IOError: [Errno 2] No such file or directory

[neilyoung]

While running

sudo python cali_server.py on a Pi3

I'm getting this:

pi@raspberrypi:~/Sunfounder_Smart_Video_Car_Kit_for_RaspberryPi/server $ sudo python cali_server.py 
offset_x = 11
offset_y = 0
offset = 0
turning0 = True
turning1 = True
Traceback (most recent call last):
  File "cali_server.py", line 176, in <module>
    setup()
  File "cali_server.py", line 47, in setup
    video_dir.setup(busnum=busnum)
  File "/home/pi/Sunfounder_Smart_Video_Car_Kit_for_RaspberryPi/server/video_dir.py", line 34, in setup
    pwm = servo.PWM(bus_number=busnum) # Initialize the servo controller.
  File "/home/pi/Sunfounder_Smart_Video_Car_Kit_for_RaspberryPi/server/PCA9685.py", line 113, in __init__
    self.bus = smbus.SMBus(self.bus_number)
IOError: [Errno 2] No such file or directory

i2cHelper gives:

pi@raspberrypi:~/Sunfounder_Smart_Video_Car_Kit_for_RaspberryPi $ sudo python i2cHelper.py

   ====================================
   ||                                ||
   ||     Raspberry Pi I2C check     ||
   ||        and setup tools         ||
   ||                                ||
   ||                     SunFounder ||
   ====================================

   Checking your Pi's information.
Traceback (most recent call last):
  File "i2cHelper.py", line 148, in <module>
    main()
  File "i2cHelper.py", line 89, in main
    you_i2c_bus_number = getPiI2CBusNumber()
  File "i2cHelper.py", line 45, in getPiI2CBusNumber
    raise ValueError("Error occur while getting Pi Revision. Revision:{0}".format(revision))
ValueError: Error occur while getting Pi Revision. Revision:2a02082
pi@raspberrypi:~/Sunfounder_Smart_Video_Car_Kit_for_RaspberryPi $ 

I added my revision to i2Chelper.py

RPI_REVISION_3 = ["a02082", "a22082", "2a02082"]

Result:

pi@raspberrypi:~/Sunfounder_Smart_Video_Car_Kit_for_RaspberryPi $ sudo python i2cHelper.py

   ====================================
   ||                                ||
   ||     Raspberry Pi I2C check     ||
   ||        and setup tools         ||
   ||                                ||
   ||                     SunFounder ||
   ====================================

   Checking your Pi's information.
   Your cpu revision: 2a02082
   Your Raspberry Pi is Revision 3
   Your I2C bus number is: 1

   Checking your device...
   I2C has not been setup.

   Backup... done
   Setting i2c... done
   I2C has set. It would change after reboot.
   Do you want to reboot now?(y/n) y
   Your Raspberry Pi will be reboot in 5 second.
    5
    4
    3
    2
    1
    0
   Rebooting...

Maybe you fix that too