Arduino plot graph using Python

In this video, I have demonstrated how to interface Arduino with Python and how to read the analog signal from Arduino and plot it.

This video is suitable for those who need to show real-time plotting with Arduino and python using matplotlib library.

Watch "Real Time Plotting Arduino and Matlab" :

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[Barty.Crowell]

The music is so loud that it's difficult to hear what you're saying

[bennguyen]

I'ld like for Python to read a line from the serial port, which contains 3 values, then a carriage-return..

but before plotting the 3 values, I'd like python to always add an offset to one of values.

How could I do that? Is tkinter or pyqt necessary, or can I use only matplotlib? drawnow?

ex.
import serial

ser = serial.Serial('COM3', baudrate = 9600, timeout=1)


Data =

[shilpagunari]

Sir it asking for please select a code before upload what do I do sir

[CerineKhoo-lzxg]

Why did I ended up produce multiple graph and each graph only show a point ?

[foreverdiego]

thx!!! it is very helpful. but i have a little problem.
I am communicating through bluetooth and i have a lot of lag in readings. it's stuck and it plots a single value. do you have some advice?

[sebasA]

How Can I make the same but with a linear graph?