diff --git a/Arduino/PS_BLE_ShotDetection/PS_BLE_ShotDetection.ino b/Arduino/PS_BLE_ShotDetection/PS_BLE_ShotDetection.ino
index c5d929e..943ac46 100644
--- a/Arduino/PS_BLE_ShotDetection/PS_BLE_ShotDetection.ino
+++ b/Arduino/PS_BLE_ShotDetection/PS_BLE_ShotDetection.ino
@@ -574,8 +574,9 @@ void loop() {
   sendDebugData(accelMag, gyroMag, audioLevel);
   printDebugSerial(accelMag, gyroMag, audioLevel);
 
-  // ─── IMU BLE 10 Hz ───
-  if (now-lastSend>=100) {
+  // ─── IMU BLE 10 Hz (debug uniquement) ───
+  // En production (debugMode OFF), pas d'envoi IMU → charge BLE réduite pour Unreal
+  if (debugMode != DEBUG_OFF && now-lastSend>=100) {
     lastSend=now;
     float dt=(now-lastUpdate)/1000.0f; lastUpdate=now;
     roll+=gx*dt; pitch+=gy*dt; yaw+=gz*dt;