diff --git a/libs/cloud/picloudbase.cpp b/libs/cloud/picloudbase.cpp
index bd9c9b77..10110a31 100644
--- a/libs/cloud/picloudbase.cpp
+++ b/libs/cloud/picloudbase.cpp
@@ -2,7 +2,7 @@
 
 
 PICloudBase::PICloudBase() : eth(PIEthernet::TCP_Client), streampacker(&eth), tcp(&streampacker) {
-
+	eth.setDebug(false);
 }
 
 
diff --git a/libs/cloud/picloudclient.cpp b/libs/cloud/picloudclient.cpp
index 06239090..d959a57d 100644
--- a/libs/cloud/picloudclient.cpp
+++ b/libs/cloud/picloudclient.cpp
@@ -25,10 +25,10 @@ PICloudClient::PICloudClient(const PIString & path, PIIODevice::DeviceMode mode)
 	tcp.setRole(PICloud::TCP::Client);
 	setName("cloud_client");
 	is_connected = false;
-	CONNECTL(&eth, connected, [this](){tcp.sendStart();});
+	CONNECTL(&eth, connected, [this](){opened_ = true; tcp.sendStart();});
 	CONNECTU(&streampacker, packetReceiveEvent, this, _readed);
 	CONNECTL(&eth, disconnected, [this](bool){
-		piCoutObj << "disconnected";
+//		piCoutObj << "disconnected";
 		opened_ = false;
 		is_connected = false;
 		cond_connect.notifyOne();
diff --git a/libs/cloud/picloudserver.cpp b/libs/cloud/picloudserver.cpp
index 74261d67..0a07b67b 100644
--- a/libs/cloud/picloudserver.cpp
+++ b/libs/cloud/picloudserver.cpp
@@ -32,6 +32,9 @@ PICloudServer::PICloudServer(const PIString & path, PIIODevice::DeviceMode mode)
 		opened_ = false;
 		piMSleep(100);
 	});
+	CONNECTL(&ping_timer, tickEvent, [this] (void *, int){
+		if (eth.isConnected()) tcp.sendPing();
+	});
 }
 
 
@@ -58,8 +61,10 @@ bool PICloudServer::openDevice() {
 	bool op = eth.connect(PIEthernet::Address::resolve(path()), false);
 	if (op) {
 		eth.startThreadedRead();
+		ping_timer.start(5000);
 		return true;
 	}
+	ping_timer.stop();
 	eth.close();
 	return false;
 }
diff --git a/libs/cloud/picloudtcp.cpp b/libs/cloud/picloudtcp.cpp
index 7f1e0d38..def39395 100644
--- a/libs/cloud/picloudtcp.cpp
+++ b/libs/cloud/picloudtcp.cpp
@@ -87,7 +87,7 @@ int PICloud::TCP::sendData(const PIByteArray & data) {
 	PIByteArray ba;
 	ba << header;
 	ba.append(data);
-//	piCout << "sendData" << ba.toHex();
+//	piCout << "[PICloud::TCP] sendData" << ba.toHex();
 	streampacker->send(ba);
 	return data.size_s();
 }
@@ -103,6 +103,15 @@ int PICloud::TCP::sendData(const PIByteArray & data, uint client_id) {
 }
 
 
+void PICloud::TCP::sendPing() {
+	header.type = PICloud::TCP::Ping;
+	PIByteArray ba;
+	ba << header;
+	ba.append(suuid);
+	streampacker->send(ba);
+}
+
+
 PIPair<PICloud::TCP::Type, PICloud::TCP::Role> PICloud::TCP::parseHeader(PIByteArray & ba) {
 	PIPair<PICloud::TCP::Type, PICloud::TCP::Role> ret;
 	ret.first = InvalidType;
diff --git a/libs/io_utils/pibroadcast.cpp b/libs/io_utils/pibroadcast.cpp
index d73952ac..0a064ea5 100644
--- a/libs/io_utils/pibroadcast.cpp
+++ b/libs/io_utils/pibroadcast.cpp
@@ -203,6 +203,10 @@ void PIBroadcast::initAll(PIVector<PIEthernet::Address> al) {
 
 
 void PIBroadcast::send(const PIByteArray & data) {
+	if (!isRunning()) {
+		reinit();
+		PIThread::start(3000);
+	}
 	PIByteArray cd = cryptData(data);
 	if (cd.isEmpty()) return;
 	PIMutexLocker ml(mcast_mutex);
diff --git a/libs/main/cloud/picloudserver.h b/libs/main/cloud/picloudserver.h
index e0493564..899ad326 100644
--- a/libs/main/cloud/picloudserver.h
+++ b/libs/main/cloud/picloudserver.h
@@ -78,6 +78,7 @@ private:
 
 	PIVector<Client *> clients_;
 	PIMap<uint, Client *> index_clients;
+	PITimer ping_timer;
 	mutable PIMutex clients_mutex;
 };
 
diff --git a/libs/main/cloud/picloudtcp.h b/libs/main/cloud/picloudtcp.h
index 16dfd801..c941b51c 100644
--- a/libs/main/cloud/picloudtcp.h
+++ b/libs/main/cloud/picloudtcp.h
@@ -52,6 +52,7 @@ public:
 		Connect = 1,
 		Disconnect = 2,
 		Data = 3,
+		Ping = 4,
 	};
 
 	TCP(PIStreamPacker * s);
@@ -65,6 +66,7 @@ public:
 	void sendDisconnected(uint client_id);
 	int sendData(const PIByteArray & data);
 	int sendData(const PIByteArray & data, uint client_id);
+	void sendPing();
 	PIPair<PICloud::TCP::Type, PICloud::TCP::Role> parseHeader(PIByteArray & ba);
 	PIByteArray parseData(PIByteArray & ba);
 	PIPair<uint, PIByteArray> parseDataServer(PIByteArray & ba);
diff --git a/main.cpp b/main.cpp
index 9f4f46d9..66ab2f11 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2,25 +2,7 @@
 
 
 int main(int argc, char * argv[]) {
-	PIByteArray v0 = PIByteArray::fromHex("01020304");
-	PIByteArray v1 = PIByteArray::fromHex("01020304");
-	piCout << "==" << (v0 == v1) << ", !=" << (v0 != v1) << ", <" << (v0 < v1) << ", >" << (v0 > v1);
-	v0 = PIByteArray::fromHex("0102030405");
-	v1 = PIByteArray::fromHex("01020304");
-	piCout << "==" << (v0 == v1) << ", !=" << (v0 != v1) << ", <" << (v0 < v1) << ", >" << (v0 > v1);
-	v0 = PIByteArray::fromHex("01020304");
-	v1 = PIByteArray::fromHex("0102030405");
-	piCout << "==" << (v0 == v1) << ", !=" << (v0 != v1) << ", <" << (v0 < v1) << ", >" << (v0 > v1);
-	v0 = PIByteArray::fromHex("01020404");
-	v1 = PIByteArray::fromHex("01020304");
-	piCout << "==" << (v0 == v1) << ", !=" << (v0 != v1) << ", <" << (v0 < v1) << ", >" << (v0 > v1);
-	v0 = PIByteArray::fromHex("0102040405");
-	v1 = PIByteArray::fromHex("01020304");
-	piCout << "==" << (v0 == v1) << ", !=" << (v0 != v1) << ", <" << (v0 < v1) << ", >" << (v0 > v1);
-	v0 = PIByteArray::fromHex("01020404");
-	v1 = PIByteArray::fromHex("0102030405");
-	piCout << "==" << (v0 == v1) << ", !=" << (v0 != v1) << ", <" << (v0 < v1) << ", >" << (v0 > v1);
-	/*PICLI cli(argc, argv);
+	PICLI cli(argc, argv);
 	PITimer tm;
 	cli.addArgument("connect", true);
 	cli.addArgument("name", true);
@@ -77,6 +59,6 @@ int main(int argc, char * argv[]) {
 	PIKbdListener ls;
 	ls.enableExitCapture(PIKbdListener::F10);
 	ls.start();
-	WAIT_FOR_EXIT*/
+	WAIT_FOR_EXIT
 	return 0;
 }
diff --git a/utils/cloud_dispatcher/cloudserver.cpp b/utils/cloud_dispatcher/cloudserver.cpp
index d3c58aee..09241e9b 100644
--- a/utils/cloud_dispatcher/cloudserver.cpp
+++ b/utils/cloud_dispatcher/cloudserver.cpp
@@ -7,6 +7,8 @@ CloudServer::CloudServer(DispatcherClient * c, const PIByteArray & sname) : serv
 		DispatcherClient * cl = index_clients.value(id, nullptr);
 		if (cl) cl->sendData(ba);
 	}));
+	CONNECTL(c, pingReceived, [this]() {last_ping.reset();});
+	last_ping.reset();
 }
 
 
@@ -23,6 +25,7 @@ PIByteArray CloudServer::serverUUID() const {
 
 
 void CloudServer::addClient(DispatcherClient * c) {
+	last_ping.reset();
 	clients << c;
 	index_clients.insert(c->clientId(), c);
 	c->sendConnected(1);
@@ -37,6 +40,7 @@ void CloudServer::addClient(DispatcherClient * c) {
 
 
 void CloudServer::removeClient(DispatcherClient * c) {
+	last_ping.reset();
 	clients.removeOne(c);
 	index_clients.removeOne(c->clientId());
 	server->sendDisconnected(c->clientId());
@@ -48,6 +52,11 @@ PIVector<DispatcherClient *> CloudServer::getClients() {
 }
 
 
+double CloudServer::lastPing() {
+	return last_ping.elapsed_s();
+}
+
+
 void CloudServer::printStatus() {
 	piCout << "    " << "Clients for" << server->address() << server_uuid.toHex() << ":";
 	for (auto c: clients) {
diff --git a/utils/cloud_dispatcher/cloudserver.h b/utils/cloud_dispatcher/cloudserver.h
index 14573a67..bd6fd5dd 100644
--- a/utils/cloud_dispatcher/cloudserver.h
+++ b/utils/cloud_dispatcher/cloudserver.h
@@ -15,12 +15,14 @@ public:
 	PIVector<DispatcherClient*> getClients();
 	EVENT_HANDLER0(void, printStatus);
 	const DispatcherClient * getConnection() const {return server;}
+	double lastPing();
 
 private:
 	DispatcherClient * server;
 	PIVector<DispatcherClient*> clients;
 	PIMap<uint, DispatcherClient*> index_clients;
 	PIByteArray server_uuid;
+	PITimeMeasurer last_ping;
 };
 
 #endif // CLOUDSERVER_H
diff --git a/utils/cloud_dispatcher/dispatcherclient.cpp b/utils/cloud_dispatcher/dispatcherclient.cpp
index cc86dcd6..936bfca7 100644
--- a/utils/cloud_dispatcher/dispatcherclient.cpp
+++ b/utils/cloud_dispatcher/dispatcherclient.cpp
@@ -72,10 +72,11 @@ void DispatcherClient::disconnected(bool withError) {
 
 
 void DispatcherClient::readed(PIByteArray & ba) {
-//	piCout << size;
 	PIPair<PICloud::TCP::Type, PICloud::TCP::Role> hdr = tcp.parseHeader(ba);
+//	piCoutObj << "readed" << hdr.first << hdr.second;
 	if (hdr.first == PICloud::TCP::InvalidType) {
 		disconnected(true);
+		piCoutObj << "invalid message";
 		return;
 	}
 	if (authorised) {
@@ -87,7 +88,7 @@ void DispatcherClient::readed(PIByteArray & ba) {
 				disconnected(false);
 			return;
 			case PICloud::TCP::Data:
-//				piCoutObj << "TCP::Data";
+				//piCoutObj << "TCP::Data" << tcp.role();
 				if (tcp.role() == PICloud::TCP::Client) {
 					PIByteArray data = tcp.parseData(ba);
 					if (!data.isEmpty()) dataReaded(data);
@@ -99,11 +100,15 @@ void DispatcherClient::readed(PIByteArray & ba) {
 					else piCoutObj << "invalid data from server";
 				}
 			return;
+			case PICloud::TCP::Ping:
+				pingReceived();
+				return;
 			default:
+				piCoutObj << "unknown data";
 				//disconnected(true);
 			return;
 			}
-		}
+		} else piCoutObj << "invalid role";
 	} else {
 		switch (hdr.first) {
 		case PICloud::TCP::Connect: {
@@ -111,7 +116,8 @@ void DispatcherClient::readed(PIByteArray & ba) {
 			PIByteArray sn = tcp.parseConnect_d(ba);
 			if (hdr.second == PICloud::TCP::Server) registerServer(sn, this);
 			if (hdr.second == PICloud::TCP::Client) registerClient(sn, this);
-			return;}
+			return;
+		}
 		case PICloud::TCP::Disconnect:
 			disconnected(false);
 		return;
diff --git a/utils/cloud_dispatcher/dispatcherclient.h b/utils/cloud_dispatcher/dispatcherclient.h
index 90b20461..9fb5bdbf 100644
--- a/utils/cloud_dispatcher/dispatcherclient.h
+++ b/utils/cloud_dispatcher/dispatcherclient.h
@@ -28,6 +28,7 @@ public:
 	EVENT2(registerClient, const PIByteArray &, sname, DispatcherClient *, client)
 	EVENT1(dataReaded, PIByteArray &, ba)
 	EVENT2(dataReadedServer, uint, id, PIByteArray &, ba)
+	EVENT0(pingReceived)
 
 private:
 	EVENT_HANDLER1(void, readed, PIByteArray &, data);
diff --git a/utils/cloud_dispatcher/dispatcherserver.cpp b/utils/cloud_dispatcher/dispatcherserver.cpp
index 6ebc0094..b5e53228 100644
--- a/utils/cloud_dispatcher/dispatcherserver.cpp
+++ b/utils/cloud_dispatcher/dispatcherserver.cpp
@@ -53,6 +53,10 @@ void DispatcherServer::cleanClients() {
 			if (!rm_clients.contains(c)) rm_clients << c;
 		} else rm_clients.removeAll(c);
 	}
+	auto ss = c_servers.values();
+	for (auto c: ss) {
+		if (c->lastPing() > 15.0) rmrf_clients << const_cast<DispatcherClient *>(c->getConnection());
+	}
 	for (auto c: rm_clients) {
 		if (clients.contains(c)) {
 			rmrf_clients << c;
@@ -60,7 +64,10 @@ void DispatcherServer::cleanClients() {
 	}
 	for (auto c: rmrf_clients) {
 		clients.removeAll(c);
-		index_c_servers.remove(c);
+		if(index_c_servers.contains(c)) {
+			c_servers.remove(c_servers.key(index_c_servers[c]));
+			index_c_servers.remove(c);
+		}
 		index_c_clients.remove(c);
 		rm_clients.removeAll(c);
 	}
@@ -226,9 +233,9 @@ void DispatcherServer::newConnection(PIEthernet *cl) {
 		CloudServer * cs = c_servers.value(sname, nullptr);
 		if (cs) {
 			piCoutObj << "add new Client to Server ->" << sname.toHex();
+			c->authorise(true);
 			cs->addClient(c);
 			index_c_clients.insert(c, cs);
-			c->authorise(true);
 		} else {
 			rm_clients << c;
 			piCoutObj << "Client can't connect to Server ->" << sname.toHex();