diff --git a/include/ocpp/common/incremental_counter.hpp b/include/ocpp/common/incremental_counter.hpp
new file mode 100644
index 000000000..0da1e6890
--- /dev/null
+++ b/include/ocpp/common/incremental_counter.hpp
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright Pionix GmbH and Contributors to EVerest
+
+#pragma once
+
+#include <atomic>
+
+namespace ocpp {
+class IncrementalCounter {
+public:
+    static int get();
+
+private:
+    static std::atomic<unsigned int> counter;
+};
+
+} // namespace ocpp
diff --git a/include/ocpp/v201/functional_blocks/diagnostics.hpp b/include/ocpp/v201/functional_blocks/diagnostics.hpp
index b359a131d..4c3497f31 100644
--- a/include/ocpp/v201/functional_blocks/diagnostics.hpp
+++ b/include/ocpp/v201/functional_blocks/diagnostics.hpp
@@ -37,6 +37,8 @@ class DiagnosticsInterface : public MessageHandlerInterface {
 
     /* OCPP message requests */
     virtual void notify_event_req(const std::vector<EventData>& events) = 0;
+    virtual void notify_event_req_connector_status_update(const int32_t evse_id, const int32_t connector_id,
+                                                  const ConnectorStatusEnum status) = 0;
 
     /* Monitoring */
     virtual void stop_monitoring() = 0;
@@ -53,6 +55,8 @@ class Diagnostics : public DiagnosticsInterface {
                 std::optional<ClearCustomerInformationCallback> clear_customer_information_callback);
     void handle_message(const ocpp::EnhancedMessage<MessageType>& message) override;
     void notify_event_req(const std::vector<EventData>& events) override;
+    void notify_event_req_connector_status_update(const int32_t evse_id, const int32_t connector_id,
+                                                  const ConnectorStatusEnum status) override;
     void stop_monitoring() override;
     void start_monitoring() override;
     void process_triggered_monitors() override;
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 4fbaacf02..6c8e25f8a 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -20,6 +20,7 @@ target_sources(ocpp
     PRIVATE
         ocpp/common/call_types.cpp
         ocpp/common/charging_station_base.cpp
+        ocpp/common/incremental_counter.cpp
         ocpp/common/ocpp_logging.cpp
         ocpp/common/schemas.cpp
         ocpp/common/types.cpp
diff --git a/lib/ocpp/common/incremental_counter.cpp b/lib/ocpp/common/incremental_counter.cpp
new file mode 100644
index 000000000..668c47d76
--- /dev/null
+++ b/lib/ocpp/common/incremental_counter.cpp
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright Pionix GmbH and Contributors to EVerest
+
+#include <ocpp/common/incremental_counter.hpp>
+
+namespace ocpp {
+
+std::atomic<unsigned int> IncrementalCounter::counter{0};
+
+int IncrementalCounter::get() {
+    return ++counter;
+}
+
+} // namespace ocpp
\ No newline at end of file
diff --git a/lib/ocpp/v201/charge_point.cpp b/lib/ocpp/v201/charge_point.cpp
index 8d9697aa2..0cfa172f5 100644
--- a/lib/ocpp/v201/charge_point.cpp
+++ b/lib/ocpp/v201/charge_point.cpp
@@ -368,8 +368,14 @@ void ChargePoint::initialize(const std::map<int32_t, int32_t>& evse_connector_st
                 this->registration_status != RegistrationStatusEnum::Accepted) {
                 return false;
             } else {
-                this->availability->status_notification_req(evse_id, connector_id, status,
+                if (this->ocpp_version == OcppProtocolVersion::v201) {
+                    // OCPP2.0.1: B01.FR.05
+                    this->availability->status_notification_req(evse_id, connector_id, status,
                                                             initiated_by_trigger_message);
+                } else {
+                    // OCPP2.1: B01.FR.05
+                    this->diagnostics->notify_event_req_connector_status_update(evse_id, connector_id, status);
+                }
                 return true;
             }
         });
diff --git a/lib/ocpp/v201/functional_blocks/diagnostics.cpp b/lib/ocpp/v201/functional_blocks/diagnostics.cpp
index d8ef0c395..e612c0185 100644
--- a/lib/ocpp/v201/functional_blocks/diagnostics.cpp
+++ b/lib/ocpp/v201/functional_blocks/diagnostics.cpp
@@ -4,6 +4,8 @@
 #include <ocpp/v201/functional_blocks/diagnostics.hpp>
 
 #include <ocpp/common/constants.hpp>
+#include <ocpp/common/incremental_counter.hpp>
+
 #include <ocpp/v201/connectivity_manager.hpp>
 #include <ocpp/v201/ctrlr_component_variables.hpp>
 #include <ocpp/v201/device_model.hpp>
@@ -81,6 +83,21 @@ void Diagnostics::notify_event_req(const std::vector<EventData>& events) {
     this->message_dispatcher.dispatch_call(call);
 }
 
+void Diagnostics::notify_event_req_connector_status_update(const int32_t evse_id, const int32_t connector_id,
+                                                           const ConnectorStatusEnum status) {
+    ocpp::v201::EventData event_data;
+    const auto cv = ConnectorComponentVariables::get_component_variable(evse_id, connector_id,
+                                                                        ConnectorComponentVariables::AvailabilityState);
+    event_data.eventId = ocpp::IncrementalCounter::get();
+    event_data.actualValue = conversions::connector_status_enum_to_string(status);
+    event_data.trigger = EventTriggerEnum::Delta;
+    event_data.variable = cv.variable.value();
+    event_data.component = cv.component;
+    event_data.timestamp = ocpp::DateTime();
+    event_data.eventNotificationType = EventNotificationEnum::HardWiredNotification;
+    this->notify_event_req({event_data});
+}
+
 void Diagnostics::stop_monitoring() {
     monitoring_updater.stop_monitoring();
 }