How do i display real-time water level in tank using serial readings (digital) from Arduino on Matlab GUI

Hello all, I need to read serial data continuously and display it on Matlab GUI. I want to build a simple GUI to display water level in tank. I need to know which things of the .m file need to be updated because I am new to Matlab and its GUI environment. Please help...

Thanks in advance

[Walter Roberson]

Have you put together code that will draw the appropriate plot given a particular input level, without the level of complication of looping reading from arduino ?

[Iemad Sofi]

% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
s = serial('COM3','BaudRate',9600);
out1 = instrfind('Port','COM3');
fclose(out1);
fopen(s);


% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)


% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
delete (handles.figure1);

[Iemad Sofi]

im sorry but i only know this lines of codes. i really need your help to teach me the codes. thankyou.

ps:

A is the maximum level of water. B is the minimum. i only need to display when the tank is max or min.

thanks again

[Walter Roberson]

You probably should not be doing the delete(handles.figure1) . You probably should not be using a second figure at all. The figure you show for gui_cuba.fig should be enough.

ax = axes(handles.axes1);
if ~isfield(handles, 'levelplot')  || ~isvalid(handles.levelplot)
    handles.levelplot = animatedline('Parent', ax);
    title(ax, 'Water Level');
    xlabel(ax, 'time (s)')
    ylabel(ax, 'depth (furlongs)')
    guidata(hObject, handles)
end

current_depth = appropriate value from parameter or from arduino
current_time = appropriate value from parameter or from arduino
addpoints(handles.levelplot, current_time, current_depth);