diff --git a/lib/SimuGaz/SimuGaz.cpp b/lib/SimuGaz/SimuGaz.cpp
index 22880d2..36e698f 100644
--- a/lib/SimuGaz/SimuGaz.cpp
+++ b/lib/SimuGaz/SimuGaz.cpp
@@ -1,4 +1,5 @@
 #include <SimuGaz.h>
+#include <Preferences.h>
 
 #define INITIAL_CONSUMPTION 1594.87f
 #define INITIAL_SECONDS 11462400  // date initiale = 13/05/2026 16:00
@@ -21,15 +22,32 @@ static const float GRDF_MONTHLY_COEFF[12] = {
     2.11f, // Décembre
 };
 
+Preferences prefs;
+
 // Base annuelle : 972 m³/an pour 100m² (CRE)
 // - base mensuelle moyenne = 81 m³/mois
 // - base journalière moyenne = 2.66 m³/j
 
-RTC_DATA_ATTR float consumptionM3 = INITIAL_CONSUMPTION;
-RTC_DATA_ATTR uint32_t totalSeconds = INITIAL_SECONDS;
+float consumptionM3;
+uint32_t totalSeconds;
+
+void get_stored_values(){
+    prefs.begin("simugaz");
+    consumptionM3 = prefs.getFloat("consumption_m3", INITIAL_CONSUMPTION);
+    totalSeconds = prefs.getUInt("seconds", INITIAL_SECONDS);
+    prefs.end();
+}
+
+void store_values(){
+    prefs.begin("simugaz");
+    prefs.putFloat("consumption_m3", consumptionM3);
+    prefs.putUInt("seconds", totalSeconds);
+    prefs.end();
+}
 
 uint32_t simulateGasPulses(uint32_t intervalSeconds)
 {
+    get_stored_values();
     totalSeconds += intervalSeconds;
 
     uint32_t month = (totalSeconds / (86400UL * 30UL)) % 12;
@@ -45,6 +63,8 @@ uint32_t simulateGasPulses(uint32_t intervalSeconds)
     uint32_t pulseCount = (uint32_t)(consumptionM3 / 0.010f);
     uint32_t incrementPulses = (uint32_t)(incrementM3 / 0.010f);
     
+    store_values();
+    
     Serial.printf("[GAZ] Incrément de %lu impulsions - Total : %lu impulsions (%.3f m³)\n", incrementPulses, pulseCount, pulseCount * 0.010f);
     return pulseCount;
 }
\ No newline at end of file
diff --git a/lib/SimuGaz/SimuGaz.h b/lib/SimuGaz/SimuGaz.h
index c183478..a7ca631 100644
--- a/lib/SimuGaz/SimuGaz.h
+++ b/lib/SimuGaz/SimuGaz.h
@@ -2,4 +2,6 @@
 
 #include <Arduino.h>
 
-uint32_t simulateGasPulses(uint32_t intervalSeconds = 86400);
\ No newline at end of file
+uint32_t simulateGasPulses(uint32_t intervalSeconds = 86400);
+void get_stored_values();
+void store_values();
\ No newline at end of file