diff --git a/cxx/comm_server.h b/cxx/comm_server.h
index 20a0d05..08495b2 100644
--- a/cxx/comm_server.h
+++ b/cxx/comm_server.h
@@ -3,6 +3,7 @@
 #include <filesystem>
 
 #include <asio/awaitable.hpp>
+#include <asio/co_spawn.hpp>
 #include <asio/deferred.hpp>
 #include <asio/detached.hpp>
 #include <asio/ip/tcp.hpp>
@@ -54,12 +55,14 @@ public:
 
 
     template <typename... CtorArgTs>
-    asio::awaitable<void> listen(MccServerEndpoint endpoint, CtorArgTs&&... ctor_args)
+    asio::awaitable<bool> listen(std::derived_from<MccServerEndpoint> auto endpoint, CtorArgTs&&... ctor_args)
     {
+        bool exit_flag = false;
+
         if (!endpoint.isValid()) {
             _serverLogger->error("Cannot start listening! Invalid endpoint string representation ('{}')!",
                                  endpoint.endpoint());
-            co_return;
+            co_return exit_flag;
         }
 
         // add root path to endpoint one
@@ -80,21 +83,26 @@ public:
             s_port.open(pt.string(), ec);
             if (ec) {
                 _serverLogger->error("Cannot open serial device '{}' (Error = '{}')!", pt.string(), ec.message());
-                co_return;
+                co_return exit_flag;
             }
 
-            listen(std::move(s_port));
+            // asio::co_spawn(_asioContext, listen(std::move(s_port)), asio::detached);
+            co_return listen(std::move(s_port));
         } else if (endpoint.isLocal()) {
             // create abstract namespace socket endpoint if its path starts from '@' symbol
             endpoint.makeAbstract('@');
 
 
             if (endpoint.isLocalStream()) {
-                listen(asio::local::stream_protocol::endpoint(pt.string()));
+                co_return listen(asio::local::stream_protocol::endpoint(pt.string()));
+                // asio::co_spawn(_asioContext, listen(asio::local::stream_protocol::endpoint(pt.string())),
+                //                asio::detached);
             } else if (endpoint.isLocalSeqpacket()) {
-                listen(asio::local::seq_packet_protocol::endpoint(pt.string()));
+                co_return listen(asio::local::seq_packet_protocol::endpoint(pt.string()));
+                // asio::co_spawn(_asioContext, listen(asio::local::seq_packet_protocol::endpoint(pt.string())),
+                //                asio::detached);
             } else {
-                co_return;  // ???!!!!
+                co_return exit_flag;  // ???!!!!
             }
         } else if (endpoint.isTCP()) {
             // resolve hostname
@@ -103,17 +111,30 @@ public:
 
                 auto r_result = co_await res.async_resolve(endpoint.host(), endpoint.portView(), asio::deferred);
 
-                listen(std::move(*r_result.begin()));
+                for (auto const& epn : r_result) {
+                    exit_flag = co_await listen(epn);
+                    if (exit_flag) {
+                        break;
+                    }
+                }
+                if (!exit_flag) {
+                    _serverLogger->error("Cannot start listening on any resolved endpoints!");
+                    co_return exit_flag;
+                }
+
+                // listen(std::move(*r_result.begin()));
 
             } catch (const std::system_error& err) {
                 _serverLogger->error("An error occured while resolving '{}' hostname (Error = '{}')", endpoint.host(),
                                      err.code().message());
-                co_return;
+                co_return exit_flag;
             }
         }
+
+        co_return true;
     }
 
-    void listen(traits::mcc_endpoint_c auto endpoint)
+    asio::awaitable<bool> listen(traits::mcc_endpoint_c auto endpoint)
     {
         using epn_t = std::decay_t<decltype(endpoint)>;
 
@@ -124,19 +145,40 @@ public:
             if (!endpoint.is_open()) {
                 if (ec) {
                     // ??????????
-                    _serverLogger->error("Serial port was not open!");
-                    return;
+                    _serverLogger->error("Serial port was not open! Do not start waiting for commands!");
+                    co_return false;
                 }
             }
 
             _serialPorts.emplace_back(std::move(endpoint));
 
-        } else if constexpr (traits::is_tcp_proto<epn_t>) {
-        } else if constexpr (traits::is_local_stream_proto<epn_t>) {
-        } else if constexpr (traits::is_local_seqpack_proto<epn_t>) {
+        } else if constexpr (traits::is_tcp_proto<epn_t> || traits::is_local_stream_proto<epn_t> ||
+                             traits::is_local_seqpack_proto<epn_t>) {
+            try {
+                std::stringstream st;
+                auto acc = epn_t::protocol_type::acceptor(_asioContext, endpoint);
+                st << acc.local_endpoint();
+                _serverLogger->info("Try to start listening at <{}> endpoint ...", st.str());
+
+                if constexpr (traits::is_tcp_proto<epn_t>) {
+                    _tcpAcceptors.emplace_back(std::move(acc));
+                } else if constexpr (traits::is_local_stream_proto<epn_t>) {
+                    _localStreamAcceptors.emplace_back(std::move(acc));
+                } else if constexpr (traits::is_local_seqpack_proto<epn_t>) {
+                    _localSeqpackAcceptors.emplace_back(std::move(acc));
+                } else {
+                    static_assert(false, "INVALID ENDPOINT!!!");
+                }
+
+
+            } catch (const std::system_error& err) {
+                _serverLogger->error("An error occured while creating of connection acceptor! ec = '{}'", err.what());
+            }
         } else {
             static_assert(false, "INVALID ENDPOINT!!!");
         }
+
+        co_return true;
     }
 
 
@@ -241,37 +283,8 @@ private:
     std::vector<asio::local::stream_protocol::acceptor> _localStreamAcceptors;
     std::vector<asio::local::seq_packet_protocol::acceptor> _localSeqpackAcceptors;
 
-    void startAccept(traits::mcc_endpoint_c auto endpoint)
-    {
-        using epn_t = std::decay_t<decltype(endpoint)>;
-
-        try {
-            std::stringstream st;
-            auto acc = epn_t::protocol_type::endpoint(_asioContext, endpoint);
-            st << acc.local_endpoint();
-            _serverLogger->info("Try to start listening at <{}> endpoint ...", st.str());
-
-            if constexpr (traits::is_tcp_proto<epn_t>) {
-                _tcpAcceptors.emplace_back(std::move(acc));
-            } else if constexpr (traits::is_local_stream_proto<epn_t>) {
-                _localStreamAcceptors.emplace_back(std::move(acc));
-            } else if constexpr (traits::is_local_seqpack_proto<epn_t>) {
-                _localSeqpackAcceptors.emplace_back(std::move(acc));
-            } else {
-                static_assert(false, "INVALID ENDPOINT!!!");
-            }
-
-
-        } catch (const std::system_error& err) {
-            _serverLogger->error("An error occured while creating of connection acceptor! ec = '{}'", err.what());
-        }
-    }
-
-    template <typename AccT>
-    void doAccept()
-    {
-    }
 
+    asio::awaitable<void> startSession() {}
 
     // helpers
     template <typename OptT, typename... OptTs>