diff --git a/libs/cloud/picloudclient.cpp b/libs/cloud/picloudclient.cpp
index df32160d..db0729c1 100644
--- a/libs/cloud/picloudclient.cpp
+++ b/libs/cloud/picloudclient.cpp
@@ -45,10 +45,7 @@ PICloudClient::PICloudClient(const PIString & path, PIIODevice::DeviceMode mode)
 
 PICloudClient::~PICloudClient() {
 	//piCoutObj << "~PICloudClient()";
-	//softStopThreadedRead();
-	//eth.close();
-	//if (is_connected) disconnected();
-	//close();
+
 	stopAndWait();
 	//piCoutObj << "~PICloudClient() closed";
 	internalDisconnect();
@@ -71,7 +68,8 @@ void PICloudClient::setKeepConnection(bool on) {
 
 
 void PICloudClient::interrupt() {
-	eth.interrupt();
+	cond_buff.notifyOne();
+	cond_connect.notifyOne();
 }
 
 
@@ -87,7 +85,7 @@ bool PICloudClient::openDevice() {
 		mutex_connect.unlock();
 		if (!conn_ok) {
 			mutex_connect.lock();
-			eth.stop();
+			eth.stopAndWait();
 			eth.close();
 			mutex_connect.unlock();
 		}
@@ -104,7 +102,7 @@ bool PICloudClient::closeDevice() {
 	if (is_connected) {
 		internalDisconnect();
 	}
-	eth.stop();
+	eth.stopAndWait();
 	eth.close();
 	return true;
 }
@@ -116,11 +114,15 @@ ssize_t PICloudClient::readDevice(void * read_to, ssize_t max_size) {
 	if (!is_connected && eth.isClosed()) openDevice();
 	ssize_t sz = -1;
 	mutex_buff.lock();
-	cond_buff.wait(mutex_buff, [this](){return !buff.isEmpty() || !is_connected;});
+	cond_buff.wait(mutex_buff);
 	if (is_connected) {
-		sz = piMini(max_size, buff.size());
-		memcpy(read_to, buff.data(), sz);
-		buff.remove(0, sz);
+		if (buff.isEmpty()) {
+			sz = 0;
+		} else {
+			sz = piMini(max_size, buff.size());
+			memcpy(read_to, buff.data(), sz);
+			buff.remove(0, sz);
+		}
 	}
 	mutex_buff.unlock();
 	if (!is_connected) opened_ = false;
@@ -136,11 +138,6 @@ ssize_t PICloudClient::writeDevice(const void * data, ssize_t size) {
 }
 
 
-void PICloudClient::stopThreadedReadDevice() {
-	cond_buff.notifyOne();
-}
-
-
 void PICloudClient::internalDisconnect() {
 	is_connected = false;
 	cond_buff.notifyOne();
diff --git a/libs/cloud/picloudserver.cpp b/libs/cloud/picloudserver.cpp
index 931038bc..c968bff1 100644
--- a/libs/cloud/picloudserver.cpp
+++ b/libs/cloud/picloudserver.cpp
@@ -102,11 +102,6 @@ ssize_t PICloudServer::writeDevice(const void * data, ssize_t max_size) {
 }
 
 
-void PICloudServer::stopThreadedReadDevice() {
-
-}
-
-
 void PICloudServer::interrupt() {
 	eth.interrupt();
 }
@@ -159,11 +154,15 @@ ssize_t PICloudServer::Client::readDevice(void * read_to, ssize_t max_size) {
 	if (!is_connected) return -1;
 	ssize_t sz = -1;
 	mutex_buff.lock();
-	cond_buff.wait(mutex_buff, [this](){return !buff.isEmpty() || !is_connected;});
+	cond_buff.wait(mutex_buff);
 	if (is_connected) {
-		sz = piMini(max_size, buff.size());
-		memcpy(read_to, buff.data(), sz);
-		buff.remove(0, sz);
+		if (buff.isEmpty()) {
+			sz = 0;
+		} else {
+			sz = piMini(max_size, buff.size());
+			memcpy(read_to, buff.data(), sz);
+			buff.remove(0, sz);
+		}
 	}
 	mutex_buff.unlock();
 	return sz;
diff --git a/libs/main/cloud/picloudclient.h b/libs/main/cloud/picloudclient.h
index 4fb58d9b..e9217dd3 100644
--- a/libs/main/cloud/picloudclient.h
+++ b/libs/main/cloud/picloudclient.h
@@ -54,7 +54,6 @@ protected:
 	ssize_t readDevice(void * read_to, ssize_t max_size) override;
 	ssize_t writeDevice(const void * data, ssize_t size) override;
 	DeviceInfoFlags deviceInfoFlags() const override {return PIIODevice::Reliable;}
-	void stopThreadedReadDevice() override;
 
 private:
 	EVENT_HANDLER1(void, _readed, PIByteArray &, data);
diff --git a/libs/main/cloud/picloudserver.h b/libs/main/cloud/picloudserver.h
index 4f8d110d..a0fca4bd 100644
--- a/libs/main/cloud/picloudserver.h
+++ b/libs/main/cloud/picloudserver.h
@@ -74,7 +74,6 @@ protected:
 	bool closeDevice() override;
 	ssize_t readDevice(void * read_to, ssize_t max_size) override;
 	ssize_t writeDevice(const void * data, ssize_t max_size) override;
-	void stopThreadedReadDevice() override;
 	void interrupt() override;
 
 private:
diff --git a/libs/main/core/piwaitevent_p.cpp b/libs/main/core/piwaitevent_p.cpp
index f4a832dc..d576ba31 100644
--- a/libs/main/core/piwaitevent_p.cpp
+++ b/libs/main/core/piwaitevent_p.cpp
@@ -45,7 +45,7 @@ void PIWaitEvent::create() {
 		piCout << "Error with CreateEventA:" << errorString();
 	}
 #else
-	for (int i = 0; i < 3; ++i) memset(&(fds[i]), 0, sizeof(fds[i]));
+	for (int i = 0; i < sizeof(fds); ++i) memset(&(fds[i]), 0, sizeof(fds[i]));
 	if (::pipe(pipe_fd) < 0) {
 		piCout << "Error with pipe:" << errorString();
 	} else {
@@ -62,7 +62,7 @@ void PIWaitEvent::destroy() {
 		event = NULL;
 	}
 #else
-	for (int i = 0; i < 2; ++i) {
+	for (int i = 0; i < sizeof(pipe_fd); ++i) {
 		if (pipe_fd[i] != 0) {
 			::close(pipe_fd[i]);
 			pipe_fd[i] = 0;
@@ -72,35 +72,24 @@ void PIWaitEvent::destroy() {
 }
 
 
-#ifdef WINDOWS
-bool PIWaitEvent::wait() {
-#else
-bool PIWaitEvent::wait(int fd, PIWaitEvent::SelectRole role) {
-#endif
+bool PIWaitEvent::wait(int fd, CheckRole role) {
 	if (!isCreate()) return false;
 #ifdef WINDOWS
 	DWORD ret = WaitForSingleObjectEx(event, INFINITE, TRUE);
 	ResetEvent(event);
 	if (ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED) return false;
 #else
+	if (fd == -1) return false;
 	int nfds = piMaxi(pipe_fd[ReadEnd], fd) + 1;
-	int fd_index = 0;
-	switch (role) {
-	case CheckRead:
-		fd_index = 0;
-		break;
-	case CheckWrite:
-		fd_index = 1;
-		break;
-	}
-	for (int i = 0; i < 3; ++i) FD_ZERO(&(fds[i]));
-	FD_SET(pipe_fd[ReadEnd], &(fds[0]));
-	FD_SET(fd, &(fds[2]));
-	FD_SET(fd, &(fds[fd_index]));
-	::select(nfds, &(fds[0]), &(fds[1]), &(fds[2]), nullptr);
+	int fd_index = role;
+	for (int i = 0; i < sizeof(fds); ++i) FD_ZERO(&(fds[i]));
+	FD_SET(pipe_fd[ReadEnd], &(fds[CheckRead]));
+	FD_SET(fd, &(fds[CheckExeption]));
+	if (fd_index != CheckExeption) FD_SET(fd, &(fds[fd_index]));
+	::select(nfds, &(fds[CheckRead]), &(fds[CheckWrite]), &(fds[CheckExeption]), nullptr);
 	int buf = 0;
 	while (::read(pipe_fd[ReadEnd], &buf, sizeof(buf)) > 0);
-	if (FD_ISSET(fd, &(fds[2]))) return false;
+	if (FD_ISSET(fd, &(fds[CheckExeption]))) return false;
 	return FD_ISSET(fd, &(fds[fd_index]));
 #endif
 	return true;
@@ -124,3 +113,8 @@ bool PIWaitEvent::isCreate() const {
 	return pipe_fd[ReadEnd] != 0;
 #endif
 }
+
+
+void * PIWaitEvent::getEvent() const {
+	return event;
+}
diff --git a/libs/main/core/piwaitevent_p.h b/libs/main/core/piwaitevent_p.h
index e5c7ee73..e0f18299 100644
--- a/libs/main/core/piwaitevent_p.h
+++ b/libs/main/core/piwaitevent_p.h
@@ -37,22 +37,23 @@ public:
 
 	void create();
 	void destroy();
-#ifdef WINDOWS
-	bool wait();
-#else
-	enum SelectRole {
+
+	enum CheckRole { // UNIX only
 		CheckRead,
-		CheckWrite
+		CheckWrite,
+		CheckExeption
 	};
-	bool wait(int fd, SelectRole role = CheckRead);
-#endif
+	bool wait(int fd = -1, CheckRole role = CheckRead);
+
 	void interrupt();
 	bool isCreate() const;
 
-#ifdef WINDOWS
-	HANDLE event = NULL;
-#else
+	void * getEvent() const; // WINDOWS only
+
 private:
+#ifdef WINDOWS
+	void * event = nullptr;
+#else
 	int pipe_fd[2] = {0, 0};
 	fd_set fds[3];
 	enum {
diff --git a/libs/main/io_devices/piethernet.cpp b/libs/main/io_devices/piethernet.cpp
index 18d0f4e2..8106921e 100644
--- a/libs/main/io_devices/piethernet.cpp
+++ b/libs/main/io_devices/piethernet.cpp
@@ -977,14 +977,14 @@ bool PIEthernet::connectTCP() {
 #ifdef WINDOWS
 long PIEthernet::waitForEvent(long mask) {
 	if (!PRIVATE->event.isCreate() || sock < 0) return 0;
-	WSAEventSelect(sock, PRIVATE->event.event, mask);
+	WSAEventSelect(sock, PRIVATE->event.getEvent(), mask);
 	if (PRIVATE->event.wait()) {
 	//DWORD wr = WSAWaitForMultipleEvents(1, &(PRIVATE->read_event), FALSE, WSA_INFINITE, TRUE);
 	//piCout << "wait result" << wr;
 	//if (wr == WSA_WAIT_EVENT_0) {
 		WSANETWORKEVENTS events;
 		memset(&events, 0, sizeof(events));
-		WSAEnumNetworkEvents(sock, PRIVATE->event.event, &events);
+		WSAEnumNetworkEvents(sock, PRIVATE->event.getEvent(), &events);
 		//piCout << "wait result" << events.lNetworkEvents;
 		return events.lNetworkEvents;
 	}
diff --git a/libs/main/io_devices/pifile.cpp b/libs/main/io_devices/pifile.cpp
index 69bd4c44..20dae7c3 100644
--- a/libs/main/io_devices/pifile.cpp
+++ b/libs/main/io_devices/pifile.cpp
@@ -439,9 +439,7 @@ PIByteArray PIFile::get() {
 
 ssize_t PIFile::readDevice(void * read_to, ssize_t max_size) {
 	if (!canRead() || PRIVATE->fd == 0) return -1;
-	reading_now = true;
 	ssize_t ret = fread(read_to, 1, max_size, PRIVATE->fd);
-	reading_now = false;
 	return ret;
 }
 
diff --git a/libs/main/io_devices/piiodevice.cpp b/libs/main/io_devices/piiodevice.cpp
index 90c4d95b..bbcfc092 100644
--- a/libs/main/io_devices/piiodevice.cpp
+++ b/libs/main/io_devices/piiodevice.cpp
@@ -217,11 +217,8 @@ void PIIODevice::stopThreadedRead() {
 	read_thread.stop();
 	if (!destroying) {
 		interrupt();
-		stopThreadedReadDevice();
-	}
-	if (reading_now) {
-		read_thread.terminate();
-		reading_now = false;
+	} else {
+		piCoutObj << "Error: Device is running after destructor!";
 	}
 #endif
 }
@@ -307,7 +304,6 @@ ssize_t PIIODevice::write(const void * data, ssize_t max_size) {
 
 
 void PIIODevice::_init() {
-	reading_now = false;
 	setOptions(0);
 	setReopenEnabled(true);
 	setReopenTimeout(1000);
diff --git a/libs/main/io_devices/piiodevice.h b/libs/main/io_devices/piiodevice.h
index 3bd8f3b9..2ce101ef 100644
--- a/libs/main/io_devices/piiodevice.h
+++ b/libs/main/io_devices/piiodevice.h
@@ -498,10 +498,6 @@ protected:
 	//! \~english Function executed when thread read some data, default implementation execute external callback "ret_func_"
 	//! \~russian Метод вызывается после каждого успешного потокового чтения, по умолчанию вызывает callback "ret_func_"
 	virtual bool threadedRead(const uchar * readed, ssize_t size);
-
-	//! \~english Function executed after PIThread::stop() and PIThread::interrupt() of read thread
-	//! \~russian Метод вызывается после PIThread::stop() и PIThread::interrupt() потока чтения
-	virtual void stopThreadedReadDevice() {}
 	
 	//! \~english Reimplement to construct full unambiguous string, describes this device.
 	//! Default implementation returns \a path()
@@ -549,10 +545,6 @@ protected:
 	bool opened_ = false;
 	void * ret_data_ = nullptr;
 
-	//! \~english Set this flag while blocking operations
-	//! \~russian Устанавливайте этот флаг во время блокирующих операций
-	std::atomic_bool reading_now;
-
 private:
 	EVENT_HANDLER(void, read_func);
 	EVENT_HANDLER(void, write_func);
diff --git a/libs/main/io_devices/piserial.cpp b/libs/main/io_devices/piserial.cpp
index a9437a73..b7590f7e 100644
--- a/libs/main/io_devices/piserial.cpp
+++ b/libs/main/io_devices/piserial.cpp
@@ -814,7 +814,7 @@ ssize_t PISerial::readDevice(void * read_to, ssize_t max_size) {
 		if (sending) return -1;
 		//piCoutObj << "read ..." << PRIVATE->hCom;
 		memset(&(PRIVATE->overlap), 0, sizeof(PRIVATE->overlap));
-		PRIVATE->overlap.hEvent = PRIVATE->event.event;
+		PRIVATE->overlap.hEvent = PRIVATE->event.getEvent();
 		ReadFile(PRIVATE->hCom, read_to, max_size, NULL, &(PRIVATE->overlap));
 		PRIVATE->readed = 0;
 		if (PRIVATE->event.wait()) {
@@ -860,7 +860,7 @@ ssize_t PISerial::writeDevice(const void * data, ssize_t max_size) {
 	//piCoutObj << "send ..." << max_size;// << ": " << PIString((char*)data, max_size);
 	sending = true;
 	memset(&(PRIVATE->overlap_write), 0, sizeof(PRIVATE->overlap_write));
-	PRIVATE->overlap_write.hEvent = PRIVATE->event_write.event;
+	PRIVATE->overlap_write.hEvent = PRIVATE->event_write.getEvent();
 	WriteFile(PRIVATE->hCom, data, max_size, NULL, &(PRIVATE->overlap_write));
 	if (PRIVATE->event_write.wait()) {
 		GetOverlappedResult(PRIVATE->hCom, &(PRIVATE->overlap_write), &wrote, FALSE);