matplotlib으로 EMF 찍어보기, http://www.instructables.com/id/Arduino-EMF-Detector/

emf_in_matplotlib.py

import time
import numpy as np
import matplotlib.pyplot as plt
import serial

sr = serial.Serial('/dev/tty.usbmodem1421',9600)

plt.axis([0, 1000, 0, 256])
plt.ion()
plt.show()

x,y = range(1, 1001),[]
start = time.time()
while True:
    try:
        value = int(sr.readline())
        if len(y) >= 1000:
            y.pop(0) # to remove the first item
        y.append(value)
        plt.scatter(x[0:len(y)], y)
        plt.draw()
        time.sleep(0.05)
        end = time.time()
        if end-start > 10:
            break
    except:
        continue