# Develop with client APIs

For application developers on the application processor. The Qualcomm® sensing hub (QSH) client APIs provide a C++ interface that enables Linux applications to access sensor data from the QSH framework running on the low-power processor. Before writing code, see [Messages](https://docs.qualcomm.com/doc/80-80022-7/topic/data_model.html#data-model) to understand the request and event message format.

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</svg> QSH client API workflow

The session lifecycle for client applications: <cite>getSession()</cite>, <cite>open()</cite>, <cite>close()</cite>, <cite>setCallback()</cite>, and <cite>sendRequest()</cite>. Start here before building any sensor application.

https://docs.qualcomm.com/doc/80-80022-7/topic/qsh_client_apis.html#qsh-client-apis

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</svg> Develop applications using the QSH client APIs

Walk through the <cite>SessionClient</cite> sample application. Covers SUID query, attribute query, and streaming call flow with annotated architecture diagrams.

https://docs.qualcomm.com/doc/80-80022-7/topic/develop_app.html#develop-app

**Next steps**

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> [QSH client API workflow](https://docs.qualcomm.com/doc/80-80022-7/topic/qsh_client_apis.html#qsh-client-apis)

Last Published: May 07, 2026

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