diff --git a/DopplerSignal/DopplerSignal.ino b/DopplerSignal/DopplerSignal.ino
index 356288e..b392519 100644
--- a/DopplerSignal/DopplerSignal.ino
+++ b/DopplerSignal/DopplerSignal.ino
@@ -2,29 +2,45 @@
 
 const int DOPPLER_0_PIN = A0;
 const int DOPPLER_1_PIN = A1;
-const int MEAN_SIZE = 10;
+// const int MEAN_SIZE = 10;
 int gDoppler0 = 0;  // value read from the doppler 0
 int gDoppler1 = 0;  // value read from the doppler 1
-int gSum0 = 0;
-int gSum1 = 0;
+// int gSum0 = 0;
+// int gSum1 = 0;
+struct repeating_timer st_timer;
+
+/* タイマー割り込み処理 */
+bool Timer(struct repeating_timer *t) {
+  gDoppler0 = analogRead(DOPPLER_0_PIN);
+  gDoppler1 = analogRead(DOPPLER_1_PIN);
+
+  Serial.print(millis());
+  Serial.print(",");
+  Serial.print(gDoppler0);
+  Serial.print(",");
+  Serial.println(gDoppler1);
+
+  return true;
+}
 
 void setup() {
   Serial.begin(115200);
+  add_repeating_timer_us(-10000, Timer, NULL, &st_timer);
 }
 
 void loop() {
-  gSum0 = 0;
-  gSum1 = 0;
-  for (int i = 0; i < MEAN_SIZE; i++){
-    gDoppler0 = analogRead(DOPPLER_0_PIN);
-    gDoppler1 = analogRead(DOPPLER_1_PIN);
-    gSum0 += gDoppler0;
-    gSum1 += gDoppler1;
-    delay(1);
-  }
+  // gSum0 = 0;
+  // gSum1 = 0;
+  // for (int i = 0; i < MEAN_SIZE; i++){
+  //   gDoppler0 = analogRead(DOPPLER_0_PIN);
+  //   gDoppler1 = analogRead(DOPPLER_1_PIN);
+  //   gSum0 += gDoppler0;
+  //   gSum1 += gDoppler1;
+  //   delay(1);
+  // }
 
-  // print the results to the Serial Monitor:
-  Serial.print((float)gSum0 / MEAN_SIZE);
-  Serial.print(",");
-  Serial.println((float)gSum1 / MEAN_SIZE);
+  // // print the results to the Serial Monitor:
+  // Serial.print((float)gSum0 / MEAN_SIZE);
+  // Serial.print(",");
+  // Serial.println((float)gSum1 / MEAN_SIZE);
 }
diff --git a/measurement.py b/measurement.py
index ae84053..ca7162a 100644
--- a/measurement.py
+++ b/measurement.py
@@ -86,7 +86,7 @@
     def __init__(self, out_filename, port):
         super().__init__(out_filename)
         self._serial = serial.Serial(port, 115200, timeout=1)
-        self._cols = 3
+        self._cols = 4
         print("Seiral port connected on ", port)
 
     def preprocess(self):
@@ -95,13 +95,13 @@
 
     def read(self):
         if not self._serial.is_open:
-            return [0, 0]
+            return [0, 0, 0]
         line = self._serial.readline()
         if not line:
-            return [0, 0]
+            return [0, 0, 0]
         line2 = line.decode("utf-8").strip()
         if line2 == "":
-            return [0, 0]
+            return [0, 0, 0]
         return [float(_) for _ in line2.split(",")]
 
     def postprocess(self):
@@ -123,7 +123,7 @@
 
     # Wait for stop
     print("measurement start.")
-    recode_dulation = 15  # sec
+    recode_dulation = 3  # sec
     for i in range(recode_dulation):
         time.sleep(1)
         print(i + 1, "/", recode_dulation, "sec")
@@ -155,7 +155,7 @@
         combind,
         delimiter=",",
         fmt="%.3f",
-        header="time(s),IF-I,IF-Q,RespBelt",
+        header="time(s),device time(ms),IF-I,IF-Q,RespBelt",
     )
     print("Recoding data was saved to ", filename)
     # print(combind)