Plot edit text input gui in real time

Hello,

I am developing a GUI display to be used for real-time data acquisition. So, in short, I have edit text box where I manually add a value following a push button, that i want to get the value and plot in real time (now). After some time I want to repeat the data input and push the same button and add to the plot the new value, and so on... Moreover, I would like for this plot to begin when I start the acquisition (xlim [t0 elapsed_time])

Can you help me?

Thank you mafalda