add webui

Plotter.py

@@ -1,12 +1,20 @@
 from __future__ import division
 import serial
 
+try:
+    from config import plotter_port, plotter_baudrate, plotter_timeout, plotter_center_at_origin
+except ImportError:
+    plotter_port = lambda: '/dev/ttyUSB0'
+    plotter_baudrate = lambda: 9600
+    plotter_timeout = lambda: 15
+    plotter_center_at_origin = lambda: False
+
 
 class Plotter:
 
     def __init__(self, boundaries=None):
         self.boundaries = boundaries
-        self.p0incenter = False
+        self.p0incenter = plotter_center_at_origin()
         if not boundaries:
             s = self.getoutput(b'OW;')
             print(s)
@@ -17,7 +25,11 @@ class Plotter:
 
     def getoutput(self, outstr):
         try:
-            self.ser = serial.Serial('/dev/ttyUSB0', timeout=15)
+            self.ser = serial.Serial(
+                plotter_port(),
+                baudrate=plotter_baudrate(),
+                timeout=plotter_timeout()
+            )
             print('try to get Status')
             if not self.ser:
                 print('Plotter not available')