fixed a problem with undefined variables

micropython_firmware/main.py

@@ -2,7 +2,7 @@ import machine
 import sys
 from machine import I2C, Pin
 
-i2c = False
+i2c = True
 if i2c:
     import d1motor
 else:
@@ -13,14 +13,13 @@ import usocket
 import esp
 
 class Robot:
-    def __init__(self):
+    def __init__(self, i2c=True):
         if i2c:
             print("setting up I2C ...")
-            #d1 = Pin(5)
-            #d2 = Pin(4)
-            #i2c = I2C(scl=d1, sda=d2)
-            #i2c_scan = i2c.scan()
-            i2c_scan = []
+            d1 = Pin(5)
+            d2 = Pin(4)
+            i2c = I2C(scl=d1, sda=d2)
+            i2c_scan = i2c.scan()
             if len(i2c_scan) > 0:
                 i2c_addr = i2c_scan[0]
                 print("i2c scan = {}".format(i2c_addr))