fix build break

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
           cd ~/arduino*
           ./install.sh
           ./arduino --pref "boardsmanager.additional.urls=https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json" --save-prefs
-          ./arduino --install-boards esp32:esp32
+          ./arduino --install-boards esp32:esp32:2.0.9
       - name: Install Arduino CMake Toolchain
         uses: actions/checkout@v2
         with:

CMakeLists.txt

@@ -50,6 +50,7 @@ set(SRCFILES
         NetworkLock.cpp
         NetworkOpener.cpp
         networkDevices/NetworkDevice.h
+        networkDevices/NetworkDevice.cpp
         networkDevices/WifiDevice.cpp
         networkDevices/W5500Device.cpp
         networkDevices/EthLan8720Device.cpp