diff --git a/examples/BridgeSetup.cpp b/examples/BridgeSetup.cpp
index 0c92780..ebc950a 100644
--- a/examples/BridgeSetup.cpp
+++ b/examples/BridgeSetup.cpp
@@ -1,3 +1,27 @@
+/**
+    \file BridgeSetup.cpp
+    Copyright Notice\n
+    Copyright (C) 2021  Jan Rogall		- developer\n
+
+    This file is part of hueplusplus.
+
+    hueplusplus is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    hueplusplus is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with hueplusplus.  If not, see <http://www.gnu.org/licenses/>.
+
+    \brief This example connects to a bridge with hardcoded mac and username.
+**/
+
+
 #include <algorithm>
 #include <iostream>
 
@@ -21,6 +45,7 @@ namespace hue = hueplusplus;
 const std::string macAddress = "";
 const std::string username = "";
 
+//! \brief Connects to a bridge and returns it.
 hue::Bridge connectToBridge()
 {
     hue::BridgeFinder finder(std::make_shared<SystemHttpHandler>());
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 7dccbf0..c0ed8b1 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,13 +1,18 @@
-add_executable(bridge_setup BridgeSetup.cpp )
+add_executable(bridge_setup BridgeSetup.cpp)
 set_property(TARGET bridge_setup PROPERTY CXX_STANDARD 14)
 set_property(TARGET bridge_setup PROPERTY CXX_EXTENSIONS OFF)
 target_link_libraries(bridge_setup hueplusplusstatic)
 
-add_executable(lights_off LightsOff.cpp )
+add_executable(lights_off LightsOff.cpp)
 set_property(TARGET lights_off PROPERTY CXX_STANDARD 14)
 set_property(TARGET lights_off PROPERTY CXX_EXTENSIONS OFF)
 target_link_libraries(lights_off hueplusplusstatic)
 
 
+add_executable(username_config UsernameConfig.cpp)
+set_property(TARGET lights_off PROPERTY CXX_STANDARD 14)
+set_property(TARGET lights_off PROPERTY CXX_EXTENSIONS OFF)
+target_link_libraries(username_config hueplusplusstatic)
+
 add_custom_target(hueplusplus_examples)
 add_dependencies(hueplusplus_examples bridge_setup lights_off)
\ No newline at end of file
diff --git a/examples/LightsOff.cpp b/examples/LightsOff.cpp
index 9c75a8f..3396ce8 100644
--- a/examples/LightsOff.cpp
+++ b/examples/LightsOff.cpp
@@ -1,3 +1,26 @@
+/**
+    \file LightsOff.cpp
+    Copyright Notice\n
+    Copyright (C) 2021  Jan Rogall		- developer\n
+
+    This file is part of hueplusplus.
+
+    hueplusplus is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    hueplusplus is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with hueplusplus.  If not, see <http://www.gnu.org/licenses/>.
+
+    \brief This example turns off all lights for 20 seconds, then turns them on again.
+**/
+
 #include <thread>
 
 #include <hueplusplus/Bridge.h>
@@ -20,6 +43,7 @@ namespace hue = hueplusplus;
 const std::string macAddress = "";
 const std::string username = "";
 
+//! \brief Connects to a bridge and returns it.
 hue::Bridge connectToBridge()
 {
     hue::BridgeFinder finder(std::make_shared<SystemHttpHandler>());
@@ -55,6 +79,9 @@ hue::Bridge connectToBridge()
     return finder.getBridge(*it);
 }
 
+//! \brief Turns off the lights on the bridge for 20 seconds.
+//! 
+//! Only turns the lights back on that were on before.
 void lightsOff(hue::Bridge& hue)
 {
     std::vector<hue::Light> lights = hue.lights().getAll();
@@ -64,7 +91,7 @@ void lightsOff(hue::Bridge& hue)
     for (hue::Light& l : lights)
     {
         onMap.emplace(l.getId(), l.isOn());
-        l.Off();
+        l.off();
     }
 
     // This would be preferrable, but does not work because it also resets the brightness of all lights
diff --git a/examples/UsernameConfig.cpp b/examples/UsernameConfig.cpp
new file mode 100644
index 0000000..2643404
--- /dev/null
+++ b/examples/UsernameConfig.cpp
@@ -0,0 +1,148 @@
+/**
+    \file UsernameConfig.cpp
+    Copyright Notice\n
+    Copyright (C) 2021  Jan Rogall		- developer\n
+
+    This file is part of hueplusplus.
+
+    hueplusplus is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    hueplusplus is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with hueplusplus.  If not, see <http://www.gnu.org/licenses/>.
+
+    \brief This example reads the username and mac address from a config file.
+**/
+
+#include <algorithm>
+#include <fstream>
+#include <iomanip>
+#include <iostream>
+
+#include <hueplusplus/Bridge.h>
+
+#ifdef _MSC_VER
+#include <hueplusplus/WinHttpHandler.h>
+
+using SystemHttpHandler = hueplusplus::WinHttpHandler;
+
+#else
+#include <hueplusplus/LinHttpHandler.h>
+
+using SystemHttpHandler = hueplusplus::LinHttpHandler;
+
+#endif
+
+namespace hue = hueplusplus;
+
+//! \brief Reads a json config file.
+//! \param filename Path to the config file
+//! \returns Parsed json or an empty object if not successful.
+nlohmann::json readConfigFile(const std::string& filename)
+{
+    std::ifstream stream(filename);
+    try
+    {
+        nlohmann::json result = nlohmann::json::object();
+        if (stream)
+        {
+            stream >> result;
+        }
+        return result;
+    }
+    catch (const nlohmann::json::exception&)
+    {
+        // Ignore parse errors
+        return nlohmann::json::object();
+    }
+}
+
+//! \brief Saves a json file.
+//! \param filename Path to the config file
+//! \param config Json value to save
+void saveConfigFile(const std::string& filename, const nlohmann::json& config)
+{
+    std::ofstream stream(filename);
+    stream << std::setw(4) << config;
+}
+
+//! \brief Connects to a bridge and returns it
+//! \param username Already existing username, can be left empty.
+//! \param macAddress MAC address of the bridge, can be left empty.
+//! \throws std::runtime_error When the bridge was not found.
+//! \returns A connected bridge.
+hue::Bridge connectToBridge(const std::string& username, const std::string& macAddress)
+{
+    hue::BridgeFinder finder(std::make_shared<SystemHttpHandler>());
+
+    std::vector<hue::BridgeFinder::BridgeIdentification> bridges = finder.findBridges();
+
+    for (const auto& bridge : bridges)
+    {
+        std::cout << "Bridge: " << bridge.mac << " at " << bridge.ip << '\n';
+    }
+    if (bridges.empty())
+    {
+        std::cout << "Found no bridges\n";
+        throw std::runtime_error("no bridges found");
+    }
+
+    if (macAddress.empty())
+    {
+        std::cout << "No bridge given, connecting to first one.\n";
+        return finder.getBridge(bridges.front());
+    }
+    if (!username.empty())
+    {
+        finder.addUsername(macAddress, username);
+    }
+    auto it = std::find_if(
+        bridges.begin(), bridges.end(), [&](const auto& identification) { return identification.mac == macAddress; });
+    if (it == bridges.end())
+    {
+        std::cout << "Given bridge not found\n";
+        throw std::runtime_error("bridge not found");
+    }
+    return finder.getBridge(*it);
+}
+
+//! Connects to a bridge. The steps are:
+//! - read "config.json" for an existing config
+//! - connect to the bridge
+//! - save the username to the config file for the next run
+//! 
+//! Also prints out the IP and username.
+int main(int argc, char** argv)
+{
+
+    const std::string filename = "config.json";
+    try
+    {
+
+        nlohmann::json config = readConfigFile(filename);
+        const std::string username = config.value("username", "");
+        const std::string macAddress = config.value("mac", "");
+        hue::Bridge hue = connectToBridge(username, macAddress);
+
+        // Store updated information into file
+        config["username"] = hue.getUsername();
+        config["mac"] = hue.config().getMACAddress();
+        saveConfigFile(filename, config);
+
+        std::cout << "Connected to bridge. IP: " << hue.getBridgeIP() << ", username: " << hue.getUsername() << '\n';
+    }
+    catch (...)
+    { }
+
+    std::cout << "Press enter to exit\n";
+    std::cin.get();
+
+    return 0;
+}
\ No newline at end of file