Error:Could not open file `/dev/i2c-1': No such file or dire - Raspberry Pi Forums

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hello,
have recentry bought raspberry pi 2 model b noobs , when run command "sudo i2cdetect -y 1" response get:

error: not open file `/dev/i2c-1' or `/dev/i2c/1' : no such file or directory.

have tried have seen in other forums problem seems not work me:
https://learn.adafruit.com/adafruits-ra ... guring-i2c
http://skpang.co.uk/blog/archives/575

welcome,
thank much

see http://www.raspberrypi.org/forums/viewt ... 28&t=97314

summary

add 1 or more of following /boot/config.txt , reboot.

i2c
add dtparam=i2c1=on (or dtparam=i2c0=on on old models)

spi
add dtparam=spi=on

i2s
add dtparam=i2s=on

lirc-rpi
add dtoverlay=lirc-rpi
add module parameters end of dtoverlay line,
e.g. dtoverlay=lirc-rpi,gpio_in_pin=16,gpio_in_pull=high

w1-gpio
if require external pullup
dtoverlay=w1-gpio-pullup,gpiopin=x,pullup=y
otherwise
dtoverlay=w1-gpio-pullup,gpiopin=x
(where x , y gpios).

audio card
add 1 of following
dtoverlay=hifiberry-dac
dtoverlay=hifiberry-dacplus
dtoverlay=hifiberry-digi
dtoverlay=iqaudio-dac
dtoverlay=iqaudio-dacplus

heartbeat led
dtparam=act_led_trigger=heartbeat


raspberrypi



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