diff --git a/services/floorheat_svc/heater.cpp b/services/floorheat_svc/heater.cpp
index c903339..0ec3cde 100644
--- a/services/floorheat_svc/heater.cpp
+++ b/services/floorheat_svc/heater.cpp
@@ -133,30 +133,32 @@ struct ResistiveFloorHeater::Impl : private boost::noncopyable {
         }
     }
 
-    awaitable_expected< void > subscribe(std::string_view topic, std::function< void(const boost::json::value & object) > cb) {
+    awaitable_expected< void > subscribe(std::string_view topic,
+      std::function< awaitable_expected< void >(const boost::json::value & object) > cb) {
         spdlog::trace("Heater subscribing to {}", topic);
         ASYNC_CHECK_MSG(_mqtt_client.subscribe(topic, std::move(cb)), "Heater faild to subscribe on: {}", topic);
         co_return heater_expected_void{};
     }
-    
-    inline double to_double(const boost::json::value& v) const {
-        if (v.is_double())
+
+    inline double to_double(const boost::json::value & v) const {
+        if(v.is_double())
             return v.as_double();
-        else if (v.is_int64())
-            return static_cast<double>(v.as_int64());
-        else if (v.is_uint64())
-            return static_cast<double>(v.as_uint64());
+        else if(v.is_int64())
+            return static_cast< double >(v.as_int64());
+        else if(v.is_uint64())
+            return static_cast< double >(v.as_uint64());
         throw std::runtime_error("Invalid type for double conversion");
     }
-    
+
     awaitable_expected< void > subscribeToTemperatureUpdate() {
         auto topic = std::format("home/{}/floor/temperature", _room);
 
-        auto cb = [=, this](const boost::json::value & object) {
+        auto cb = [=, this](const boost::json::value & object) -> awaitable_expected< void > {
             temperature = to_double(object.at("value"));
             spdlog::trace("Heater temperature update {} for {}", temperature, _room);
             _measurements.push_back({std::chrono::system_clock::now(), temperature});
             update = true;
+            co_return heater_expected_void{};
         };
 
         ASYNC_CHECK(subscribe(topic, std::move(cb)));
@@ -166,10 +168,11 @@ struct ResistiveFloorHeater::Impl : private boost::noncopyable {
     awaitable_expected< void > subscribeToTargetTemperatureUpdate() {
         auto topic = std::format("home/heating/{}/floor/temperature/command", _room);
 
-        auto cb = [=, this](const boost::json::value & object) {
+        auto cb = [=, this](const boost::json::value & object) -> awaitable_expected< void > {
             targetTemperature = to_double(object.at("value"));
             spdlog::trace("Heater target temperature update {} for {}", targetTemperature, _room);
             update = true;
+            co_return heater_expected_void{};
         };
 
         ASYNC_CHECK(subscribe(topic, std::move(cb)));
@@ -179,8 +182,9 @@ struct ResistiveFloorHeater::Impl : private boost::noncopyable {
     awaitable_expected< void > subscribeToTargetProfileUpdate() {
         auto topic = std::format("home/{}/floor/heating/profile/set", _room);
 
-        auto cb = [=, this](const boost::json::value & object) { //
+        auto cb = [=, this](const boost::json::value & object) -> awaitable_expected< void > { //
             spdlog::warn("not implemented");
+            co_return heater_expected_void{};
         };
 
         ASYNC_CHECK(subscribe(topic, std::move(cb)));
@@ -205,7 +209,7 @@ ResistiveFloorHeater::ResistiveFloorHeater(boost::asio::any_io_executor & io, st
 ResistiveFloorHeater::~ResistiveFloorHeater() = default;
 awaitable_expected< void > ResistiveFloorHeater::start() noexcept {
     BOOST_ASSERT(_impl);
-    
+
     return _impl->start();
 }
 
diff --git a/services/floorheat_svc/mqtt_client.cpp b/services/floorheat_svc/mqtt_client.cpp
index 286f84a..a23cc25 100644
--- a/services/floorheat_svc/mqtt_client.cpp
+++ b/services/floorheat_svc/mqtt_client.cpp
@@ -56,7 +56,7 @@ using mqtt_expected_void = expected< void, boost::system::error_code >;
 struct AsyncMqttClient::AsyncMqttClientImpl {
     const boost::asio::any_io_executor & _executor;
     client_type _mqtt_client;
-    std::unordered_map< std::string, std::function< void(const boost::json::value &) > > _callbacks;
+    std::unordered_map< std::string, std::function< awaitable_expected< void >(const boost::json::value &) > > _callbacks;
 
     AsyncMqttClientImpl(const boost::asio::any_io_executor & executor) : _executor{executor}, _mqtt_client{_executor} {
         spdlog::trace("Creating mqtt client");
@@ -137,7 +137,10 @@ struct AsyncMqttClient::AsyncMqttClientImpl {
                     /// TODO topic filtering as part of unordered map?
                     ///  unordered map can map only one thing, maybe vector would be better?
                     spdlog::debug("MQTT executing callback for: {}", topic);
-                    it->second(value); /// TODO pass topic to callbacl?
+                    if(auto ret = co_await it->second(value); not ret) {
+                        spdlog::warn("MQTT catched error: {}, during callback execution", ret.error().message());
+                        continue;
+                    }
                 } else {
                     spdlog::warn("MQTT received unsupported topic: {}", topic);
                 }
@@ -162,7 +165,7 @@ struct AsyncMqttClient::AsyncMqttClientImpl {
 AsyncMqttClient::AsyncMqttClient(const boost::asio::any_io_executor & executor)
  : _impl{std::make_unique< AsyncMqttClient::AsyncMqttClientImpl >(executor)} {}
 
-awaitable_expected<void> AsyncMqttClient::subscribe(std::string_view topic, std::function< void(const boost::json::value &) > cb) noexcept {
+awaitable_expected<void> AsyncMqttClient::subscribe(std::string_view topic, std::function< awaitable_expected< void >(const boost::json::value &) > cb) noexcept {
     BOOST_ASSERT(_impl);
     BOOST_ASSERT(not topic.empty());
     BOOST_ASSERT(cb);
diff --git a/services/floorheat_svc/mqtt_client.hpp b/services/floorheat_svc/mqtt_client.hpp
index c9d277c..b61d562 100644
--- a/services/floorheat_svc/mqtt_client.hpp
+++ b/services/floorheat_svc/mqtt_client.hpp
@@ -3,6 +3,7 @@
 #include <config.hpp>
 
 #include <memory>
+#include <optional>
 #include <string_view>
 
 namespace boost::json {
@@ -24,12 +25,13 @@ class AsyncMqttClient {
         std::string_view topic;
         
         /* response topic */
-        std::string_view responseTopic;
+        std::optional<std::string_view> responseTopic;
         
         /* value assosiated to request */
         const boost::json::value & value;
         
         /* memory_resource of client */
+        // TBD
     };
 
     struct AsyncMqttClientImpl;
@@ -38,7 +40,7 @@ class AsyncMqttClient {
     AsyncMqttClient(const executor & executor);
     ~AsyncMqttClient();
 
-    awaitable_expected< void > subscribe(std::string_view topic, std::function< void(const boost::json::value & value) >) noexcept;
+    awaitable_expected< void > subscribe(std::string_view topic, std::function< awaitable_expected< void >(const boost::json::value & value) >) noexcept;
     awaitable_expected< void > listen() const noexcept;
 };