> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# API

This section provides the complete API reference for the Qualcomm® sensing hub (QSH). Use these references when developing sensor applications on the application processor or writing sensor drivers and algorithms on the low-power processor.

<CardGroup cols={2}>
  <Card title="Qualcomm® sensing hub APIs" href="./qsh_api_reference">
    Full syntax reference for `getSession()`, `open()`, `close()`, `setCallback()`, `sendRequest()`, feature APIs, and direct channel APIs for high-rate applications such as OIS.
  </Card>
</CardGroup>