When referring to the multiple link types of a Bluetooth dual-mode module with multi-connection capabilities, it means that this module can establish and manage several different types of Bluetooth connections simultaneously. These multiple link types can serve various purposes and are commonly used in diverse applications.
Classic Bluetooth (BR/EDR) Link: This link type is used for classic Bluetooth connections, also known as Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) connections. It’s commonly used for audio streaming (e.g., connecting to headphones or speakers), file transfers, and connecting to peripherals like keyboards and mice.
Bluetooth Low Energy (BLE) Link: BLE is designed for low-power, intermittent communication with devices like fitness trackers, heart rate monitors, and other Internet of Things (IoT) devices. A multi-link dual-mode module can establish multiple BLE connections concurrently, allowing it to communicate with several BLE devices simultaneously.
Synchronous Connection-Oriented (SCO) Link: SCO links are typically used for voice communication. A dual-mode module capable of multiple links can establish multiple SCO links for handling multiple voice calls simultaneously.
Asynchronous Connection-Less (ACL) Link: ACL links are used for data transmission, including non-real-time data like file transfers. A multi-link module can establish multiple ACL links to connect with multiple devices for data exchange.
Enhanced Synchronous Connection-Oriented (eSCO) Link: eSCO is an enhanced version of SCO that provides better audio quality, error correction, and other enhancements for voice communication. A multi-link module might support multiple eSCO links for high-quality voice calls.
LE Audio: This is an advanced audio standard within BLE that allows for features like multi-stream audio, which enables the simultaneous connection of multiple audio devices, such as hearing aids or headphones, to a single source.
Broadcasting Link: Some Bluetooth modules can broadcast information without establishing a connection. This is often used in beacon technology or for sending information to nearby devices. A multi-link module might be capable of broadcasting to multiple devices at once.
The specific capabilities of a Bluetooth dual-mode module can vary depending on its hardware and firmware. Manufacturers may provide documentation detailing the number and types of links that a particular module supports. Developers and engineers can then use this information to design applications that make the most of the module’s multi-connection capabilities for various use cases.