* Disable knx-usb example
* Update python to 3.8
* Enable knx-usb example
* Update to Arduino 1.8.11
* Pin to version 1.8.11
* Use python 3.7
* Use python 3.8 and fix path
* Fix paths and remove obsolete stuff
* Add lib Wire to deps.
* Use Adafruit TinyUSB lib version 0.7.1
* Update .travis.yml
* Update platformio.ini
* Update .travis.yml
* Fix compilation
* Change platformio config
* Try to fix travis build
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* save work
* Add new pio config for CI
* save work
* save work
* save work
* save work
* Try to fix CI run for example knx-linux
* Fix compilation
* Try to fix ESP8266 compilation
* Do not enable cEMI server per default. Is only enabled during platformio build externally