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Release: updated release notes for 2014.12
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Oleg Hahm
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RIOT-2014.12 - Release Notes
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============================
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RIOT is a real-time multi-threading operating system that supports a range of
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devices that are typically found in the Internet of Things: from 8-bit
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microcontrollers to light-weight 32-bit processors.
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RIOT is based on the following design principles: energy-efficiency, real-time
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capabilities, small memory footprint, modularity, and uniform API access,
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independent of the underlying hardware (this API offers partial POSIX
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compliance).
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New features
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============
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Core
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----
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+ introduced new thread_yield() and renamed the old implementation to thread_yield_higher()
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Supported platforms
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-------------------
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Additional support for the following boards:
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+ Arduino Mega 2560 (first-time support of an 8-bit platform)
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+ HikoB Fox
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+ Atmel samr21-Xplained Pro
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+ OpenMote
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+ cc2538 Developer Kit
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+ Spark-Core
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+ f4vi1
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+ Airfy-Beacon
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+ STMF0Discovery Board
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+ STMF3Discovery Board
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+ STMF4Discovery Board
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+ nrf51822 Development Kit
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+ yunjia-nrf51822
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+ MSB-IoT
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+ native on ARM platforms
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Drivers
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-------
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+ various peripheral drivers (ADC, UART, timer, SPI, I²C, RTC, RTT, DAC, PWM...)
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+ MQ-3 alcohol sensor
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+ ISL29020 light sensor
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+ LPS331AP pressure sensor
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+ LSM303DLHC accelerometer
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+ L3G4200D gyroscope
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+ servo motor
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+ TI HDC 1000 low power humidity and temperature digital sensor
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+ SRF02/SRF08 ultrasonic range sensors
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+ PIR motion sensor
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+ RGB LED
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Network Stack
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---------------
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+ AODVv2
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+ RPL non-storing mode
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+ OF manager for RPL
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+ Source Routing Header support
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+ introduced netapi
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+ introduced netdev, a general interface for network device drivers
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+ introduced global packet buffer
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System libraries
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----------------
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+ CBOR
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+ UBJSON
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+ color module for PWM
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Packages
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--------
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+ libfixmath
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Other
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-----
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+ C++ support for most platforms
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+ PCAP based wireless sniffer
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Changes
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=======
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Core
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----
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* PIDs begin with 1
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* mamximum 16 priority levels for every platform
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* fixed sched_switch()
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* simplified mutex signatures
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* minimized size of TCB
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* allow hwtimer to run with more than 1MHz
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* imported ringbuffer from sys
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Supported platforms
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-------------------
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* improved iot-lab_M3 support
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* major improvements on the mbed LPC1768
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* improved at86rf231 radio driver
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* fixed hwtimer for MSP430
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* added support for timer B for MSP430
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* fixed thread_yield() for MSP430
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* several fixes for the cc2420
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* improved interrupt handling on ARM
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* adjusted stack sizes for Cortex platforms
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Network Stack
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---------------
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* refactored CCN-lite
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* refactored RPL
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* renamed destiny to transport_layer and socket_base
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* several fixes for TCP
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* split UDP and TCP
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System libraries
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----------------
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- removed hashtable implementation
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Packages
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--------
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* updated and simplified OpenWSN
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Other
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-----
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* Improved and cleaned up build system
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* various new helper targets (like debug, distclean, reset, objdump...)
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* use newlib's nano specs if available
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* various new features and added Python 3 compatibility for pyterm
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* major reduction of warnings in doxygen and improved html layout
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Fixed Issues from the last release
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==================================
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#426: Interrupt handling on MSP430 is buggy
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Several fixes by @rousselk
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#1798: core: first thread on runqueue is scheduled twice
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Was fixed along with the thread_yield() refactoring
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#1127: Random build fails on OSX
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native is building stable also on OSX now
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Known Issues
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============
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network related issues
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----------------------
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#21: Deal with stdin in bordermultiplex.c
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Not all supported platforms provide a stdin in the current release.
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However, the implementation of the 6LoWPAN border router won't work
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without stdin.
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#861: neighbor discovery for 6LoWPAN not working
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Duplicate address detection according to RFC 6775 is also missing.
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#1577: ccn-lite: populate does not work with disabled cache
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If cache is set to zero, the chunks cannot be loaded and therefore also not get populated.
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#1870: IPv6 neighbor advertisements are malformed
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According to Wireshark, ICMPv6 neighbor advertisements are malformed (wrong
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checksum or other reasons).
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native related issues
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---------------------
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#495: native not float safe
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When the FPU is used when an asynchronous context switch occurs, either the
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stack gets corrupted or a floating point exception occurs.
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#499: native is segfaulting on heavy network usage
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Sending more than 100 packets per second causes a SEGFAULT in RIOT native.
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#534: native debugging on osx fails
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Using valgrind or gdb with a nativenet target in OSX leads to "the network"
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being stuck (gdb) or the whole process being stuck (valgrind).
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#715: test_hwtimer_wait fails on native
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The problem appears to be lost signals and depends on the CPU speed.
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#787: reboot not working with open file descriptors on native
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If for example a tap device is in use, the reboot command fails.
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#862: sometimes the tap bridge does not work in native
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Sometimes (rather suddenly) packages are not received by a TAP and won't be
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received even if I reconfigure the bridge.
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other platform related issues
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-----------------------------
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#1232: x86 doesn't build on OS X with clang
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Current version of the x86 port doesn't build for OS X with clang.
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#1442: setting channel is not persistent cc2420
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After changing the channel via a shell command, the channel reverts back to an arbitrary
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value. However, this might be only a shell problem.
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#1753: vtimer_msg test crashes after ~49'20"
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dependent on the platform, vtimer stops working after some time.
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#1891: printf formatting does not work properly on some Cortex platforms for 64 bit numbers
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This problem happens mostly for the Newlib nano, which does not support 64 bit integer
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printing, but sometimes happens also with other toolchains.
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#1964 and #1955: eventual problems with IoT-LAB M3 nodes in the testbed
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The shell is sometimes not properly working after a reboot and the PDR is sometimes
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worse than expected.
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#2143: tests.core doesn't compile for all platforms
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For some missing GCC compiler builtins, the unittests do not compile for MSP430
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platforms.
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#2228: samd21 stack sizes are too small
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The application examples/default for example will crash when issuing the txtsnd command
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other issues:
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--------------
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#1449: a removed vtimer might still get called back by hwtimer
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The timer callback might still fire even after vtimer_remove() was called.
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#2175: valgrind registeres "Invalid write of size 4" in unittests for ubjson
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According to valgrind the stack gets corrupted in UBJSON.
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For all issues and open pull requests please check the RIOT issue tracker:
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https://github.com/RIOT-OS/RIOT/issues
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Special Thanks
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--------------------
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We like to give our special thanks to all the companies that provided us with their hardware for porting and testing, namely the people from (in alphabetical order): airfy, Atmel, ELL-i, Intel, IoT-Lab, mbed, Phytec, and Udoo
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More information
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================
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http://www.riot-os.org
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Mailing lists
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-------------
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* RIOT OS kernel developers list
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* devel@riot-os.org (http://lists.riot-os.org/mailman/listinfo/devel)
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* RIOT OS users list
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* users@riot-os.org (http://lists.riot-os.org/mailman/listinfo/users)
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* RIOT commits
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* commits@riot-os.org (http://lists.riot-os.org/mailman/listinfo/commits)
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* Github notifications
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* notifications@riot-os.org (http://lists.riot-os.org/mailman/listinfo/notifications)
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License
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=======
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* All sources and binaries that have been developed at Freie Universität Berlin
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and most of the other code are licensed under the GNU Lesser General Public
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License version 2 as published by the Free Software Foundation.
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* Some external sources, especially files developed by SICS are published under
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a separate license.
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All code files contain licensing information.
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RIOT-2014.05 - Release Notes
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============================
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RIOT is a real-time multi-threading operating system that supports a range of
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