diff --git a/embedded/lib/Component/Component.hpp b/embedded/lib/Component/Component.hpp
index 344d781..b730b9f 100644
--- a/embedded/lib/Component/Component.hpp
+++ b/embedded/lib/Component/Component.hpp
@@ -5,9 +5,7 @@
 
 enum class ComponentType {
     Digital,
-    Analog,
-    I2C,
-    Serial
+    Analog
 };
 
 class Component{
diff --git a/embedded/lib/Component/DHTComponent.cpp b/embedded/lib/Component/DHTComponent.cpp
new file mode 100644
index 0000000..76e98ee
--- /dev/null
+++ b/embedded/lib/Component/DHTComponent.cpp
@@ -0,0 +1,28 @@
+#include "DHTComponent.hpp"
+
+DHTComponent::DHTComponent(uint8_t type, byte pin)
+    : _pin(pin), _type(type), _dht(nullptr)
+{}
+
+DHTComponent::~DHTComponent()
+{
+    delete _dht;
+}
+
+void DHTComponent::setup()
+{
+    _dht = new DHT_Unified(_pin, _type);
+    _dht->begin();
+}
+
+float DHTComponent::getHumidity()
+{
+    _dht->humidity().getEvent(&_event);
+    return _event.relative_humidity;
+}
+
+float DHTComponent::getTemperature()
+{
+    _dht->temperature().getEvent(&_event);
+    return _event.temperature;
+}
diff --git a/embedded/lib/Component/DHTComponent.hpp b/embedded/lib/Component/DHTComponent.hpp
new file mode 100644
index 0000000..0421ecf
--- /dev/null
+++ b/embedded/lib/Component/DHTComponent.hpp
@@ -0,0 +1,23 @@
+#ifndef _HEADER_COMPONENT_DHT
+#define _HEADER_COMPONENT_DHT
+#include <Adafruit_Sensor.h>
+#include <DHT.h>
+#include <DHT_U.h>
+
+class DHTComponent
+{
+public:
+    DHTComponent(uint8_t type, byte pin);
+    ~DHTComponent();
+    void setup();
+    float getHumidity();
+    float getTemperature();
+
+private:
+    byte _pin;
+    uint8_t _type;
+    DHT_Unified* _dht;
+    sensors_event_t _event;
+};
+
+#endif // _HEADER_COMPONENT_LED
\ No newline at end of file
diff --git a/embedded/lib/Component/LedComponent.cpp b/embedded/lib/Component/LedComponent.cpp
new file mode 100644
index 0000000..8d482dc
--- /dev/null
+++ b/embedded/lib/Component/LedComponent.cpp
@@ -0,0 +1,42 @@
+#include "LedComponent.hpp"
+
+Color Color::operator-(byte value)
+{
+    byte nullbyte(0);
+    return {(this->red - value) < 0 ? nullbyte : static_cast<byte>(this->red - value),
+            (this->blue - value) < 0 ? nullbyte : static_cast<byte>(this->blue - value),
+            (this->green - value) < 0 ? nullbyte : static_cast<byte>(this->green - value)};
+}
+
+LedComponent::LedComponent(byte pin, byte pin_clock, uint8_t led_number)
+    : _pin(pin), _pinClock(pin_clock), _ledNumber(led_number), _led(nullptr)
+{
+}
+
+LedComponent::~LedComponent()
+{
+    delete _led;
+}
+
+void LedComponent::setup()
+{
+    _led = new ChainableLED(_pinClock, _pin, _ledNumber);
+}
+
+void LedComponent::setColor(LedNumber led_number, Color color)
+{
+    _led->setColorRGB(static_cast<byte>(led_number), color.red, color.green, color.blue);
+}
+
+void LedComponent::setColor(LedNumber led_number, Color color, uint16_t fading_time)
+{
+    const auto redFade = color.red / (static_cast<float>(fading_time));
+    const auto greenFade = color.green / (static_cast<float>(fading_time));
+    const auto blueFade = color.blue / (static_cast<float>(fading_time));
+
+    for (uint16_t time(0); time < fading_time; time++)
+    {
+        _led->setColorRGB(static_cast<byte>(led_number), static_cast<byte>(redFade * time), static_cast<byte>(greenFade * time), static_cast<byte>(blueFade * time));
+        delay(1);
+    }
+}
\ No newline at end of file
diff --git a/embedded/lib/Component/LedComponent.hpp b/embedded/lib/Component/LedComponent.hpp
new file mode 100644
index 0000000..6b5380c
--- /dev/null
+++ b/embedded/lib/Component/LedComponent.hpp
@@ -0,0 +1,45 @@
+#ifndef _HEADER_COMPONENT_LED
+#define _HEADER_COMPONENT_LED
+#include "Component.hpp"
+#include <ChainableLED.h>
+
+struct Color
+{
+    byte red;
+    byte green;
+    byte blue;
+
+    Color operator-(byte value);
+};
+
+namespace LedColors
+{
+    constexpr Color LED_OFF = {0,0,0};
+    constexpr Color WIFI_ON = {0x18,0x28,0x36};
+    constexpr Color NO_WIFI = {0x64,0x04,0x0B};
+    constexpr Color TOO_DRY = {0xB3,0x58,0x1B};
+    constexpr Color TOO_WET = {0x1B,0x09,0x3F};
+}
+
+enum class LedNumber {
+    LED_HARDWARE = 0,
+    LED_PLANT = 1
+};
+
+class LedComponent
+{
+public:
+    LedComponent(byte pin, byte pin_clock, uint8_t led_number);
+    ~LedComponent();
+    void setup();
+    void setColor(LedNumber led_number, Color color);
+    void setColor(LedNumber led_number, Color color, uint16_t fading_time);
+
+private:
+    byte _pin;
+    byte _pinClock;
+    uint8_t _ledNumber;
+    ChainableLED* _led;
+};
+
+#endif // _HEADER_COMPONENT_LED
\ No newline at end of file
diff --git a/embedded/lib/Component/MainComponent.cpp b/embedded/lib/Component/MainComponent.cpp
new file mode 100644
index 0000000..da5053c
--- /dev/null
+++ b/embedded/lib/Component/MainComponent.cpp
@@ -0,0 +1,22 @@
+#include "MainComponent.hpp"
+
+MainComponent::MainComponent()
+    : _humidity(ComponentType::Analog, PIN_A0), _led(D8, D7, 2), _dht(DHT11, D3)
+{
+}
+
+MainComponent::~MainComponent()
+{}
+
+void MainComponent::setup()
+{
+    _led.setup();
+    _dht.setup();
+    // Lights are off when powered
+    _led.setColor(LedNumber::LED_HARDWARE,{0,0,0});
+    _led.setColor(LedNumber::LED_PLANT,{0,0,0});
+}
+
+Component& MainComponent::getHumidity() { return _humidity; }
+LedComponent& MainComponent::getLed() { return _led; }
+DHTComponent& MainComponent::getDHT() { return _dht; }
diff --git a/embedded/lib/Component/MainComponent.hpp b/embedded/lib/Component/MainComponent.hpp
new file mode 100644
index 0000000..e7dfe87
--- /dev/null
+++ b/embedded/lib/Component/MainComponent.hpp
@@ -0,0 +1,34 @@
+#ifndef _HEADER_COMPONENT_MAIN
+#define _HEADER_COMPONENT_MAIN
+
+#include "Component.hpp"
+#include "LedComponent.hpp"
+#include "DHTComponent.hpp"
+
+class MainComponent {
+public:
+    // Singleton
+    static MainComponent& GetInstance()
+    {
+        static MainComponent instance;
+        return instance;
+    }
+    // Public functions
+    void setup();
+    Component& getHumidity();
+    LedComponent& getLed();
+    DHTComponent& getDHT();
+private:
+    // Singleton
+    MainComponent();
+    ~MainComponent();
+    MainComponent(const MainComponent&) = delete;
+    MainComponent& operator=(const MainComponent&) = delete;
+    
+    // Components
+    Component _humidity;
+    LedComponent _led;
+    DHTComponent _dht;
+};
+
+#endif //
\ No newline at end of file
diff --git a/embedded/lib/Display/Screen.cpp b/embedded/lib/Display/Screen.cpp
index 22af48d..7c00467 100644
--- a/embedded/lib/Display/Screen.cpp
+++ b/embedded/lib/Display/Screen.cpp
@@ -1,12 +1,11 @@
 #include "Screen.hpp"
+
+#include "MainComponent.hpp"
 #include <vector>
 #include <memory>
 
 // XBM Files
 #include "../Pictures/failed.xbm"
-#include "../Pictures/humidity.xbm"
-#include "../Pictures/thermometer.xbm"
-#include "../Pictures/air_humidity.xbm"
 
 using namespace Display;
 
@@ -33,9 +32,9 @@ void Screen::Setup(uint8_t *font)
   auto plantHumidity = TextBox("plantHumidity", StyleWidth::LEFT, StyleHeight::TOP, U8G2_BTN_BW0, 0, 0);
   auto airTemperature = TextBox("airTemperature", StyleWidth::LEFT, StyleHeight::CENTERED, U8G2_BTN_BW0, 0, 0);
   auto airHumidity = TextBox("airHumidity", StyleWidth::LEFT, StyleHeight::BOTTOM, U8G2_BTN_BW0, 0, 6);
-  auto humidityPicture = SpriteBox(humidity_bits,humidity_width,humidity_height,StyleWidth::LEFT,StyleHeight::CENTERED);
-  auto thermometerPicture = SpriteBox(thermometer_bits,thermometer_width,thermometer_height,StyleWidth::LEFT,StyleHeight::CENTERED);
-  auto airHumidityPicture = SpriteBox(air_humidity_bits,air_humidity_width,air_humidity_height,StyleWidth::LEFT,StyleHeight::CENTERED);
+  auto humidityPicture = SpriteBox(ICONS[0].data,ICONS[0].width,ICONS[0].height,StyleWidth::LEFT,StyleHeight::CENTERED);
+  auto thermometerPicture = SpriteBox(ICONS[1].data,ICONS[1].width,ICONS[1].height,StyleWidth::LEFT,StyleHeight::CENTERED);
+  auto airHumidityPicture = SpriteBox(ICONS[2].data,ICONS[2].width,ICONS[2].height,StyleWidth::LEFT,StyleHeight::CENTERED);
 
   // Config Boxes
   plantHumidity.SetOffset(OFFSET_TEXT,12);
@@ -126,16 +125,19 @@ void Screen::boot()
   _bootFrame++;
   bootWindow.Update(0,CLOVER_FRAMES[(_bootFrame >= 10 ? 10 : _bootFrame)]);
   _screen->sendBuffer();
+
+  // Shutting down led when finished booting
+  if(_bootFrame == MAX_BOOT_FRAMES)
+    MainComponent::GetInstance().getLed().setColor(LedNumber::LED_HARDWARE,LedColors::LED_OFF);
 }
 
-void Screen::loop(const float plantHumidity, const float airTemperature, const float airHumidity, const float light)
+void Screen::loop(const float plantHumidity, const float airTemperature, const float airHumidity)
 {
   _screen->clearBuffer();
   // Updating with values
   loopWindow.Update(0,String("Hum: ")+String(plantHumidity,1)+String("%"));
   loopWindow.Update(1,String("Tem: ")+String(airTemperature,1)+String("°C"));
   loopWindow.Update(2,String("Hum: ")+String(airHumidity,1)+String("%"));
-  //loopWindow.Update(3,String("Light: ")+String(light,1)+String("%"));
   // Component
   loopWindow.Display();
   iconWindow.Display();
@@ -143,6 +145,15 @@ void Screen::loop(const float plantHumidity, const float airTemperature, const f
   _screen->sendBuffer();
 }
 
+void Screen::setWarningIcon(Sensors sensorId, bool warning)
+{
+  const auto realId = static_cast<size_t>(sensorId);
+  if(warning)
+    iconWindow.Update(realId,ICONS_WARNING[realId]);
+  else
+    iconWindow.Update(realId,ICONS[realId]);
+}
+
 uint16_t Screen::getHeight() { return _height; }
 uint16_t Screen::getWidth() { return _width; }
 U8G2_SSD1306_128X64_NONAME_F_HW_I2C &Screen::getScreen() { return *_screen; }
diff --git a/embedded/lib/Display/Screen.hpp b/embedded/lib/Display/Screen.hpp
index c92c9c5..d4ded26 100644
--- a/embedded/lib/Display/Screen.hpp
+++ b/embedded/lib/Display/Screen.hpp
@@ -20,6 +20,14 @@
 #include "../Pictures/clover10.xbm"
 #include "../Pictures/clover11.xbm"
 
+// Icons
+#include "../Pictures/humidity.xbm"
+#include "../Pictures/thermometer.xbm"
+#include "../Pictures/air_humidity.xbm"
+#include "../Pictures/humidity-warning.xbm"
+#include "../Pictures/thermometer-warning.xbm"
+#include "../Pictures/air_humidity-warning.xbm"
+
 namespace Display
 {
     constexpr Picture CLOVER_FRAMES[] = {
@@ -35,10 +43,26 @@ namespace Display
         {clover10_bits, clover10_width, clover10_height},
         {clover11_bits, clover11_width, clover11_height},
     };
+    constexpr Picture ICONS[] = {
+        {humidity_bits,humidity_width,humidity_height},
+        {thermometer_bits,thermometer_width,thermometer_height},
+        {air_humidity_bits,air_humidity_width,air_humidity_height},
+    };
+    constexpr Picture ICONS_WARNING[] = {
+        {humidity_warning_bits,humidity_warning_width,humidity_warning_height},
+        {thermometer_warning_bits,thermometer_warning_width,thermometer_warning_height},
+        {air_humidity_warning_bits,air_humidity_warning_width,air_humidity_warning_height},
+    };
     constexpr uint8_t MAX_BOOT_FRAMES = 25;
     constexpr uint8_t OFFSET_ICONS = 55;
     constexpr uint8_t OFFSET_TEXT = 75;
 
+    enum class Sensors {
+        SOIL_MOISTURE = 0,
+        THERMOMETER,
+        AIR_HUMIDITY
+    };
+
     class Screen
     {
     public:
@@ -54,7 +78,8 @@ namespace Display
         void notConnected();
         void connected(const char *ipaddress, uint8_t timing);
         void boot();
-        void loop(const float plantHumidity, const float airTemperature, const float airHumidity, const float light);
+        void loop(const float plantHumidity, const float airTemperature, const float airHumidity);
+        void setWarningIcon(Sensors sensorId, bool warning=true);
         // Getters
         uint16_t getHeight();
         uint16_t getWidth();
diff --git a/embedded/lib/Pictures/air_humidity-warning.xbm b/embedded/lib/Pictures/air_humidity-warning.xbm
new file mode 100644
index 0000000..6c0ab19
--- /dev/null
+++ b/embedded/lib/Pictures/air_humidity-warning.xbm
@@ -0,0 +1,6 @@
+#define air_humidity_warning_width 16
+#define air_humidity_warning_height 16
+static unsigned char air_humidity_warning_bits[] = {
+   0x60, 0x00, 0x90, 0x00, 0x18, 0x01, 0x24, 0x02, 0x42, 0x0a, 0x42, 0x0a,
+   0x04, 0x19, 0x90, 0x3c, 0x38, 0x3e, 0x28, 0x7f, 0x6c, 0x7f, 0x6c, 0x7e,
+   0xfe, 0x3e, 0xee, 0x1e, 0xfe, 0x0e, 0x00, 0x00 };
diff --git a/embedded/lib/Pictures/humidity-warning.xbm b/embedded/lib/Pictures/humidity-warning.xbm
new file mode 100644
index 0000000..6586a03
--- /dev/null
+++ b/embedded/lib/Pictures/humidity-warning.xbm
@@ -0,0 +1,6 @@
+#define humidity_warning_width 16
+#define humidity_warning_height 16
+static unsigned char humidity_warning_bits[] = {
+   0x00, 0x00, 0x00, 0x00, 0x80, 0x01, 0x80, 0x01, 0x40, 0x03, 0x40, 0x03,
+   0x80, 0x07, 0x90, 0x0f, 0xb8, 0x0f, 0x28, 0x1f, 0x6c, 0x1f, 0x6c, 0x1e,
+   0xfe, 0x0e, 0xee, 0x06, 0xfe, 0x02, 0x00, 0x00 };
diff --git a/embedded/lib/Pictures/thermometer-warning.xbm b/embedded/lib/Pictures/thermometer-warning.xbm
new file mode 100644
index 0000000..70de2e1
--- /dev/null
+++ b/embedded/lib/Pictures/thermometer-warning.xbm
@@ -0,0 +1,6 @@
+#define thermometer_warning_width 16
+#define thermometer_warning_height 16
+static unsigned char thermometer_warning_bits[] = {
+   0x00, 0x00, 0x80, 0x01, 0x40, 0x02, 0xc0, 0x02, 0x40, 0x02, 0xc0, 0x02,
+   0x40, 0x02, 0x90, 0x02, 0x38, 0x02, 0x28, 0x04, 0x6c, 0x08, 0x6c, 0x0e,
+   0xfe, 0x0e, 0xee, 0x06, 0xfe, 0x02, 0x00, 0x00 };
diff --git a/embedded/lib/ServerHandler/ServerException.hpp b/embedded/lib/ServerHandler/ServerException.hpp
new file mode 100644
index 0000000..d9564a0
--- /dev/null
+++ b/embedded/lib/ServerHandler/ServerException.hpp
@@ -0,0 +1,22 @@
+#ifndef _HEADER_SERVER_EXCEPTION
+#define _HEADER_SERVER_EXCEPTION
+#include <Arduino.h>
+#include <exception>
+#include "ServerException.hpp"
+
+class ServerException : public std::exception
+{
+    public:
+        ServerException(const char* msg, uint8_t code)
+            : _msg(msg), _code(code)
+        {
+        }
+
+        uint8_t code() { return _code; }
+        const char* what() { return _msg; }
+    private:
+        const char* _msg;
+        uint8_t _code;
+};
+
+#endif // _HEADER_SERVER_EXCEPTION
\ No newline at end of file
diff --git a/embedded/lib/ServerHandler/ServerHandler.cpp b/embedded/lib/ServerHandler/ServerHandler.cpp
index 765a527..4fe00af 100644
--- a/embedded/lib/ServerHandler/ServerHandler.cpp
+++ b/embedded/lib/ServerHandler/ServerHandler.cpp
@@ -1,6 +1,15 @@
 #include "ServerHandler.hpp"
+
+#include "MainComponent.hpp"
 #include "../Display/Screen.hpp"
 
+inline void led_blink(LedComponent& led)
+{
+    led.setColor(LedNumber::LED_HARDWARE,LedColors::WIFI_ON);
+    delay(50);
+    led.setColor(LedNumber::LED_HARDWARE,LedColors::LED_OFF);
+}
+
 ServerHandler::ServerHandler() : server(80), display_time(0), _connected(false)
 {
 }
@@ -11,13 +20,17 @@ void ServerHandler::setup(const char *ssid, const char *password)
 { // On utilise les scope resolution operator pour définir les méthodes la classe ServerHandle qui elle est dans hpp
     uint8_t state(0);
     uint16_t tryConnection(0);
+    auto& led = MainComponent::GetInstance().getLed();
     Serial.begin(9600);
     WiFi.begin(ssid, password);
 
     // Testing connection
     while ((WiFi.status() != WL_CONNECTED) && (tryConnection < MAX_CONNECT_TRIES))
     {
-        delay(500);
+        led_blink(led);
+        delay(50);
+        led_blink(led);
+        delay(350);
         Display::Screen::GetInstance().connecting(state);
         state >= 3 ? state = 0 : state++;
         tryConnection++;
@@ -26,10 +39,15 @@ void ServerHandler::setup(const char *ssid, const char *password)
     if (tryConnection < MAX_CONNECT_TRIES)
     {
         _connected = true;
+        auto color = LedColors::WIFI_ON;
+        led.setColor(LedNumber::LED_HARDWARE,color-15,200);
         server.begin();
         server.on("/", [this]()
                 { this->handleRoot(); }); // fonction lamda pour gérer les requettes get
     }
+    else {
+        led.setColor(LedNumber::LED_HARDWARE,LedColors::NO_WIFI,200);
+    }
 }
 
 void ServerHandler::loop()
diff --git a/embedded/platformio.ini b/embedded/platformio.ini
index 1f38097..b4fe499 100644
--- a/embedded/platformio.ini
+++ b/embedded/platformio.ini
@@ -11,12 +11,15 @@
 [env:nodemcuv2]
 platform = espressif8266
 board = nodemcuv2
-build_flags = -fexceptions
+build_flags =
+	-std=c++11
 framework = arduino
 lib_deps = 
 	tzapu/WiFiManager@^0.16.0
 	bbx10/DNSServer@^1.1.0
 	ArduinoJson
 	olikraus/U8g2@^2.35.7
-extra_scripts =
-  pre:scripts/dotenv-var.py
\ No newline at end of file
+	seeed-studio/Grove - Chainable RGB LED@^1.0.0
+	adafruit/DHT sensor library@^1.4.6
+extra_scripts = 
+	pre:scripts/dotenv-var.py
diff --git a/embedded/src/main.cpp b/embedded/src/main.cpp
index 42de622..8ee2eac 100644
--- a/embedded/src/main.cpp
+++ b/embedded/src/main.cpp
@@ -3,47 +3,48 @@
 #include <ESP8266WebServer.h>
 
 #include "ServerHandler.hpp"
-#include "Component.hpp"
+#include "MainComponent.hpp"
 #include "Screen.hpp"
+#include "warning.hpp"
 
 #ifdef SSID_CLOVER
-    const char* ssid = SSID_CLOVER;
+const char *ssid = SSID_CLOVER;
 #endif
 #ifdef PSWD_CLOVER
-    const char* pswd = PSWD_CLOVER;
+const char *pswd = PSWD_CLOVER;
 #endif
 
-Component humidity(ComponentType::Analog, PIN_A0);
-
 void setup()
 {
+    // Sensors/Acuators setup
+    MainComponent::GetInstance().setup();
+
+    // Setup for screen and server
     Serial.begin(9600);
-    Display::Screen::GetInstance().Setup(const_cast<uint8_t*>(u8g2_font_busdisplay8x5_tr));
+    Display::Screen::GetInstance().Setup(const_cast<uint8_t *>(u8g2_font_busdisplay8x5_tr));
     ServerHandler::GetInstance().setup(ssid, pswd);
 
+    // Printing server data
     Serial.print("Connected to WiFi. IP address: ");
     Serial.println(WiFi.localIP());
-
-    pinMode(D5, OUTPUT);
-    digitalWrite(D5, LOW);
 }
 
 void loop()
 {
     // Creating variables to access singletons
-    auto& serverHandler = ServerHandler::GetInstance();
-    auto& dataHandler = DataHandler::GetInstance();
-    auto& screen = Display::Screen::GetInstance();
+    auto &serverHandler = ServerHandler::GetInstance();
+    auto &dataHandler = DataHandler::GetInstance();
+    auto &screen = Display::Screen::GetInstance();
 
     // Could not connect after setup: Showing screen failure
-    if(!serverHandler.isConnected())
+    if (!serverHandler.isConnected())
     {
         screen.notConnected();
         return;
     }
 
     // Server showing IP
-    if(!serverHandler.showBoot())
+    if (!serverHandler.showBoot())
     {
         serverHandler.showIp();
         delay(250);
@@ -51,7 +52,7 @@ void loop()
     }
 
     // When Screen can boot (isBooting) and Server finished showing IP (showBoot)
-    if(screen.isBooting() && serverHandler.showBoot())
+    if (screen.isBooting() && serverHandler.showBoot())
     {
         screen.boot();
         delay(100);
@@ -60,33 +61,19 @@ void loop()
 
     // Data gathered from various sensors
     // 0 -> air(0), 0-300 -> dry(20), 300-700 -> humid (580), 700-950 -> water(940)
-    auto soilHumidityData = static_cast<float>(std::any_cast<int>(humidity.getValue()));
-    auto airTemperatureData = random(150, 300) / 10.0;
-    auto airHumidityData = random(0, 1000) / 10.0;
-    auto lightData = random(0, 1000) / 10.0;
+    auto soilHumidityData = static_cast<float>(std::any_cast<int>(MainComponent::GetInstance().getHumidity().getValue()));
+    auto airTemperatureData = MainComponent::GetInstance().getDHT().getTemperature();
+    auto airHumidityData = MainComponent::GetInstance().getDHT().getHumidity();
 
     // Updating the data handler
     dataHandler.updateSoilMoistureData(soilHumidityData);
     dataHandler.updateAirTemperatureData(airTemperatureData);
     dataHandler.updateAirHumidityData(airHumidityData);
-    dataHandler.updateLightData(lightData);
 
-    // Screen showing
-    screen.loop(soilHumidityData,airTemperatureData,airHumidityData,lightData);
-    
-    if (soilHumidityData < 550) {
-        Serial.println("Soil humidity low. Please water the plant.");
-        digitalWrite(D5, HIGH);
-    } else if (soilHumidityData >= 550 && soilHumidityData <= 680) {
-        Serial.println("Idle...");
-        digitalWrite(D5, LOW);
-    } else {
-        Serial.println("Soil too wet.");
-        digitalWrite(D5, LOW);
-        delay(400);
-        digitalWrite(D5, HIGH);
-        delay(400);
-    }
+    // Showing screen
+    screen.loop((soilHumidityData / 950.0f) * 100.0f, airTemperatureData, airHumidityData);
+    Warning::warningLedLoop(soilHumidityData);
+    Warning::warningScreenLoop(soilHumidityData,airTemperatureData,airHumidityData);
 
     serverHandler.loop();
 }
\ No newline at end of file
diff --git a/embedded/src/warning.cpp b/embedded/src/warning.cpp
new file mode 100644
index 0000000..9186f1d
--- /dev/null
+++ b/embedded/src/warning.cpp
@@ -0,0 +1,52 @@
+#include "warning.hpp"
+
+#include "Screen.hpp"
+#include "MainComponent.hpp"
+
+using namespace Warning;
+
+LedMoistureStatus moisture_status(LedMoistureStatus::IDLE);
+
+void Warning::warningLedLoop(const float soilHumidity)
+{
+    auto& led = MainComponent::GetInstance().getLed();
+
+    if ((soilHumidity < MoistureLevel::DRY) && (moisture_status != LedMoistureStatus::DRY))
+    {
+        moisture_status = LedMoistureStatus::DRY;
+        led.setColor(LedNumber::LED_PLANT,LedColors::TOO_DRY,200);
+    }
+    else if (soilHumidity >= MoistureLevel::DRY && soilHumidity < MoistureLevel::HUMID)
+    {
+        led.setColor(LedNumber::LED_PLANT,LedColors::LED_OFF);
+        moisture_status = LedMoistureStatus::IDLE;
+    }
+    else if ((soilHumidity >= MoistureLevel::HUMID) && (moisture_status != LedMoistureStatus::WET))
+    {
+        moisture_status = LedMoistureStatus::WET;
+        led.setColor(LedNumber::LED_PLANT,LedColors::TOO_WET,200);
+    }
+}
+
+void Warning::warningScreenLoop(const float plantMoisture, const float airTemperature, const float airHumidity)
+{
+    auto& display = Display::Screen::GetInstance();
+
+    // Plant Moisture Warning
+    if(plantMoisture < MoistureLevel::DRY || plantMoisture > MoistureLevel::HUMID)
+        display.setWarningIcon(Display::Sensors::SOIL_MOISTURE);
+    else
+        display.setWarningIcon(Display::Sensors::SOIL_MOISTURE,false);
+
+    // Temperature Warning
+    if(airTemperature >= AIR_TEMPERATURE_TOO_HOT || airTemperature <= AIR_TEMPERATURE_TOO_COLD)
+        display.setWarningIcon(Display::Sensors::THERMOMETER);
+    else
+        display.setWarningIcon(Display::Sensors::THERMOMETER,false);
+
+    // Humidity Warning
+    if(airHumidity >= AIR_HUMIDITY_SATURATED)
+        display.setWarningIcon(Display::Sensors::AIR_HUMIDITY);
+    else
+        display.setWarningIcon(Display::Sensors::AIR_HUMIDITY,false);
+}
\ No newline at end of file
diff --git a/embedded/src/warning.hpp b/embedded/src/warning.hpp
new file mode 100644
index 0000000..8cb43c8
--- /dev/null
+++ b/embedded/src/warning.hpp
@@ -0,0 +1,33 @@
+#ifndef _HEADER_WARNING
+#define _HEADER_WARNING
+
+#include <stdint.h>
+
+namespace Warning {
+    /**
+     * @brief See the documentation on 'https://www.mouser.com/datasheet/2/744/Seeed_101020008-1217463.pdf'
+     */
+    namespace MoistureLevel {
+        constexpr uint16_t AIR = 0;
+        constexpr uint16_t DRY = 300;
+        constexpr uint16_t HUMID = 700;
+        constexpr uint16_t WATER = 950;
+    }
+    constexpr float AIR_HUMIDITY_SATURATED = 95.0f;
+    /**
+     * @brief Source : 'https://extension.umd.edu/resource/temperature-and-humidity-indoor-plants/'
+     */
+    constexpr float AIR_TEMPERATURE_TOO_HOT = 29.0f;
+    constexpr float AIR_TEMPERATURE_TOO_COLD = 14.0f;
+
+    enum class LedMoistureStatus {
+        IDLE,
+        DRY,
+        WET
+    };
+
+    void warningLedLoop(const float soilHumidity);
+    void warningScreenLoop(const float plantMoisture, const float airTemperature, const float airHumidity);
+}
+
+#endif // _HEADER_WARNING
\ No newline at end of file