diff -r 612925137029 -r 146874d7bb47 src/DetailCO2meter.h
--- a/src/DetailCO2meter.h	Sat Jul 02 15:45:01 2022 +0200
+++ b/src/DetailCO2meter.h	Sun Jul 03 13:12:22 2022 +0200
@@ -29,6 +29,7 @@
     void on_quitButton_clicked();
     void refreshTable(void);
     void code_changed(int val);
+    void on_ChartButton_clicked();
 
 public slots:
     void refreshCO2meter(QString);