diff --git a/AHT20_sensor_control/AHT20_sensor_wrapper.py b/AHT20_sensor_control/AHT20_sensor_wrapper.py
index d2cba50..47e2a5b 100644
--- a/AHT20_sensor_control/AHT20_sensor_wrapper.py
+++ b/AHT20_sensor_control/AHT20_sensor_wrapper.py
@@ -73,6 +73,8 @@ def triggerAndMeasureAndCRCcheck(AHT20_sensor):
         raise NotImplementedError("Should be a AHT20_wrapper")
     temperature, humidity = triggerAndMeasure(AHT20_sensor)
     CRCStatus = AHT20_sensor.CheckCRC()
+    if (CRCStatus == AHT20Status.AHT20_CRCNOTOK):
+        AHT20_logger.warning("CRC8 check fail")
     return temperature, humidity, CRCStatus
 
 
diff --git a/AHT20_sensor_control/__main__.py b/AHT20_sensor_control/__main__.py
index 510087d..c002fa5 100644
--- a/AHT20_sensor_control/__main__.py
+++ b/AHT20_sensor_control/__main__.py
@@ -40,7 +40,9 @@
                     temperature, humidity = triggerAndMeasure(my_wrapper)
                     mylogger.info("{0:.2f} C\t{1:.2f} %RH".format(temperature, humidity * 100))
                 else:
-                    temerature, humidity, CRC8_check = triggerAndMeasureAndCRCcheck(my_wrapper)
+                    CRC8_check = AHT20Status.AHT20_CRCNOTOK
+                    while (CRC8_check == AHT20Status.AHT20_CRCNOTOK):
+                        temerature, humidity, CRC8_check = triggerAndMeasureAndCRCcheck(my_wrapper)
                     mylogger.info("{0:.2f} C\t{1:.2f} %RH\t{2}".format(temperature, humidity * 100, str(CRC8_check)))
                 time.sleep(MEASURE_INTERVAL)
         except KeyboardInterrupt:
diff --git a/pyproject.toml b/pyproject.toml
index a5b841c..3442267 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "sensors-control-gpio-xzf8971"
-version = "1.2.0"
+version = "2.0.0"
 authors = [
   { name="Zifeng", email="zifeng.xu@foxmail.com" },
 ]