UPM is a high level repository for sensors that use MRAA. Each sensor links to MRAA and are not meant to be interlinked although some groups of sensors may be. Each sensor contains a header which allows to interface with it. Typically a sensor is represented as a class and instantiated.

The constructor is expected to initialise the sensor and parameters may be used to provide identification/pin location on the board.

Typically an update() function will be called in order to get new data from the sensor in order to reduce load when doing multiple reads to sensor data.

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 sensor
• Temperature sensor
• Humidity sensor
• Pressure sensor
• Analog to digital converter

Feedback on interface design and additions for new types are welcome

A sensor/actuator is expected to work as such (here is the MMA7660 accelerometer API):

  // Instantiate an MMA7660 on I2C bus 0
  upm::MMA7660 *accel = new upm::MMA7660(MMA7660_I2C_BUS,
                                         MMA7660_DEFAULT_I2C_ADDR);

  // place device in standby mode so we can write registers
  accel->setModeStandby();

  // enable 64 samples per second
  accel->setSampleRate(upm::MMA7660::AUTOSLEEP_64);
  
  // place device into active mode
  accel->setModeActive();

  while (shouldRun)
    {
      int x, y, z;
      
      accel->getRawValues(&x, &y, &z);
      cout << "Raw values: x = " << x 
           << " y = " << y
           << " z = " << z
           << endl;
      
      float ax, ay, az;
      
      accel->getAcceleration(&ax, &ay, &az);
      cout << "Acceleration: x = " << ax 
           << "g y = " << ay
           << "g z = " << az
           << "g" << endl;
      
      usleep(500000);
    }

Browse through the list of all examples.

Multi-sensor samples for the starter and specialized kits can be found in the iot-devkit-samples repository.

Supported sensor list from API documentation.

You can also refer to the Intel® IoT Developer Zone.

If you would like to create projects and run the UPM samples using an Intel recommended IDE, please refer to the Intel Developer Zone IDE page.

See building documentation here.

Porting link has more information on making new UPM modules.

There is also an example available gfor max31855 sensor.

Guide on creating Java bindings.

Before you begin development, take a look at our naming conventions.

Also, please read the guidelines for contributions to UPM.

Don't forget to check the documentation section.

Make sure you add yourself as an author on every new code file submitted. If you are providing a fix with significant changes, feel free to add yourself as a contributor. Signing-off your commits is mandatory.

Even if we try our best not to, every once in a while we are forced to modify our API in a way that will break backwards compatibility. If you find yourself unable to compile code that was working fine before a library update, make sure you check the API changes section first.

NOTE - Our C++ header files will change their extension from .h to .hpp in the upcoming version.

Version changelog here.

List of known limitations here.