Merge pull request #83 from mores/missedStep

Adds link back to "The First Boot" in case i2c bus is not found

Author: FDelporte

content/documentation/io-examples/i2c/_index.md

@@ -43,6 +43,13 @@ i2c-11	i2c       	107d508200.i2c                  	I2C adapter
 i2c-12	i2c       	107d508280.i2c                  	I2C adapter
 ```
 
+If you are not seeinging i2c-1, then you might have missed a few steps in [The First Boot](../../../prepare/first-boot.md).
+The specific line needed to enable i2c is:
+```shell
+root@rp5:~# raspi-config nonint do_i2c 0
+```
+
+
 Command line tool to immediately scan the standard addresses on I2C bus 1 (i2c-1)
 ```
 root@rp5:~# i2cdetect -y 1