diff --git a/lib/SimuGaz/SimuGaz.cpp b/lib/SimuGaz/SimuGaz.cpp
index e30e990..1ef8c89 100644
--- a/lib/SimuGaz/SimuGaz.cpp
+++ b/lib/SimuGaz/SimuGaz.cpp
@@ -1,7 +1,7 @@
 #include <SimuGaz.h>
 
 #define INITIAL_CONSUMPTION 3451.02f
-#define INITIAL_SECONDS 0
+#define INITIAL_SECONDS 11462400  // date initiale = 13/05/2026 16:00
 #define AVERAGE_DAILY_CONSUMPTION 2.66f
 
 // Source : opendata.grdf.fr/explore/dataset/correction_climatique_grdf/
diff --git a/src/main.cpp b/src/main.cpp
index caf7619..5870002 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -72,7 +72,7 @@ void setup() {
 
 void loop() {
     uint8_t payload[4];
-    uint32_t pulses = simulateGasPulses(86400);
+    uint32_t pulses = simulateGasPulses(3600);
 
     displayGasIndex(pulses);
     
@@ -81,6 +81,5 @@ void loop() {
     
     Serial.flush();
 
-    delay(2000);
-    esp_deep_sleep(60000000);
+    esp_deep_sleep(3600000000);
 }
\ No newline at end of file