diff --git a/.travis.yml b/.travis.yml
index cf53634..ea5ea87 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,16 +1,7 @@
-language: cpp
-
-cache:
-  directories:
-    - ~/arduino_ide
-    - ~/.arduino15/packages/
-git:
-  depth: false
-  quiet: true
-  
-matrix:
+ matrix:
   include:
-    - os: linux
+    - language: cpp
+      os: linux
       addons:
         apt:
           sources:
@@ -20,50 +11,116 @@ matrix:
       env:
         - MATRIX_EVAL="CC=gcc-7 && CXX=g++-7"
         - MODE=LINUX
-    - os: linux
+      cache:
+        directories:
+          - ~/arduino_ide
+          - ~/.arduino15/packages/
+      git:
+        depth: false
+        quiet: true
+        before_install:
+            - downloadArduinoLib() { wget -O $1.zip $2; unzip -o $1.zip -d $HOME/arduino_ide/libraries; }
+            - if [ "$MODE" = "LINUX" ]; then eval "${MATRIX_EVAL}"; fi
+            - if [ "$MODE" = "ARDUINO" ]; then source <(curl -SLs "https://raw.githubusercontent.com/adafruit/travis-ci-arduino/master/install.sh"); fi
+            - if [ "$MODE" = "ARDUINO" ]; then downloadArduinoLib FlashStorage "https://github.com/thelsing/FlashStorage/archive/master.zip"; fi
+            - if [ "$MODE" = "ARDUINO" ]; then downloadArduinoLib BSEC "https://github.com/BoschSensortec/BSEC-Arduino-library/archive/master.zip"; fi
+            # only default warning level
+            - if [ "$MODE" = "ARDUINO" ]; then sed -i 's#compiler.warning_level=all#compiler.warning_level=default#' ~/.arduino15/preferences.txt; fi
+            # changes for bsec lib
+            # samd
+            - if [ "$MODE" = "ARDUINO" ]; then sed -ri 's#(recipe.c.combine.pattern=[^$]*\{archive_file\}")( -Wl,--end-group)#\1 {compiler.libraries.ldflags}\2#' ~/.arduino15/packages/arduino/hardware/samd/1.8.4/platform.txt; fi
+            - if [ "$MODE" = "ARDUINO" ]; then sed -i 's#compiler.elf2hex.extra_flags=#compiler.elf2hex.extra_flags=\ncompiler.libraries.ldflags=#' ~/.arduino15/packages/arduino/hardware/samd/1.8.4/platform.txt; fi
+            # esp8266
+            - if [ "$MODE" = "ARDUINO" ]; then sed -ri 's#(recipe.c.combine.pattern=[^$]*\{compiler.c.elf.libs\})( -Wl,--end-group  "-L\{build.path\}")#\1 {compiler.libraries.ldflags}\2#' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/platform.txt; fi
+            - if [ "$MODE" = "ARDUINO" ]; then sed -i 's#compiler.elf2hex.extra_flags=#compiler.elf2hex.extra_flags=\ncompiler.libraries.ldflags=#' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/platform.txt; fi
+            - if [ "$MODE" = "ARDUINO" ]; then sed -i '/^.*libalgobsec.*$/d' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/tools/sdk/ld/eagle.app.v6.common.ld.h; fi
+            - if [ "$MODE" = "ARDUINO" ]; then sed -ri 's#(\*libwps\.a:\(\.literal\.\* \.text\.\*\))#\1\n    *libalgobsec.a:(.literal.* .text.*)#' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/tools/sdk/ld/eagle.app.v6.common.ld.h; fi
+
+            # the HDC100X lib is not properly set up in githup so move things around a bit
+            - if [ "$MODE" = "ARDUINO" ]; then rm -rf $HOME/arduino_ide/libraries/HDC100X_Arduino_Library-master; fi
+            - if [ "$MODE" = "ARDUINO" ]; then downloadArduinoLib HDC100X "https://github.com/RFgermany/HDC100X_Arduino_Library/archive/master.zip"; fi
+            - if [ "$MODE" = "ARDUINO" ]; then mv $HOME/arduino_ide/libraries/HDC100X_Arduino_Library-master/HDC100X/* $HOME/arduino_ide/libraries/HDC100X_Arduino_Library-master; fi
+            #- buildExampleSketch() { arduino --verify --board $BOARD $PWD/examples/$1/$1.ino; }
+
+        install:
+          - if [ "$MODE" = "ARDUINO" ]; then arduino --install-library "WiFiManager"; fi
+        script:
+             - if [ "$MODE" = "LINUX" ]; then cd knx-linux; fi
+             - if [ "$MODE" = "LINUX" ]; then mkdir -p build; fi
+             - if [ "$MODE" = "LINUX" ]; then cd build; fi
+             - if [ "$MODE" = "LINUX" ]; then cmake ..; fi 
+             - if [ "$MODE" = "LINUX" ]; then make; fi
+            # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-demo; fi
+            # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-sonoffS20; fi
+            # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-bme680; fi
+            # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-hdc1008; fi
+             - if [ "$MODE" = "ARDUINO" ]; then build_platform zero; fi
+             - if [ "$MODE" = "ARDUINO" ]; then build_platform esp8266; fi
+        
+    - language: cpp
+      os: linux
       env:
         - MODE=ARDUINO
+      cache:
+        directories:
+          - ~/arduino_ide
+          - ~/.arduino15/packages/
+      git:
+        depth: false
+        quiet: true
+        before_install:
+            - downloadArduinoLib() { wget -O $1.zip $2; unzip -o $1.zip -d $HOME/arduino_ide/libraries; }
+            - if [ "$MODE" = "LINUX" ]; then eval "${MATRIX_EVAL}"; fi
+            - if [ "$MODE" = "ARDUINO" ]; then source <(curl -SLs "https://raw.githubusercontent.com/adafruit/travis-ci-arduino/master/install.sh"); fi
+            - if [ "$MODE" = "ARDUINO" ]; then downloadArduinoLib FlashStorage "https://github.com/thelsing/FlashStorage/archive/master.zip"; fi
+            - if [ "$MODE" = "ARDUINO" ]; then downloadArduinoLib BSEC "https://github.com/BoschSensortec/BSEC-Arduino-library/archive/master.zip"; fi
+            # only default warning level
+            - if [ "$MODE" = "ARDUINO" ]; then sed -i 's#compiler.warning_level=all#compiler.warning_level=default#' ~/.arduino15/preferences.txt; fi
+            # changes for bsec lib
+            # samd
+            - if [ "$MODE" = "ARDUINO" ]; then sed -ri 's#(recipe.c.combine.pattern=[^$]*\{archive_file\}")( -Wl,--end-group)#\1 {compiler.libraries.ldflags}\2#' ~/.arduino15/packages/arduino/hardware/samd/1.8.4/platform.txt; fi
+            - if [ "$MODE" = "ARDUINO" ]; then sed -i 's#compiler.elf2hex.extra_flags=#compiler.elf2hex.extra_flags=\ncompiler.libraries.ldflags=#' ~/.arduino15/packages/arduino/hardware/samd/1.8.4/platform.txt; fi
+            # esp8266
+            - if [ "$MODE" = "ARDUINO" ]; then sed -ri 's#(recipe.c.combine.pattern=[^$]*\{compiler.c.elf.libs\})( -Wl,--end-group  "-L\{build.path\}")#\1 {compiler.libraries.ldflags}\2#' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/platform.txt; fi
+            - if [ "$MODE" = "ARDUINO" ]; then sed -i 's#compiler.elf2hex.extra_flags=#compiler.elf2hex.extra_flags=\ncompiler.libraries.ldflags=#' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/platform.txt; fi
+            - if [ "$MODE" = "ARDUINO" ]; then sed -i '/^.*libalgobsec.*$/d' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/tools/sdk/ld/eagle.app.v6.common.ld.h; fi
+            - if [ "$MODE" = "ARDUINO" ]; then sed -ri 's#(\*libwps\.a:\(\.literal\.\* \.text\.\*\))#\1\n    *libalgobsec.a:(.literal.* .text.*)#' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/tools/sdk/ld/eagle.app.v6.common.ld.h; fi
 
-before_install:
-    - downloadArduinoLib() { wget -O $1.zip $2; unzip -o $1.zip -d $HOME/arduino_ide/libraries; }
-    - if [ "$MODE" = "LINUX" ]; then eval "${MATRIX_EVAL}"; fi
-    - if [ "$MODE" = "ARDUINO" ]; then source <(curl -SLs "https://raw.githubusercontent.com/adafruit/travis-ci-arduino/master/install.sh"); fi
-    - if [ "$MODE" = "ARDUINO" ]; then downloadArduinoLib FlashStorage "https://github.com/thelsing/FlashStorage/archive/master.zip"; fi
-    - if [ "$MODE" = "ARDUINO" ]; then downloadArduinoLib BSEC "https://github.com/BoschSensortec/BSEC-Arduino-library/archive/master.zip"; fi
-    # only default warning level
-    - if [ "$MODE" = "ARDUINO" ]; then sed -i 's#compiler.warning_level=all#compiler.warning_level=default#' ~/.arduino15/preferences.txt; fi
-    # changes for bsec lib
-    # samd
-    - if [ "$MODE" = "ARDUINO" ]; then sed -ri 's#(recipe.c.combine.pattern=[^$]*\{archive_file\}")( -Wl,--end-group)#\1 {compiler.libraries.ldflags}\2#' ~/.arduino15/packages/arduino/hardware/samd/1.8.4/platform.txt; fi
-    - if [ "$MODE" = "ARDUINO" ]; then sed -i 's#compiler.elf2hex.extra_flags=#compiler.elf2hex.extra_flags=\ncompiler.libraries.ldflags=#' ~/.arduino15/packages/arduino/hardware/samd/1.8.4/platform.txt; fi
-    # esp8266
-    - if [ "$MODE" = "ARDUINO" ]; then sed -ri 's#(recipe.c.combine.pattern=[^$]*\{compiler.c.elf.libs\})( -Wl,--end-group  "-L\{build.path\}")#\1 {compiler.libraries.ldflags}\2#' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/platform.txt; fi
-    - if [ "$MODE" = "ARDUINO" ]; then sed -i 's#compiler.elf2hex.extra_flags=#compiler.elf2hex.extra_flags=\ncompiler.libraries.ldflags=#' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/platform.txt; fi
-    - if [ "$MODE" = "ARDUINO" ]; then sed -i '/^.*libalgobsec.*$/d' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/tools/sdk/ld/eagle.app.v6.common.ld.h; fi
-    - if [ "$MODE" = "ARDUINO" ]; then sed -ri 's#(\*libwps\.a:\(\.literal\.\* \.text\.\*\))#\1\n    *libalgobsec.a:(.literal.* .text.*)#' ~/.arduino15/packages/esp8266/hardware/esp8266/2.6.2/tools/sdk/ld/eagle.app.v6.common.ld.h; fi
+            # the HDC100X lib is not properly set up in githup so move things around a bit
+            - if [ "$MODE" = "ARDUINO" ]; then rm -rf $HOME/arduino_ide/libraries/HDC100X_Arduino_Library-master; fi
+            - if [ "$MODE" = "ARDUINO" ]; then downloadArduinoLib HDC100X "https://github.com/RFgermany/HDC100X_Arduino_Library/archive/master.zip"; fi
+            - if [ "$MODE" = "ARDUINO" ]; then mv $HOME/arduino_ide/libraries/HDC100X_Arduino_Library-master/HDC100X/* $HOME/arduino_ide/libraries/HDC100X_Arduino_Library-master; fi
+            #- buildExampleSketch() { arduino --verify --board $BOARD $PWD/examples/$1/$1.ino; }
 
-    # the HDC100X lib is not properly set up in githup so move things around a bit
-    - if [ "$MODE" = "ARDUINO" ]; then rm -rf $HOME/arduino_ide/libraries/HDC100X_Arduino_Library-master; fi
-    - if [ "$MODE" = "ARDUINO" ]; then downloadArduinoLib HDC100X "https://github.com/RFgermany/HDC100X_Arduino_Library/archive/master.zip"; fi
-    - if [ "$MODE" = "ARDUINO" ]; then mv $HOME/arduino_ide/libraries/HDC100X_Arduino_Library-master/HDC100X/* $HOME/arduino_ide/libraries/HDC100X_Arduino_Library-master; fi
-    #- buildExampleSketch() { arduino --verify --board $BOARD $PWD/examples/$1/$1.ino; }
+        install:
+          - if [ "$MODE" = "ARDUINO" ]; then arduino --install-library "WiFiManager"; fi
+        script:
+             - if [ "$MODE" = "LINUX" ]; then cd knx-linux; fi
+             - if [ "$MODE" = "LINUX" ]; then mkdir -p build; fi
+             - if [ "$MODE" = "LINUX" ]; then cd build; fi
+             - if [ "$MODE" = "LINUX" ]; then cmake ..; fi 
+             - if [ "$MODE" = "LINUX" ]; then make; fi
+            # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-demo; fi
+            # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-sonoffS20; fi
+            # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-bme680; fi
+            # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-hdc1008; fi
+             - if [ "$MODE" = "ARDUINO" ]; then build_platform zero; fi
+             - if [ "$MODE" = "ARDUINO" ]; then build_platform esp8266; fi
     
-install:
-  - if [ "$MODE" = "ARDUINO" ]; then arduino --install-library "WiFiManager"; fi
-script:
-     - if [ "$MODE" = "LINUX" ]; then cd knx-linux; fi
-     - if [ "$MODE" = "LINUX" ]; then mkdir -p build; fi
-     - if [ "$MODE" = "LINUX" ]; then cd build; fi
-     - if [ "$MODE" = "LINUX" ]; then cmake ..; fi 
-     - if [ "$MODE" = "LINUX" ]; then make; fi
-    # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-demo; fi
-    # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-sonoffS20; fi
-    # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-bme680; fi
-    # - if [ "$MODE" = "ARDUINO" ]; then buildExampleSketch knx-hdc1008; fi
-     - if [ "$MODE" = "ARDUINO" ]; then build_platform zero; fi
-     - if [ "$MODE" = "ARDUINO" ]; then build_platform esp8266; fi
-     
-     
+    - language: python
+      python:
+        - "2.7"
+      cache:
+        directories:
+          - "~/.platformio"
+      env:
+        - PLATFORMIO_CI_SRC=examples/knx-usb
+      install:
+        - pip install -U platformio
+        - platformio update      
+      script:
+        - platformio ci --project-conf=examples/knx-usb/platformio.ini          
+      
 notifications:
   email:
     on_success: change