diff --git a/ISCamRecorder/MainForm.cs b/ISCamRecorder/MainForm.cs
index 56ce675..65f1bb6 100644
--- a/ISCamRecorder/MainForm.cs
+++ b/ISCamRecorder/MainForm.cs
@@ -139,7 +139,8 @@
         /// シリアル通信スレッド
         /// </summary>
         private void SerialThread() {
-            if (!_Sensor.Connect()) return;
+            //if (!_Sensor.Connect()) return;
+            _Sensor.Connect();
             _Sensor.Loop();
         }
 
diff --git a/ISCamRecorder/SensorData.cs b/ISCamRecorder/SensorData.cs
index c1ff9af..14aeca3 100644
--- a/ISCamRecorder/SensorData.cs
+++ b/ISCamRecorder/SensorData.cs
@@ -2,7 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
-using System.Threading.Tasks;
+using System.Threading;
 using System.IO.Ports;
 using System.Management;
 using System.Diagnostics;
@@ -90,10 +90,16 @@
             while (_MF.State != STATE.Exit) {
 
                 // データ受信
-                var str = _Serial.ReadLine();
-                var strs = str.Split(',');
-                if (strs.Length < 5) continue;
-                var values = strs.Select(s => int.Parse(s)).ToArray();
+                var values = new int[] { 60, 80, 100, 20, 0 };
+                if (_Serial != null) {
+                    var str = _Serial.ReadLine();
+                    var strs = str.Split(',');
+                    if (strs.Length >= 4) {
+                        values = strs.Select(s => int.Parse(s)).ToArray();
+                    }
+                } else {
+                    Thread.Sleep(50);
+                }
 
                 // ボタン状態
                 var buttonState = (1 - values[4]);