Data acquisition from USB temperature sensor in background function

I have temeprature sensor which communicates with usb port. I have written function temp_init() in which connection is created and infinite while function where temperature value is saved to text file RS.txt.

s=serial('COM2','BaudRate',19200,'InputBufferSize',89,'Terminator',12);
fopen(s);

(...)

T=zeros(1);
temp=0;
while(temp<1000)  
    w=fscanf(s); %string with date, time, temperature etc
    T=str2double(w(5:8)); %taking only temperature value        
    save('RS.txt', 'T', '-ascii');
end
fclose(s);

I want this function to run in background of my GUI program created with appdesigner.

Is it possible, and if so how?