Adrian  writes:

> I'm having problems with i2c, and after a couple of hours trying all
> the options that Google throws up, I'm stumped.
>
> Pi 3 4.14.79-v7+
>
> sudo i2cdetect -y 1
> Error: could not open file '/dev/i2c/1': No such file or directory

It's interesting, I've never user i2c on my RPi (3+) but after enabling
it via raspi-config (didn't reboot) I have /dev/i2c-1 but not
/dev/i2c/1. So why the difference?

> cat /etc/modules
> i2c-bcm2708
> i2c-dev

Why i2c-bcm2708? I have only i2c-dev in /etc/modules. i2c-bcm2708 isn't
loaded but i2c-bcm2835 is.

> tail /boot/config.txt
>
> dtparam=i2c=on
> dtparam=i2c_arm=on
> dtparam=i2c_vc
> device_tree_param=i2c=on1=on
> dtparam=spi=on
> dtparam=i2s=on

Of these I have only dtparam=i2c_arm=on.

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