Mudança de biblioteca gráfica para PyQtGraph na interface

Interface/Graph.py

-import matplotlib.pyplot as plt
-import numpy as np
-import time
-import serial #importacao do modulo serial
-import random
-leitura =[]
-fig, ax = plt.subplots()
-ser = serial.Serial('COM6') #abre porta serial COM6 
-
-contador = 0
-eixo_x = 50
-while True:
-    while (ser.inWaiting()==0):    
-     pass
-    dados  =int( ser.readline()[:-1])    #firmware deve ter um delay de pelo menos 100ms entre cada envio
-    print dados
-    ax.clear()
-    ax.set_xlim([0,eixo_x])   #faixa do eixo horizontal
-    ax.set_ylim([0,1023]) # faixa do eixo vertical   
-    #leitura.append(random.randint(0,1023))  #teste com numeros aleatorios
-    leitura.append(dados)  
-   
-    ax.plot(leitura)
-    plt.pause(.000001)     
-    contador = contador + 1
-    if (contador > eixo_x):
-	   leitura.pop(0)
-
-ser.close()

Interface/SerialGraph.py

+from pyqtgraph.Qt import QtGui, QtCore
+import pyqtgraph as pg
+import time
+import numpy as np
+import serial
+
+ser=serial.Serial('/dev/ttyUSB0',115200)
+app = QtGui.QApplication([])
+win = pg.GraphicsWindow()
+p1 = win.addPlot()
+curve1 = p1.plot()
+
+readData = [0]
+y1=[]
+x1=[]
+tim=[]
+dt=0
+t=time.time()
+indx = 0
+
+def update():
+    global curve1, indx, y1,x1,t,dt
+    dt=time.time()-t
+    while (ser.inWaiting() == 0):
+        pass
+    readData= float(ser.readline())
+    print(readData)
+    y1.append(readData)
+    x1.append(dt)
+    if indx>50:
+       y1.pop(0)
+       x1.pop(0)
+       indx=0
+    else:
+       indx+=1
+
+    curve1.setData(x1,y1)
+    p1.setXRange(0, 100, padding=0)
+    app.processEvents()
+
+timer = QtCore.QTimer()
+timer.timeout.connect(update)
+timer.start(0)
+
+
+
+
+if __name__ == '__main__':
+    import sys
+    if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_'):
+        QtGui.QApplication.instance().exec_()
\ No newline at end of file

README.md

@@ -6,7 +6,7 @@
 <h4> Biblioteca HX711 do Arduino (https://github.com/bogde/HX711) </h4>
 <h4> Bibliotecas Python: </h4>
 <ul> 
-	<li>  Matplotlib: https://matplotlib.org/ </li>
+	<li>  PyQtGraph: http://www.pyqtgraph.org/ </li>
 	<li>  Numpy: http://www.numpy.org/ </li>
 	<li>  PySerial: https://github.com/pyserial/pyserial </li>
 </ul>