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readme: updated introduction paragraph

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Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
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Mihai Tudor Panu 2016-05-06 12:00:53 -07:00
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UPM (Useful Packages & Modules) Sensor/Actuator repository for MRAA UPM (Useful Packages & Modules) Sensor/Actuator repository for MRAA
============== ==============
UPM is a high level repository for sensors that use MRAA. Each sensor links The UPM repository provides software drivers for a wide variety of commonly
to MRAA and are not meant to be interlinked although some groups of sensors used sensors and actuators. These software drivers interact with the
may be. Each sensor contains a header which allows to interface with it. underlying hardware platform (or microcontroller), as well as with the attached
Typically a sensor is represented as a class and instantiated. sensors, through calls to [MRAA](github.com/intel-iot-devkit/mraa) APIs.
The constructor is expected to initialise the sensor and parameters may be used Programmers can access the interfaces for each sensor by including the sensor’s
to provide identification/pin location on the board. corresponding header file and instantiating the associated sensor class. In the
typical use case, a constructor initializes the sensor based on parameters that
identify the sensor, the I/O protocol used and the pin location of the sensor.
Typically an update() function will be called in order to get new data from the C++ interfaces have been defined for the following sensor/actuator types, but
sensor in order to reduce load when doing multiple reads to sensor data. they are subject to change:
Although implementation and API design is up to the developer, C++ interfaces have
been defined for the following sensor/actuator types and developers are encouraged to
implement them. Interface header files are in the src/upm folder.
* Light controller * Light controller
* Light sensor * Light sensor
* Temperature sensor * Temperature sensor
* Humidity sensor * Humidity sensor
* Pressure sensor * Pressure sensor
* Gas sensor
* Analog to digital converter * Analog to digital converter
Feedback on interface design and additions for new types are welcome The developer community is encouraged to help expand the list of supported
sensors and actuators and provide feedback on interface design.
### Example ### Example