How to change pushbutton colour in Guide without pressing it ?

Question

Karthik Muthineni 2018-2-11

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https://ww2.mathworks.cn/matlabcentral/answers/382001-how-to-change-pushbutton-colour-in-guide-without-pressing-it

评论： Saad Oussaada 2020-3-8

I have a GUI that reads the DHT11 sensor data attached to Arduino. I also have pushbutton in my GUI. Now, how do I change pushbutton colour based on incoming sensor data. For, example if the temperature is below 30 celsius then pushbutton should turn to Green otherwise it should turn to Red.

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Karthik Muthineni 2020-3-7

Hello Saad Oussaada,

You can create GUI in MATLAB. For that type guide command in command editor, and a window will pop-up. From there you can follow this link to create GUI for your case. You can drag and drop pushbuttons, textarea, axes, and many more widgets. Once you select particular widget you need to assign code for it to do particular task. In your case, if you want to read DHT data and display it on graph you can use this piece of code.

% --- Executes on button press in pushbutton1.

function pushbutton1_Callback(hObject, eventdata, handles)

delete(instrfind({'Port'},{'COM6'})); % Serial port of your dht microcontroller

s = serial('COM6');

time=1000;

i=1;

while(i<time)

i=i+1;

fopen(s)

fprintf(s, 'Your serial data goes here')

out = fscanf(s)

Temp(i)=str2num(out(1:2));