Host Controller Interface

The Host Controller Interface (HCI) is a standardized protocol that allows a computer's main processor (host) to communicate with its Bluetooth hardware (controller). Think of it as a common language or set of rules enabling seamless data exchange and commands between the device's operating system and the Bluetooth component. This standardization ensures compatibility across different devices and manufacturers, enabling features like wireless audio, data transfer, and connectivity. Essentially, HCI acts as a bridge, making Bluetooth communication smooth, reliable, and universally understandable across various hardware and software platforms.