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diff --git a/src/low_can_client.hpp b/src/low_can_client.hpp
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+/*
+ * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
+ *
+ * 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.
+ */
+
+#ifndef TMCAGLWM_LOW_CAN_CLIENT_HPP
+#define TMCAGLWM_LOW_CAN_CLIENT_HPP
+
+
+#include <vector>
+#include <json-c/json.h>
+
+
+namespace wm {
+
+class LowCanClient {
+
+public:
+    explicit LowCanClient();
+    ~LowCanClient() = default;
+
+    void initialize();
+    void analyzeCanSignal(struct json_object *object);
+    bool isChangedCarState();
+    bool isChangedLampState();
+    const char* getCurrentCarState();
+    const char* getCurrentLampState();
+
+private:
+    // Disable copy and move
+    LowCanClient(LowCanClient const &) = delete;
+    LowCanClient &operator=(LowCanClient const &) = delete;
+    LowCanClient(LowCanClient &&) = delete;
+    LowCanClient &operator=(LowCanClient &&) = delete;
+
+    const int kNumEvent_ = 4;
+    const std::vector<const char*> kEventName_{
+        "vehicle.speed",
+        "transmission_gear_position",
+        "headlamp_status",
+        "parking_brake_status"
+    };
+
+    int vehicle_speed_;
+    int trans_gear_pos_;
+    json_bool park_brake_status_;
+    json_bool headlamp_status_;
+
+    std::string prv_car_state_;
+    std::string crr_car_state_;
+    std::string prv_lamp_state_;
+    std::string crr_lamp_state_;
+
+    bool is_changed_car_state_;
+    bool is_changed_lamp_state_;
+};
+
+} // namespace wm
+
+
+#endif  // TMCAGLWM_LOW_CAN_CLIENT_HPP