diff --git a/main.cpp b/main.cpp
index 61c13687..51e6de7d 100644
--- a/main.cpp
+++ b/main.cpp
@@ -12,7 +12,7 @@ REGISTER_VARIANT_CAST(__S__, PIString) {return v.text + PIString::fromNumber(v.i
 REGISTER_VARIANT_CAST(__S__, int) {return v.i;}
 
 int main(int argc, char *argv[]) {
-	__S__ s, s1;
+	/*__S__ s, s1;
 	s.text = "123";
 	s.i = -1;
 	PIVariant v = PIVariant::fromValue(s);
@@ -20,7 +20,16 @@ int main(int argc, char *argv[]) {
 	ba << v;
 	PIVariant v1;
 	ba >> v1;
-	piCout << v1;
+	piCout << v1;*/
+	PISet<int> s0;
+	s0 << 1 << 3 << 5;
+	PIVector<int> v;
+	v << -1 << 8 << 0 << 2 << 1 << 6 << 4 << 3;
+	piCout << s0;
+	PISet<int> s1(v);
+	piCout << s1;
+	s1.subtract(s0);
+	piCout << s1;
 	return 0;
 }
 
diff --git a/src/containers/piset.h b/src/containers/piset.h
index ddb19120..adde5f6d 100644
--- a/src/containers/piset.h
+++ b/src/containers/piset.h
@@ -53,7 +53,20 @@ public:
 	
 	//! Contructs set with elements "v0", "v1", "v2" and "v3"
 	PISet(const T & v0, const T & v1, const T & v2, const T & v3) {_CSet::insert(v0, 0); _CSet::insert(v1, 0); _CSet::insert(v2, 0); _CSet::insert(v3, 0);}
-	
+
+	//! Contructs set from vector of elements
+	PISet(const PIVector<T> & values) {
+		if (values.isEmpty()) return;
+		//_CSet::pim_content.resize(values.size_s());
+		//_CSet::pim_index.resize(values.size_s());
+		for (int i = 0; i < values.size_s(); ++i) {
+			//_CSet::pim_index[i].index = i;
+			//_CSet::pim_index[i].key = values[i];
+			_CSet::insert(values[i], 0);
+		}
+		//_CSet::_sort();
+	}
+
 	typedef T key_type;
 	
 	PISet<T> & operator <<(const T & t) {_CSet::insert(t, 0); return *this;}
@@ -64,9 +77,41 @@ public:
 	
 	//! Returns if element "t" exists in this set
 	PISet<T> & remove(const T & t) {_CSet::remove(t); return *this;}
-	
+
+	//! Unite set with "v"
+	PISet<T> & unite(const PISet<T> & v) {
+		for (typename PIMap<T, uchar>::const_iterator i = v.begin(); i != v.end(); ++i)
+			_CSet::insert(i->first, 0);
+		return *this;
+	}
+
+	//! Subtract set with "v"
+	PISet<T> & subtract(const PISet<T> & v) {
+		for (typename PIMap<T, uchar>::const_iterator i = v.begin(); i != v.end(); ++i)
+			_CSet::remove(i->first);
+		return *this;
+	}
+
 	//! Returns content of set as PIVector
 	PIVector<T> toVector() const {PIVector<T> ret; for (typename _CSet::const_iterator i = _CSet::begin(); i != _CSet::end(); ++i) ret << (*i).first; return ret;}
 };
 
+
+template<typename Type>
+inline PICout operator <<(PICout s, const PISet<Type> & v) {
+	s.space();
+	s.setControl(0, true);
+	s << "{";
+	bool first = true;
+	for (typename PIMap<Type, uchar>::const_iterator i = v.begin(); i != v.end(); ++i) {
+		if (!first)
+			s << ", ";
+		first = false;
+		s << i->first;
+	}
+	s << "}";
+	s.restoreControl();
+	return s;
+}
+
 #endif // PISET_H
diff --git a/src/core/pichunkstream.h b/src/core/pichunkstream.h
index 72ef16c9..f1aac273 100644
--- a/src/core/pichunkstream.h
+++ b/src/core/pichunkstream.h
@@ -67,6 +67,10 @@ public:
 	//! Returns value of last readed chunk
 	template <typename T>
 	T getData() const {T ret; PIByteArray s(last_data); s >> ret; return ret;}
+
+	//! Place value of last readed chunk into "v"
+	template <typename T>
+	void get(T & v) const {v = getData<T>();}
 	
 private:
 	void _init();
diff --git a/src/io/piiodevice.cpp b/src/io/piiodevice.cpp
index f6ecebc2..91ba9570 100755
--- a/src/io/piiodevice.cpp
+++ b/src/io/piiodevice.cpp
@@ -232,13 +232,13 @@ void PIIODevice::run() {
 		return;
 	}
 	if (!thread_started_) {
-		msleep(5);
+		piMSleep(5);
 		//cout << "not started\n";
 		return;
 	}
 	readed_ = read(buffer_tr.data(), buffer_tr.size_s());
 	if (readed_ <= 0) {
-		msleep(10);
+		piMSleep(10);
 		//cout << readed_ << ", " << errno << ", " << errorString() << endl;
 		return;
 	}
diff --git a/src/math/picrypt.cpp b/src/math/picrypt.cpp
index a0df92da..f52baf55 100644
--- a/src/math/picrypt.cpp
+++ b/src/math/picrypt.cpp
@@ -85,7 +85,7 @@ PIByteArray PICrypt::crypt(const PIByteArray & data, PIByteArray key) {
 	crypto_secretbox_easy(ret.data(), data.data(), data.size(), n.data(), key.data());
 	ret.append(n);
 #else
-	piCout << "[PICrypt]" << "Warning: PICrypt is disabled, to enable install sodium library and build pip with -DCRYPT=";
+	piCout << "[PICrypt]" << "Warning: PICrypt is disabled, to enable install sodium library and build pip with -DCRYPT=1";
 #endif
 	return ret;
 }