diff --git a/libshvchainpack/include/shv/chainpack/rpcdriver.h b/libshvchainpack/include/shv/chainpack/rpcdriver.h
index a77bd42e..960fc814 100644
--- a/libshvchainpack/include/shv/chainpack/rpcdriver.h
+++ b/libshvchainpack/include/shv/chainpack/rpcdriver.h
@@ -27,18 +27,19 @@ class SHVCHAINPACK_DECL_EXPORT RpcDriver
 	virtual bool isOpen() = 0;
 
 	virtual void writeFrameData(const std::string &frame_data) = 0;
-	virtual void onFrameDataRead(const std::string &frame_data);
 
+	void processRpcFrame(RpcFrame &&frame);
 	virtual void onRpcFrameReceived(RpcFrame &&frame);
 	virtual void onParseDataException(const shv::chainpack::ParseException &e) = 0;
 	virtual void onRpcMessageReceived(const shv::chainpack::RpcMessage &msg) = 0;
 
 	void setClientProtocolType(Rpc::ProtocolType pt) { m_clientProtocolType = pt; }
+protected:
+	/// We must remember recent message protocol type to support legacy CPON clients
+	Rpc::ProtocolType m_clientProtocolType = Rpc::ProtocolType::Invalid;
 private:
 	// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
 	static int s_defaultRpcTimeoutMsec;
-	/// We must remember recent message protocol type to support legacy CPON clients
-	Rpc::ProtocolType m_clientProtocolType = Rpc::ProtocolType::Invalid;
 };
 
 }
diff --git a/libshvchainpack/include/shv/chainpack/socketrpcdriver.h b/libshvchainpack/include/shv/chainpack/socketrpcdriver.h
index 44359a20..e77f1cdf 100644
--- a/libshvchainpack/include/shv/chainpack/socketrpcdriver.h
+++ b/libshvchainpack/include/shv/chainpack/socketrpcdriver.h
@@ -22,6 +22,7 @@ class SHVCHAINPACK_DECL_EXPORT SocketRpcDriver : public RpcDriver
 	bool isOpen() override;
 	void writeFrameData(const std::string &frame_data) override;
 
+	virtual void onFrameDataRead(const std::string &frame_data);
 	virtual void idleTaskOnSelectTimeout();
 private:
 	bool isOpenImpl() const;
diff --git a/libshvchainpack/src/rpcdriver.cpp b/libshvchainpack/src/rpcdriver.cpp
index bddc6e1e..bee3d221 100644
--- a/libshvchainpack/src/rpcdriver.cpp
+++ b/libshvchainpack/src/rpcdriver.cpp
@@ -57,31 +57,6 @@ void RpcDriver::sendRpcFrame(RpcFrame &&frame)
 	}
 }
 
-void RpcDriver::onFrameDataRead(const std::string &frame_data)
-{
-	logRpcData().nospace() << "FRAME DATA READ " << frame_data.size() << " bytes of data read:\n" << shv::chainpack::utils::hexDump(frame_data);
-	try {
-		auto frame = RpcFrame::fromFrameData(frame_data);
-
-		// set client protocol type according to protocol type received from it
-		// default protocol type is chainpack, this is needed just for legacy devices support
-		if (m_clientProtocolType == Rpc::ProtocolType::Invalid) {
-			m_clientProtocolType = frame.protocol;
-		}
-
-		onRpcFrameReceived(std::move(frame));
-	}
-	catch (const ParseException &e) {
-		logRpcDataW() << "ERROR - Rpc frame data corrupted:" << e.what();
-		//logRpcDataW() << "The error occured in data:\n" << shv::chainpack::utils::hexDump(m_readData.data(), 1024);
-		onParseDataException(e);
-		return;
-	}
-	catch (const std::exception &e) {
-		nError() << "ERROR - Rpc frame process error:" << e.what();
-	}
-}
-
 int RpcDriver::defaultRpcTimeoutMsec()
 {
 	return s_defaultRpcTimeoutMsec;
@@ -92,11 +67,19 @@ void RpcDriver::setDefaultRpcTimeoutMsec(int msec)
 	s_defaultRpcTimeoutMsec = msec;
 }
 
-void RpcDriver::onRpcFrameReceived(RpcFrame &&frame)
+void RpcDriver::processRpcFrame(RpcFrame &&frame)
 {
+	// set client protocol type according to protocol type received from it
+	// default protocol type is chainpack, this is needed just for legacy devices support
 	if (m_clientProtocolType == Rpc::ProtocolType::Invalid) {
 		m_clientProtocolType = frame.protocol;
 	}
+
+	onRpcFrameReceived(std::move(frame));
+}
+
+void RpcDriver::onRpcFrameReceived(RpcFrame &&frame)
+{
 	std::string errmsg;
 	auto msg = frame.toRpcMessage(&errmsg);
 	if (errmsg.empty()) {
diff --git a/libshvchainpack/src/socketrpcdriver.cpp b/libshvchainpack/src/socketrpcdriver.cpp
index 48ffef1d..6fec2cd3 100644
--- a/libshvchainpack/src/socketrpcdriver.cpp
+++ b/libshvchainpack/src/socketrpcdriver.cpp
@@ -21,6 +21,9 @@
 #include <netdb.h>
 #endif
 
+#define logRpcData() nCMessage("RpcData")
+#define logRpcDataW() nCWarning("RpcData")
+
 namespace cp = shv::chainpack;
 
 namespace shv::chainpack {
@@ -65,6 +68,24 @@ void SocketRpcDriver::writeFrameData(const std::string &frame_data)
 	}
 }
 
+void SocketRpcDriver::onFrameDataRead(const std::string &frame_data)
+{
+	logRpcData().nospace() << "FRAME DATA READ " << frame_data.size() << " bytes of data read:\n" << shv::chainpack::utils::hexDump(frame_data);
+	try {
+		auto frame = RpcFrame::fromFrameData(frame_data);
+		processRpcFrame(std::move(frame));
+	}
+	catch (const ParseException &e) {
+		logRpcDataW() << "ERROR - Rpc frame data corrupted:" << e.what();
+		//logRpcDataW() << "The error occured in data:\n" << shv::chainpack::utils::hexDump(m_readData.data(), 1024);
+		onParseDataException(e);
+		return;
+	}
+	catch (const std::exception &e) {
+		nError() << "ERROR - Rpc frame process error:" << e.what();
+	}
+}
+
 bool SocketRpcDriver::flush()
 {
 	if(m_writeBuffer.empty()) {
diff --git a/libshviotqt/src/rpc/socketrpcconnection.cpp b/libshviotqt/src/rpc/socketrpcconnection.cpp
index fc06be76..a873c03d 100644
--- a/libshviotqt/src/rpc/socketrpcconnection.cpp
+++ b/libshviotqt/src/rpc/socketrpcconnection.cpp
@@ -85,7 +85,7 @@ void SocketRpcConnection::onReadyRead()
 {
 	auto frames = socket()->takeFrames();
 	for (auto begin = std::make_move_iterator(frames.begin()), end = std::make_move_iterator(frames.end()); begin != end; ++begin) {
-		onRpcFrameReceived(*begin);
+		processRpcFrame(*begin);
 	}
 }