two consecutive data exchanges (connection events) between a BLE peripheral (like an ESP32) and a central device (such as a smartphone).
It determines how often the devices communicate during an active connection.

Preferred Connection Interval:
The preferred connection interval is a range (in milliseconds) that the peripheral suggests to the central device.
It indicates the desired frequency of communication.
In this case, 0x06 corresponds to a connection interval of approximately 7.5 ms (hex value multiplied by 1.25 ms).
Why Set Preferred Connection Interval?:
Setting the preferred connection interval can help improve communication efficiency.
Some devices (like iPhones) may ignore this suggestion, but it’s still good practice to set it.

Additional Notes:
The pAdvertising->setMinPreferred(0x06); line is often used in ESP32 code to enhance compatibility with iOS devices.
You might also see pAdvertising->setMaxPreferred(0x12); to set the maximum preferred connection interval1.

Remember that the actual connection interval negotiated during the connection setup may differ based on the central device’s capabilities and the peripheral’s suggestions. 😊