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Update enable_i2c.markdown (#16073)

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Co-authored-by: Franck Nijhof <frenck@frenck.nl>
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Adam Outler 2021-01-16 16:21:11 -05:00 committed by GitHub
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@ -12,7 +12,7 @@ You will need:
- SD card reader
- SD card with Home Assistant Operating System flashed on it
### Step 1 - Access the Home Assistant OS boot partition
### Step 1 - Access the Home Assistant Operating System boot partition
Shutdown/turn-off your Home Assistant installation and unplug the SD card.
Plug the SD card into an SD card reader and find a drive/file system named
@ -44,3 +44,24 @@ and make sure the first partition is available.
present at boot time.
The I2C devices should now be present under /dev.
## From Home Assistant Operating System Terminal
Alternatively, by attaching a keyboard and screen to your device, you can access the physical terminal to the Home Assistant Operating System.
You can enabled i2c via this terminal:
- Login as `root`.
- Type `login` and press enter to access the shell.
- Type the following to enable i2c, you may need to replace `sda1` with `sdb1` or `mmcblk0p1` depending on your platform:
```shell
mkdir /tmp/mnt
mount /dev/sda1 /tmp/mnt
mkdir -p /tmp/mnt/CONFIG/modules
echo -ne i2c-dev>/tmp/mnt/CONFIG/modules/rpi-i2c.conf
echo dtparam=i2c_vc=on >> /tmp/mnt/CONFIG/config.txt
echo dtparam=i2c_arm=on >> /tmp/mnt/CONFIG/config.txt
sync
reboot
```