SMBus error on first startup

Hi SDL forums,

Trying to get the GWPi working after wiring everything up to a PiZeroW. On running the script, I get the following error: (I assume 'I2C Mux Not Present' is normal?)


root@raspberrypi:/home/pi/SDL_Pi_GroveWeatherPi# python GroveWeatherPi.py

>>>>>>>>>>>>>>>>>>><<<<<<<<<<<

TCA9545 I2C Mux Not Present

>>>>>>>>>>>>>>>>>>><<<<<<<<<<<

Traceback (most recent call last):

File "GroveWeatherPi.py", line 262, in <module>

weatherStation = SDL_Pi_WeatherRack.SDL_Pi_WeatherRack(anemometerPin, rainPin, 0,0, SDL_MODE_I2C_ADS1015)

File "./SDL_Pi_WeatherRack/SDL_Pi_WeatherRack.py", line 200, in __init__

self.ads1015 = ADS1x15(ic=ADS1015, address=0x48)

File "./SDL_Adafruit_ADS1x15/SDL_Adafruit_ADS1x15.py", line 138, in __init__

self.i2c = Adafruit_I2C(address)

File "./SDL_Adafruit_ADS1x15/Adafruit_I2C.py", line 43, in __init__

self.bus = smbus.SMBus(busnum if busnum >= 0 else Adafruit_I2C.getPiI2CBusNumber())

IOError: [Errno 2] No such file or directory


Any thoughts? Thanks in advance