diff --git a/app/build.gradle b/app/build.gradle
index 48e8bd2c..d82ddccd 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -5,7 +5,7 @@ plugins {
 // 10,00,000 major-minor-build
 def AppMajorVersion = 1
 def AppMinorVersion = 1
-def AppBuildNumber = 17
+def AppBuildNumber = 19
 
 def AppVersionName = AppMajorVersion + "." + AppMinorVersion + "." + AppBuildNumber
 def AppVersionCode = AppMajorVersion * 100000 + AppMinorVersion * 1000 + AppBuildNumber
diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index b5a38e09..33499561 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -439,6 +439,7 @@ CPhoneDevice::CPhoneDevice(JavaVM* vm, jobject service, const std::string& appPa
     m_lastTime = 0;
     m_shouldStopWaiting = false;
     m_collecting = false;
+    localDelayTime = GetMicroTimeStamp();
 
     RegisterHandlerForSignal(SIGUSR2);
 
@@ -1838,6 +1839,16 @@ bool CPhoneDevice::TakePhoto(const IDevice::PHOTO_INFO& photoInfo, const vector<
 
 bool CPhoneDevice::OpenPTZSensors(int sec)
 {
+    unsigned long wid = RequestWakelock(0);
+    unsigned long long time_now = GetMicroTimeStamp();
+    if(time_now < localDelayTime-1000)
+    {
+        std::lock_guard<std::mutex> lock(m_cameraLocker);
+        m_sensorsStatus = true;
+        m_cameraStatus = true;
+        OpenSensors(MAIN_POWER_OPEN);
+        OpenSensors(CAMERA_SENSOR_OPEN);
+    }
     {
         std::lock_guard<std::mutex> lock(m_cameraLocker);
 //        std::unique_lock<std::mutex> lock(m_cameraLocker);
@@ -1879,6 +1890,7 @@ bool CPhoneDevice::OpenPTZSensors(int sec)
             m_cameraStatus = true;
         }
     }
+    ReleaseWakelock(wid);
 
     return m_cameraStatus;
 
@@ -1887,6 +1899,8 @@ bool CPhoneDevice::OpenPTZSensors(int sec)
 
 bool CPhoneDevice::ClosePTZSensors(uint32_t delayedCloseTime)
 {
+    localDelayTime = GetMicroTimeStamp() + delayedCloseTime*1000;
+
     if(m_sensorsStatus && !m_cameraStatus)
     {
         m_shouldStopWaiting.store(true);
diff --git a/app/src/main/cpp/PhoneDevice.h b/app/src/main/cpp/PhoneDevice.h
index 02883e40..1ed11fa3 100644
--- a/app/src/main/cpp/PhoneDevice.h
+++ b/app/src/main/cpp/PhoneDevice.h
@@ -405,6 +405,7 @@ protected:
     mutable std::mutex m_collectDataLocker;
 	std::condition_variable m_CollectDatacv;
 	std::atomic<bool> m_collecting;
+	unsigned long long localDelayTime;
 
 };