doc: nrf-bm: lib: add documentation for sensor simulator library

doc/nrf-bm/api/api.rst

@@ -127,6 +127,8 @@ Record Access Control Point
    :inner:
    :members:
 
+.. _api_sensorsim:
+
 Sensor data simulator library
 =============================
 

doc/nrf-bm/libraries/sensorsim.rst

@@ -0,0 +1,44 @@
+.. _lib_sensorsim:
+
+Sensor Simulator
+################
+
+.. contents::
+   :local:
+   :depth: 2
+
+Overview
+********
+
+The sensor simulator library provides functionality for simulating sensor data.
+It currently supports only a triangular waveform simulator.
+
+Configuration
+*************
+
+The library is enabled using the Kconfig system.
+Set the :kconfig:option:`CONFIG_SENSORSIM` Kconfig option to enable the library.
+
+Initialization
+==============
+
+A sensor simulator instance is initialized by calling the :c:func:`sensorsim_init` function, providing a configuration for the minimal, maximum, and start value, plus the increment between each measurement.
+For details on the configuration see the :c:struct:`sensorsim_cfg` structure.
+
+Usage
+*****
+
+After initialization, the :c:func:`sensorsim_measure` function can be called to generate a triangular wave generated sensor measurement.
+
+Dependencies
+************
+
+This library does not have any dependencies.
+
+API documentation
+*****************
+
+| Header file: :file:`include/bm/sensorsim.h`
+| Source files: :file:`lib/sensorsim/`
+
+:ref:`Sensorsim library API reference <api_sensorsim>`