diff --git a/app/src/main/java/com/example/medilightv2android/ble/BleManager.kt b/app/src/main/java/com/example/medilightv2android/ble/BleManager.kt
index 4c3fa8f..0ce9a43 100644
--- a/app/src/main/java/com/example/medilightv2android/ble/BleManager.kt
+++ b/app/src/main/java/com/example/medilightv2android/ble/BleManager.kt
@@ -358,13 +358,13 @@ class BleManager private constructor(private val context: Context) {
     }
 
     fun sendImuQuery() {
-        sendRaw(CRC16.buildCommand("msp"))
+        sendRaw(CRC16.buildCommandASCII("msp", " "))
     }
 
     /** 전체 측정: 배터리+IMU+온도+6ch piezo (rbb→reb×6→raa) */
     fun sendFullMeasurement() {
         piezoCollector.startMultiChannel(6)
-        sendRaw(CRC16.buildCommand("mbb"))
+        sendRaw(CRC16.buildCommandASCII("mbb", " "))
     }
 
     /** 6채널 측정만 (maa, rbb 헤더 없이 바로 reb×6→raa) */
diff --git a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
index ef1416a..1c3622c 100644
--- a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
+++ b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
@@ -238,8 +238,10 @@ fun PiezoMonitoringView(appState: AppState) {
                 if (autoTickCount % 10 == 0) {
                     // 10초째: 6ch 측정
                     if (!isMeasuring) measure()
+                } else {
+                    // 1~9초: IMU 쿼리
+                    if (!isMeasuring) bleManager.sendImuQuery()
                 }
-                // IMU는 지원하는 기기에서만 (rxs: 응답 시 자동 비활성화)
             }
         }
     }