Here's a list summarizing some of the key undergoing changes to our library from earlier versions:

v1.7.1

• Bumped library compatibility to new MRAA 2.0 APIs
• Added installation details for Fedora
• Minor fixes based on static analysis vulnerability report

v1.7.0

• Added Cordova bindings based on Java packages
• Complete rework of the nmea_gps library giving more control over data acquisition and parsing
• Added GTest support for unit tests
• Removed calls to deprecated MRAA fast GPIO functions
• Several bug fixes and improvements around SWIG type maps and gcc8 support
• New sensors: kx122, kxtj3, bh1792, bh1749

v1.6.0

• Extended LED library to support the new MRAA gpio-leds APIs
• Many CMake changes around SWIG wrapper generation and improved FindNodejs detection module
• Several code fixes based on static code analysis
• Improved documentation generation and Travis CI builds
• Cleaned-up doxygen tags in headers and class names in JSON library files
• New sensor: lis3dh

v1.5.0

• Introduced a flexible JSON format for technical sensor specifications, notes and classification. This is also used by our new UPM website
• Revised all C++ sensor examples and switched to stack allocations where possible along with other code and formatting clean-up
• Significantly improved docker workflow, CI integration, sanity and consistency tests, static code scans and documentation generation
• Several improvements to a couple of existing sensor drivers and better compatibility with subplatforms
• Added new std::vector to AbstractList<> typemap for Java bindings and examples
• New sensors: lis2ds12, lsm6ds3h, lsm6dsl, lidarlitev3

v1.3.0

• Finalized all required build system and JAVA binding changes to release the UPM libraries for Android Things targets
• Enhanced the modules for lsm303 and tmp006 to support newer variants of the chips
• Fixed Node.js detection on Ubuntu when installed with apt using official packages
• Minor documentation changes
• New sensors: lsm303agr, lsm303d, veml6070, tca9548a, rn2903

v1.2.0

• Improved JAVA binding compiler compatibility and added JAVA interfaces that match existing C++ interfaces
• Ported Bosch drivers to C thus now they can be used on supported MCUs
• Completely redesigned C/C++ example handling by cmake to avoid maintaining a list by hand
• Fixed several existing drivers, mostly based on static code analysis reports
• Added a sensor driver template plus bash script that can be easily used by developers to start writing their own sensor driver
• Numerous documentation improvements
• New sensors: p9813, abp, rsc, mmc35240, tcs37727, tmp006, mma8x6x, mag3110, hdc1000

v1.1.0

• Reworked cmake handling of internal and external dependencies
• Documentation improvements for sensor names, sensor descriptions, external contributor guides and added new section on installing UPM on a supported OS
• Fixed issues with C11 builds on some WRLinux gateways and Debian systems
• New examples and functionality for speaker and ads1x15 modules
• Modified JAVA builds to ensure the SWIG generated wrappers include all functionality and typemaps
• New sensors: mcp2515, max30100, uartat, le910

v1.0.2

• Minor cmake changes for Java builds and Java examples are now toggled with the same BUILDEXAMPLES cmake switch
• Made some improvements in the utilities class for our C drivers
• Fixed issue with some drivers not being usable on subplatforms due to pin numbers using uint8 type
• New sensors: ims, ecezo, mb704x, rf22

v1.0.1

• Warnings as errors enabled for C/CXX (fixed warnings from -Wall and others)
• Fix for C/CXX compile flag append issue #485
• C sensor libraries for: my9221, otp538u, guvas12d, ppd42ns
• New sensor: ms5803

v1.0.0

• Added approximately 50 C sources for UPM drivers that can be used on both Unix and RTOS boards
• Provided generic alternatives to the Grove set of classes as they will be deprecated over time and eventually removed
• UPM modules are now being packed and published on NPM as sources rather than binaries to enhance compatibility with various boards and systems
• Build both python2 and python3 modules if the corresponding python libs are available and removed cmake BUILDPYTHON3 switch
• Converted python examples to run on both python2 and python3
• Added 'upm' hierarchy to python module install path which changes the way UPM modules are imported Example: old: import pyupm_dfrph new: from upm import pyupm_dfrph or import upm.pyupm_dfrph
• Added ctests for consistancy checking UPM repo as well as sanity checking for python2/3 modules and examples
• Various documentation and driver fixes throughout
• New sensors: nmea_gps, mma7361, bh1750, hka5, dfrorp, dfrec, sht1x

v0.8.0

• Extended l3gd20 driver to support I2C connections in addition to IIO
• Updated ads1x15, mcp9808 and ssd1306 I2C drivers to not throw a fatal exception if they fail to set a different I2C speed
• Added extra functionality to apa102 driver, backlight control to jhd1313m1 LCDs and fixed htu21d
• Improved documentation with build dependencies, refreshed the list of known limitations and simplified the component name for a few sensors

v0.7.3

• Fixed several existing drivers and updated Grove Temperature sensor to use new formula for v1.1+ by default
• Separated codebase for upm_grove module that bundles some of the starter kit sensors into individual source files
• Documentation and doxygen tag updates with correct spelling for Celsius in several places, this also affects API compatibility
• Removed superfluous BUILDSWIG option, some build recipes might be impacted
• New sensor: ms5611

v0.7.2

• Mraa 1.1.1 required changes to UPM drivers and examples for IIO core kernel support
• Rev'ed libmraa requirement to 1.1.1

v0.7.1

• Fix for building python2 vs python3 bindings
• Fixes for jhd1313m1 row/font size and reset
• Added bacnet utility class
• New sensors: bmx055, bmi055, bmc160, bma250e, bmg150, bmm150, t8100, tb7300

v0.7.0

• C++ header files have been renamed from *.h to *.hpp along with all Intel provided examples and code samples to allow for native C drivers
• Updated driver compatibility to new MRAA 1.0 API
• First sensor implementations for our newly added Dallas One Wire support
• Several fixes based on issues reported on Github
• Changed SWIG linking strategy, more robust Travis CI build checks
• New sensors: ds2413, ds18b20, bmp280, bno055, l3gd20

v0.6.2

• Added a generic driver for taking snapshots from an USB camera device
• New API changes section in documentation to let users know when the UPM API gets modified
• Fixed some spelling errors and improved JavaScript documentation builds with newer versions of YUI and Node
• Enhanced Cmake scripts and the build process
• New sensors: vcap, e50hx

v0.6.1

• Fixed library build process for different configurations across multiple environments reported by users.
• Fixed multiple GFX library header clash and improved SSD1351 compatibility by changing SPI mode
• Added Node and Python array typemaps for nrf24l01
• Added 2 new JAVA examples

v0.6.0

• Introduced C++ Interfaces for several sensor categories that will help consolidate the sensor APIs with uniform function names upon implementation
• Greatly improved Node.js detection and handling during build and install, and should be now compatible with all major versions
• Added a driver for the Curie IMU (accelerometer + gyroscope) that works with the new Firmata support implemented by MRAA
• Continued to provide several JAVA fixes and examples
• Many new industrial and maker sensors: cwlsxxa, teams, tex00, h803x, apa102, smartdrive, bmi160, bme280, ds1808lc, hlg150, lp8860, max44009, si1132, t6713, si7005, ssd1351

v0.5.1

• Updated the API and added new functionality for the MY9221 class and derived sensors: grovecircularled and groveledbar, along with new code samples that show these changes
• Provided a fix for one JAVA example that uses interrupts and updated library install paths
• Several documentation improvements and pictures were added for new sensors
• A few other sensors received minor patches

v0.5.0

• First implementations for industrial grade Modbus sensors, along with first sensor examples that use the new iio system driver in MRAA
• Significant improvements to the stepmotor driver that will now allow precise control using any GPIO pin and extended the API with new functionality
• Further improved JAVA bindings and sensor ISRs have been modified to implement Runnable objects
• Improved Python typemaps and error checking, documentation now includes detailed function descriptions
• Simplified the build process by eliminating the need to define redundant MRAA related environment variables
• New sensors: nlgpio16, ads1x15, t3311, hdxxvxta, hwxpxx, rhusb, ili9341, apds9930, kxcjk1013

v0.4.1

• Over 150 supported sensor drivers including some industrial grade devices
• Improved the JAVA bindings, added a large number of examples for sensors, enabled JAVA builds in Travis CI, and introduced automatic loading for the JAVA shared libraries
• Continued to improve existing sensor drivers and to enhance them with the new C++ coding style and exception types
• Several cmake improvements to allow building on various Linux distributions and with a newer version of Node.JS
• Simplified adding and building of C++ sensor examples via cmake
• New sensors: micsv89, xbee, urm37, adxrs610, bma220, dfrph, mcp9808, sx1276, groveultrasonic, ozw

v0.4.0

• Fully functional and documented JAVA language bindings for sensors with several examples also available
• Added standardized exception handling support across all language bindings and updated sensors to use this feature
• Sensor drivers are now available and can be installed individually using NPM for Node.js users
• Continuous Integration with Travis CI ensures new contributions are built automatically once they are received
• API rewrite and improvements for hcsr04, sm130, eboled, loudness
• Documentation improvements and code style changes from C to C++
• New sensors: hyld9767, mg811, wheelencoder, grovegprs, mpu9250, ssd1306, es9257, lm35, mq4, mq6, mq7, mq8

v0.3.2

• Introduced RPM package generation feature from cmake via cpack
• Performed a thorough documentation review and merged resulting changes, includes last remaining images and grouping sensors by kits
• Added support for Sparkfun Sensor Blocks (OLED & IMU)
• Fully reworked API for at42qt1070, mpu9150 and lcd classes, while maintaining backwards compatibility for existing lcd displays
• Extended doxygen tags for better integration with automated documentation generators
• New sensors: rgbringcoder, hp20x, pn532, sainsmartks, lsm9ds0, eboled

v0.3.1

• Updated index pages for API documentation and cross-linked them
• More images were added for Grove, Adafruit and Sparkfun sensors along with licensing information
• Applied a set of patches to improve code robustness
• Added support for Grove NFC Tag sensor
• Fixed several typos in library and sensor names
• New sensor: m24lr64e

v0.3.0

• Provided automated, updated and comprehensive sensor API documentation for C++, Python and JavaScript
• Edited sensor names, library descriptions and doxygen tags for consistency
• Fixed the TH02 sensor driver and made major improvements to i2clcd driver
• Added new and updated images for numerous new and existing sensors
• Started this changelog
• New sensors: sx6119, si114x, maxsonarez, hm11, ht9170, h3lis331dl, ad8232, grovescam

v0.2.0

• Passed 100 supported sensor drivers
• Updated header files with new doxygen tags for improved API documentation generation
• Added python examples for sensors
• Fixed the buzzer and servo drivers for the Intel Edison
• Renamed bmp and gp2y sensor classes to be more generic
• Completely revamped implementation for tm1637
• New sensors: mma7660, cjq4435, adxl335, hmtrp, nunchuck, otp538u, l298, groveelectromagnet, grovecollision, adis16448, at42qt1070, grovemd, ina132, grovegsr, groveo2, groveemg, pca9685, pca9685ss, adafruitms1438, hx711, flex, groveeldriver, mhz16, apds9002, waterlevel, zfm20, uln200xa, grovewfs, isd1820

v0.1.9

• Passed 50 supported sensor drivers
• Starter Kit and Additional Roadshow and Hackaton sensors added
• Several examples and documentation updates submitted
• Wrote new proper SWIG typemaps for arrays
• Fixed the i2clcd write function, improved several other sensors
• New sensors: rpr220, rotaryencoder, biss0001, rfr359f, grovespeaker, mq303a, ppd42ns, wt5001, yg1006, ublox6, mpr121, groveloudness, guvas12d, grovewater, grovevdiv, grovelinefinder, ta12200, groveehr, grovemoisture, gp2y0a, a110x, ds1307, adc121c021, enc03r, ttp223, itg3200, am2315, tp401, ldt0028, htu21d, mpl3115a2, lsm303, joystick12, tsl2561, groverotary, groveslider, adxl345, grovebutton, lol, groverelay

v0.1.8

• Added MQ series gas sensors and a few others
• Generated Doxygen layout file to improve API look and feel
• Several sensor documentation updates

v0.1.7

• Fixed SWIG node build issues
• Added lpd8806 digital led strip

v0.1.6

• Fixed SWIG python builds
• Extended i2clcd devices with new functions
• Made SWIG interface improvements and added extra types
• Added nrf8001 BLE support
• Few other sensor additions and fixes

v0.1.5

• New drivers for microphone and mpu9150
• Added generic driver for stepper motors
• Updated all code to use MRAA and version dependency

v0.1.4

• Added new bmp/gy pressure sensor and updated servo
• Started UPM documentation and related pages
• Updated MRAA dependencies

v0.1.3

• Updated SWIG support for some sensors
• New sensor support for mma7455 accelerometer

v0.1.2

• Several new sensors added
• Documentation fixes
• IPK generation

v0.1.1

• Updated MRAA dependency

v0.1.0

• Initial release with some basic grove sensors and hmc5883
• Doxygen and SWIG support implemented