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diff --git a/low-can-binding/diagnostic/diagnostic-message.hpp b/low-can-binding/diagnostic/diagnostic-message.hpp
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+/*
+ * Copyright (C) 2015, 2016 "IoT.bzh"
+ * Author "Romain Forlot" <romain.forlot@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *	 http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <vector>
+#include <string>
+
+#include "uds/uds.h"
+#include "../can/can-message-set.hpp"
+#include "../can/can-message.hpp"
+#include "active-diagnostic-request.hpp"
+
+enum UNIT {
+	POURCENT,
+	DEGREES_CELSIUS,
+	KPA,
+	RPM,
+	GRAMS_SEC,
+	SECONDS,
+	KM,
+	KM_H,
+	PA,
+	NM,
+	INVALID
+};
+
+class can_message_set_t;
+
+/// @brief - A representation of an OBD-II PID.
+class diagnostic_message_t
+{
+	private:
+		can_message_set_t* parent_; /*!< parent_ - Pointer to the CAN message set holding this diagnostic message */
+		uint8_t pid_; /*!< pid_ - The 1 byte PID.*/
+		std::string generic_name_; /*!< generic_name_ - A human readable name to use for this PID when published.*/
+		int min_; /*!< min_ - Minimum value that can take this pid */
+		int max_; /*!< max_ - Maximum value that can take this pid */
+		enum UNIT unit_; /*!< unit_ : Which unit system is used by that pid. See enum UNIT above.*/
+		float frequency_; /*!< frequency_ - The frequency to request this PID if supported by the vehicle when automatic, recurring OBD-II requests are enabled.*/
+		DiagnosticResponseDecoder decoder_; /*!< decoder_ - An optional DiagnosticResponseDecoder to parse the payload of responses
+											 * to this request. If the decoder is NULL, the output will include the raw payload
+											 * instead of a parsed value.*/
+		DiagnosticResponseCallback callback_; /*!< callback_ - An optional DiagnosticResponseCallback to be notified whenever a
+											   * response is received for this request.*/
+
+		bool supported_; /*!< supported_ - boolean indicating whether this pid is supported by the vehicle or not.*/
+
+	public:
+		const char* generic_name = generic_name_.c_str();
+		diagnostic_message_t(uint8_t pid, const std::string& generic_name, const int min, const int max, enum UNIT unit, float frequency,
+											DiagnosticResponseDecoder decoder, DiagnosticResponseCallback callback, bool supported);
+
+		uint32_t get_pid();
+		const std::string get_generic_name() const;
+		const std::string get_name() const;
+		float get_frequency() const;
+		DiagnosticResponseDecoder get_decoder() const;
+		DiagnosticResponseCallback get_callback() const;
+		bool get_supported() const;
+
+		void set_supported(bool value);
+		void set_parent(can_message_set_t* parent);
+		const DiagnosticRequest build_diagnostic_request() const;
+
+		bool is_obd2_response(const can_message_t& can_message);
+		bool is_obd2_request(const DiagnosticRequest *request);
+};