diff --git a/libs/cloud/picloudserver.cpp b/libs/cloud/picloudserver.cpp
index 62e51410..00f917be 100644
--- a/libs/cloud/picloudserver.cpp
+++ b/libs/cloud/picloudserver.cpp
@@ -25,7 +25,8 @@ PICloudServer::PICloudServer(const PIString & path, PIIODevice::DeviceMode mode)
 
 
 PICloudServer::~PICloudServer() {
-
+	stop();
+	close();
 }
 
 
diff --git a/libs/main/io_devices/pibinarylog.cpp b/libs/main/io_devices/pibinarylog.cpp
index bae32580..8bef86c5 100644
--- a/libs/main/io_devices/pibinarylog.cpp
+++ b/libs/main/io_devices/pibinarylog.cpp
@@ -78,6 +78,12 @@ PIBinaryLog::PIBinaryLog() {
 }
 
 
+PIBinaryLog::~PIBinaryLog() {
+	stop();
+	close();
+}
+
+
 bool PIBinaryLog::openDevice() {
 	lastrecord.timestamp = PISystemTime();
 	lastrecord.id = 0;
diff --git a/libs/main/io_devices/pibinarylog.h b/libs/main/io_devices/pibinarylog.h
index 9a835c4b..fb674700 100644
--- a/libs/main/io_devices/pibinarylog.h
+++ b/libs/main/io_devices/pibinarylog.h
@@ -31,7 +31,7 @@ class PIP_EXPORT PIBinaryLog: public PIIODevice
 	PIIODEVICE(PIBinaryLog)
 public:
 	explicit PIBinaryLog();
-	~PIBinaryLog() {closeDevice();}
+	virtual ~PIBinaryLog();
 
 	//! \brief Play modes for \a PIBinaryLog
 	enum PlayMode {
diff --git a/libs/main/io_devices/pican.cpp b/libs/main/io_devices/pican.cpp
index f3201f09..0d0443c3 100644
--- a/libs/main/io_devices/pican.cpp
+++ b/libs/main/io_devices/pican.cpp
@@ -46,6 +46,12 @@ PICAN::PICAN(const PIString & path, PIIODevice::DeviceMode mode) : PIIODevice(pa
 }
 
 
+PICAN::~PICAN() {
+	stop();
+	close();
+}
+
+
 bool PICAN::openDevice() {
 #ifdef PIP_CAN
 	piCout << "PICAN open device" << path();
diff --git a/libs/main/io_devices/pican.h b/libs/main/io_devices/pican.h
index 51a6689a..11f2bb06 100644
--- a/libs/main/io_devices/pican.h
+++ b/libs/main/io_devices/pican.h
@@ -31,7 +31,7 @@ class PIP_EXPORT PICAN: public PIIODevice
 	PIIODEVICE(PICAN)
 public:
 	explicit PICAN(const PIString & path = PIString(), PIIODevice::DeviceMode mode = PIIODevice::ReadWrite);
-	~PICAN() {}
+	virtual ~PICAN();
 
 	void setCANID(int id);
 	int CANID() const;
diff --git a/libs/main/io_devices/piethernet.cpp b/libs/main/io_devices/piethernet.cpp
index d0a0de20..3915425b 100644
--- a/libs/main/io_devices/piethernet.cpp
+++ b/libs/main/io_devices/piethernet.cpp
@@ -244,7 +244,7 @@ PIEthernet::PIEthernet(int sock_, PIString ip_port): PIIODevice("", ReadWrite) {
 PIEthernet::~PIEthernet() {
 	//piCout << "~PIEthernet" << uint(this);
 	stop();
-	closeDevice();
+	close();
 	//piCoutObj << "~PIEthernet done";
 }
 
@@ -566,7 +566,6 @@ bool PIEthernet::connect(bool threaded) {
 	connected_ = (::connect(sock, (sockaddr * )&PRIVATE->addr_, sizeof(PRIVATE->addr_)) == 0);
 	if (!connected_) {
 		piCoutObj << "Can`t connect to" << addr_r << "," << ethErrorString();
-		closeSocket(sock);
 	}
 	opened_ = connected_;
 	if (connected_) {
@@ -663,9 +662,8 @@ int PIEthernet::readDevice(void * read_to, int max_size) {
 			//piCoutObj << "connect to " << ip_ << ":" << port_ << "...";
 			connected_ = (::connect(sock, (sockaddr * )&(PRIVATE->addr_), sizeof(PRIVATE->addr_)) == 0);
 			//piCoutObj << "connect to " << ip_ << ":" << port_ << connected_;
-			if (!connected_) {
+			if (!connected_)
 				piCoutObj << "Can`t connect to" << addr_r << "," << ethErrorString();
-			}
 			opened_ = connected_;
 			if (connected_) {
 				connecting_ = false;
@@ -674,10 +672,7 @@ int PIEthernet::readDevice(void * read_to, int max_size) {
 				piMSleep(10);
 			//piCout << "connected to" << path();
 		}
-		if (!connected_) {
-			closeSocket(sock);
-			return -1;
-		}
+		if (!connected_) return -1;
 		errorClear();
 		rs = ethRecv(sock, read_to, max_size);
 		//piCoutObj << "readed" << rs;
@@ -742,7 +737,7 @@ int PIEthernet::writeDevice(const void * data, int max_size) {
 		//piCoutObj << "connect SingleTCP" << ip_s << ":" << port_s << "...";
 		if (::connect(sock, (sockaddr * )&PRIVATE->addr_, sizeof(PRIVATE->addr_)) != 0) {
 			//piCoutObj << "Can`t connect to " << ip_s << ":" << port_s << ", " << ethErrorString();
-			closeSocket(sock);
+			msleep(PIP_MIN_MSLEEP);
 			return -1;
 		}
 		//piCoutObj << "ok, write SingleTCP" << int(data) << max_size << "bytes ...";
@@ -776,19 +771,15 @@ int PIEthernet::writeDevice(const void * data, int max_size) {
 #endif
 			//piCoutObj << "connect to " << ip << ":" << port_;
 			connected_ = (::connect(sock, (sockaddr * )&PRIVATE->addr_, sizeof(PRIVATE->addr_)) == 0);
-			if (!connected_) {
+			if (!connected_)
 				piCoutObj << "Can`t connect to" << addr_r << "," << ethErrorString();
-			}
 			opened_ = connected_;
 			if (connected_) {
 				connecting_ = false;
 				connected();
 			}
 		}
-		if (!connected_) {
-			closeSocket(sock);
-			return -1;
-		}
+		if (!connected_) return -1;
 		ret = ::send(sock, (const char *)data, max_size, 0);
 		if (ret < 0) {
 			connected_ = false;
diff --git a/libs/main/io_devices/pifile.cpp b/libs/main/io_devices/pifile.cpp
index efbcb521..8f598b05 100644
--- a/libs/main/io_devices/pifile.cpp
+++ b/libs/main/io_devices/pifile.cpp
@@ -154,6 +154,12 @@ bool PIFile::openTemporary(PIIODevice::DeviceMode mode) {
 }
 
 
+PIFile::~PIFile() {
+	stop();
+	close();
+}
+
+
 bool PIFile::openDevice() {
 	close();
 	PIString p = path();
diff --git a/libs/main/io_devices/pifile.h b/libs/main/io_devices/pifile.h
index ca6d0e6b..56b1df6f 100644
--- a/libs/main/io_devices/pifile.h
+++ b/libs/main/io_devices/pifile.h
@@ -91,7 +91,7 @@ public:
 	//! Open temporary file with open mode "mode"
 	bool openTemporary(PIIODevice::DeviceMode mode = PIIODevice::ReadWrite);
 
-	~PIFile() {closeDevice();}
+	virtual ~PIFile();
 	
 	//! Immediate write all buffered data to disk
 	void flush();
diff --git a/libs/main/io_devices/piiobytearray.h b/libs/main/io_devices/piiobytearray.h
index 64212646..57bec2e4 100644
--- a/libs/main/io_devices/piiobytearray.h
+++ b/libs/main/io_devices/piiobytearray.h
@@ -37,8 +37,6 @@ public:
 	//! Contructs %PIIOByteArray with \"buffer\" content only for read
 	explicit PIIOByteArray(const PIByteArray & buffer);
 	
-	~PIIOByteArray() {closeDevice();}
-	
 	//! Returns content
 	PIByteArray * byteArray() const {return data_;}
 	
diff --git a/libs/main/io_devices/piiodevice.cpp b/libs/main/io_devices/piiodevice.cpp
index ec54085b..9dea9dd6 100644
--- a/libs/main/io_devices/piiodevice.cpp
+++ b/libs/main/io_devices/piiodevice.cpp
@@ -137,11 +137,6 @@ PIIODevice::PIIODevice(const PIString & path, PIIODevice::DeviceMode mode): PITh
 
 PIIODevice::~PIIODevice() {
 	stop();
-	if (opened_) {
-		closeDevice();
-		if (!opened_)
-			closed();
-	}
 }
 
 
diff --git a/libs/main/io_devices/piiostring.h b/libs/main/io_devices/piiostring.h
index c195c0cd..9301060d 100644
--- a/libs/main/io_devices/piiostring.h
+++ b/libs/main/io_devices/piiostring.h
@@ -37,8 +37,6 @@ public:
 	//! Contructs %PIIOString with \"string\" content only for read
 	explicit PIIOString(const PIString & string);
 	
-	~PIIOString() {closeDevice();}
-	
 	//! Returns content
 	PIString * string() const {return str;}
 	
diff --git a/libs/main/io_devices/pipeer.cpp b/libs/main/io_devices/pipeer.cpp
index 85cc0bc3..96a07810 100644
--- a/libs/main/io_devices/pipeer.cpp
+++ b/libs/main/io_devices/pipeer.cpp
@@ -181,6 +181,7 @@ PIPeer::PIPeer(const PIString & n): PIIODevice(), inited__(false), eth_tcp_srv(P
 
 PIPeer::~PIPeer() {
 	//piCout << "~PIPeer" << uint(this);
+	stop();
 	if (destroyed) return;
 	destroyed = true;
 	sync_timer.stop();
diff --git a/libs/main/io_devices/piserial.cpp b/libs/main/io_devices/piserial.cpp
index 4c526a62..07fdded6 100644
--- a/libs/main/io_devices/piserial.cpp
+++ b/libs/main/io_devices/piserial.cpp
@@ -197,7 +197,8 @@ PISerial::PISerial(const PIString & device_, PISerial::Speed speed_, PIFlags<PIS
 
 
 PISerial::~PISerial() {
-	closeDevice();
+	stop();
+	close();
 }
 
 
diff --git a/libs/main/io_devices/piserial.h b/libs/main/io_devices/piserial.h
index 4b8cae4e..8b30ed8f 100644
--- a/libs/main/io_devices/piserial.h
+++ b/libs/main/io_devices/piserial.h
@@ -97,7 +97,7 @@ public:
 	//! Contructs %PISerial with device name "device", speed "speed" and parameters "params"
 	explicit PISerial(const PIString & device, PISerial::Speed speed = S115200, PIFlags<PISerial::Parameters> params = 0);
 	
-	~PISerial();
+	virtual ~PISerial();
 
 	
 	//! Set both input and output speed to "speed"
diff --git a/libs/main/io_devices/pisharedmemory.cpp b/libs/main/io_devices/pisharedmemory.cpp
index 63e43293..daaaa2c2 100644
--- a/libs/main/io_devices/pisharedmemory.cpp
+++ b/libs/main/io_devices/pisharedmemory.cpp
@@ -89,6 +89,12 @@ PISharedMemory::PISharedMemory(const PIString & shm_name, int size, PIIODevice::
 }
 
 
+PISharedMemory::~PISharedMemory() {
+	stop();
+	close();
+}
+
+
 bool PISharedMemory::openDevice() {
 	close();
 	//piCoutObj << "try open" << path() << dsize;
diff --git a/libs/main/io_devices/pisharedmemory.h b/libs/main/io_devices/pisharedmemory.h
index 36bd8c3f..495739f6 100644
--- a/libs/main/io_devices/pisharedmemory.h
+++ b/libs/main/io_devices/pisharedmemory.h
@@ -37,7 +37,7 @@ public:
 	explicit PISharedMemory(const PIString & shm_name, int size, DeviceMode mode = ReadWrite);
 	
 	
-	virtual ~PISharedMemory() {close();}
+	virtual ~PISharedMemory();
 	
 	//! Read all shared memory object content to byte array and return it
 	PIByteArray readAll();
diff --git a/libs/main/io_devices/pispi.cpp b/libs/main/io_devices/pispi.cpp
index 55bcc99e..80a1e5bc 100644
--- a/libs/main/io_devices/pispi.cpp
+++ b/libs/main/io_devices/pispi.cpp
@@ -59,6 +59,12 @@ PISPI::PISPI(const PIString & path, uint speed, PIIODevice::DeviceMode mode) : P
 }
 
 
+PISPI::~PISPI() {
+	stop();
+	close();
+}
+
+
 void PISPI::setSpeed(uint speed_hz) {
 	spi_speed = speed_hz;
 }
diff --git a/libs/main/io_devices/pispi.h b/libs/main/io_devices/pispi.h
index 7c30a59f..29284a45 100644
--- a/libs/main/io_devices/pispi.h
+++ b/libs/main/io_devices/pispi.h
@@ -31,7 +31,7 @@ class PIP_EXPORT PISPI: public PIIODevice
 	PIIODEVICE(PISPI)
 public:
 	explicit PISPI(const PIString & path = PIString(), uint speed_hz = 1000000, PIIODevice::DeviceMode mode = PIIODevice::ReadWrite);
-	~PISPI() {}
+	virtual ~PISPI();
 
 	//! \brief Parameters of PISPI
 	enum Parameters {
diff --git a/libs/main/io_devices/pitransparentdevice.cpp b/libs/main/io_devices/pitransparentdevice.cpp
index 6ea60f2b..42f1a609 100644
--- a/libs/main/io_devices/pitransparentdevice.cpp
+++ b/libs/main/io_devices/pitransparentdevice.cpp
@@ -37,6 +37,12 @@ PITransparentDevice::PITransparentDevice() {
 }
 
 
+PITransparentDevice::~PITransparentDevice() {
+	stop();
+	close();
+}
+
+
 int PITransparentDevice::readDevice(void * read_to, int max_size) {
 	if (!canRead()) return -1;
 	que_mutex.lock();
diff --git a/libs/main/io_devices/pitransparentdevice.h b/libs/main/io_devices/pitransparentdevice.h
index f1478668..4b49eb4b 100644
--- a/libs/main/io_devices/pitransparentdevice.h
+++ b/libs/main/io_devices/pitransparentdevice.h
@@ -34,7 +34,7 @@ public:
 	//! Contructs empty %PITransparentDevice
 	explicit PITransparentDevice();
 	
-	~PITransparentDevice() {closeDevice();}
+	virtual ~PITransparentDevice();
 	
 protected:
 	bool openDevice();
diff --git a/libs/main/io_devices/piusb.h b/libs/main/io_devices/piusb.h
index 2b17d382..5ba47d8c 100644
--- a/libs/main/io_devices/piusb.h
+++ b/libs/main/io_devices/piusb.h
@@ -32,7 +32,7 @@ class PIP_EXPORT PIUSB: public PIIODevice
 	PIIODEVICE(PIUSB)
 public:
 	explicit PIUSB(ushort vid = 0, ushort pid = 0);
-	~PIUSB() {closeDevice();}
+	virtual ~PIUSB();
 
 	struct PIP_EXPORT Endpoint {
 		Endpoint(uchar a = 0, uchar at = 0, ushort mps = 0) {address = a; attributes = at; max_packet_size = mps; parse();}
diff --git a/libs/usb/piusb.cpp b/libs/usb/piusb.cpp
index 91e131a3..6db89eab 100644
--- a/libs/usb/piusb.cpp
+++ b/libs/usb/piusb.cpp
@@ -46,6 +46,11 @@ PIUSB::PIUSB(ushort vid, ushort pid): PIIODevice("", ReadWrite) {
 }
 
 
+PIUSB::~PIUSB() {
+	stop();
+	close();
+}
+
 void PIUSB::Endpoint::parse() {
 	synchronisation_type = NoSynchonisation;
 	usage_type = DataEndpoint;
diff --git a/main.cpp b/main.cpp
index a69c28d7..193896f4 100644
--- a/main.cpp
+++ b/main.cpp
@@ -12,6 +12,7 @@ int main() {
 //	}
 //	s.open();
 	s.startThreadedRead();
-	piSleep(200);
+	piSleep(2);
+//	s.stopThreadedRead();
 	return 0;
 }