diff --git a/lib/GazDisplay/GazDisplay.cpp b/lib/GazDisplay/GazDisplay.cpp
new file mode 100644
index 0000000..0728d3e
--- /dev/null
+++ b/lib/GazDisplay/GazDisplay.cpp
@@ -0,0 +1,57 @@
+#include "GazDisplay.h"
+
+Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RST);
+
+DisplayError displayInit()
+{
+    if (OLED_RST >= 0)
+    {
+        pinMode(OLED_RST, OUTPUT);
+        digitalWrite(OLED_RST, LOW);
+        delay(20);
+        digitalWrite(OLED_RST, HIGH);
+    }
+    Wire.begin(OLED_SDA, OLED_SCL);
+
+    if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C))
+    {
+        Serial.println("[OLED] Ecran non détecté !");
+        return DisplayError::INIT_FAILED;
+    }
+    display.clearDisplay();
+    display.display();
+    
+    return DisplayError::OK;
+}
+
+void displayGasIndex(uint32_t pulses)
+{
+    float indexM3 = pulses * 0.010f;
+
+    display.clearDisplay();
+
+    // Titre
+    display.setTextSize(1);
+    display.setTextColor(SSD1306_WHITE);
+    display.setCursor(0, 0);
+    display.println("Index gaz");
+
+    // Ligne
+    display.drawLine(0, 10, 128, 10, SSD1306_WHITE);
+
+    // Valeur en grand
+    display.setTextSize(2);
+    display.setCursor(0, 18);
+    display.printf("%.3f", indexM3);
+
+    // Unité
+    display.setTextSize(1);
+    display.setCursor(112, 25);
+    display.println("m3");
+
+    // Impulsions en petit
+    display.setCursor(0, 54);
+    display.printf("Impulsions : %lu", pulses);
+
+    display.display();
+}
\ No newline at end of file
diff --git a/lib/GazDisplay/GazDisplay.h b/lib/GazDisplay/GazDisplay.h
new file mode 100644
index 0000000..3b757fc
--- /dev/null
+++ b/lib/GazDisplay/GazDisplay.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <Wire.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+
+#define OLED_SDA 21
+#define OLED_SCL 22
+#define OLED_RST -1
+
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 64
+
+enum class DisplayError : int16_t {
+    OK           =  0,
+    INIT_FAILED  = -1
+};
+
+DisplayError displayInit();
+void displayGasIndex(uint32_t pulses);
+