4.2.1

• Fix file IO for Python 3

4.2.0

• Updated mbed framework to 5.11.5
• Downgraded GCC toolchain to 7.x for mbed

4.1.0

• Updated ARM Mbed OS to v5.11.4
• Use "Smallest Code" optimization profile for Teensy LC and "Faster" for others

4.0.0

• New builder for ARM Mbed OS with support for mbed_app.json and configuration system
• Updated ARM Mbed OS to v5.11.3
• Improved compatibility with ARM Mbed on-line compiler

3.7.1

• Allowed to control firmware optimization (issue #43)
• Fixed warning about "Unknown upload protocol custom"

3.7.0

• Updated Teensyduino to 1.45
• Updated Atmel AVR toolchain to 5.4.0 (for Teensy 2.0)
• Switched to built-in rebooter in "teensy_post_compile" script (resolves issue with uploading to Teensy 3.x) (issue #41)
• Renamed board identifiers for Teensy 2.0: teensy2.0 -> teensy2 and teensy20pp -> teensy2pp

3.6.0

• Move mbed build script to framework-mbed package
• Update mbed to 5.10.1

3.5.0

• Update Arduino framework "Teensyduino" to v1.44

3.4.0

• Update mbed to 5.9.4
• Fix issue with a space in project path when J-LINK is used as uploader

3.3.2

• Use J-Link package from PlatformIO Registry