did some testing with custom hardware

src/UI/UI_item.cpp

@@ -168,3 +168,8 @@ void UI_item::can_send(uint32_t id, uint8_t dlc, std::array<uint8_t, 8> payload)
     UNUSED(dlc);
     UNUSED(payload);
 };
+
+void UI_item::can_clear()
+{
+
+}

src/UI/UI_item.hpp

@@ -51,6 +51,7 @@ class UI_item : public QObject
     virtual void set_selected(std::string selected);
     virtual void set_value(double value);
     virtual void can_send(uint32_t id, uint8_t dlc, std::array<uint8_t, 8> payload);
+    virtual void can_clear();
 
   signals:
     void value_changed();

src/UI/custom/UI_can.cpp

@@ -24,13 +24,13 @@ UI_can::UI_can(const json &j, QObject *parent) : UI_item(UI_CAN_TYPE, parent)
     from_json(j);
 }
 
-void UI_can::add_send_message(QCanBusFrame& msg)
+void UI_can::add_send_message(QCanBusFrame msg)
 {
     m_can_send_messages.push_back(msg);
     emit value_changed();
 }
 
-void UI_can::add_received_message(QCanBusFrame& msg)
+void UI_can::add_received_message(QCanBusFrame msg)
 {
     m_can_received_messages.push_back(msg);
     emit value_changed();
@@ -48,6 +48,12 @@ void UI_can::clear_receive_buffer()
     emit value_changed();
 }
 
+void UI_can::can_clear()
+{
+    clear_send_buffer();
+    clear_receive_buffer();
+}
+
 void UI_can::from_json(const json &j)
 {
     UI_item::from_json(j);

src/UI/custom/UI_can.hpp

@@ -12,8 +12,8 @@ class UI_can : public UI_item
     UI_can(Color fg_color, Color bg_color, QObject *parent = nullptr);
     UI_can(const json &j, QObject *parent = nullptr);
 
-    void add_send_message(QCanBusFrame& msg);
-    void add_received_message(QCanBusFrame& msg);
+    void add_send_message(QCanBusFrame msg);
+    void add_received_message(QCanBusFrame msg);
     void clear_send_buffer();
     void clear_receive_buffer();
 
@@ -21,6 +21,7 @@ class UI_can : public UI_item
     json to_json(size_t id) const override;
 
     void can_send(uint32_t id, uint8_t dlc, std::array<uint8_t, 8> payload) override;
+    void can_clear() override;
   signals:
     void on_send(QCanBusFrame msg);
   private: