…continuing from previous post
Login to LibreELEC as root and make the modifications to config.txt
The file is located /flash/config.txt and on a "volume that is mounted as read only. Follow these instructions to unmount and remount as writable volumne.
Now edit /flash/config.txt with the first set of instructions per the original instructions
# Added the support DLP2000
LibreELEC does not have a raspi -conf utility, so If you have to enabled I2C on your Pi by adding the following line to the /flash/config.txt file, not sure if spi needs to be on, but I turned it on.
#enable i2c for projector
Next you need to edit or create the equivalent of the /etc/rc.local file. For LibreELEC the file is /storage/.config/autostart.sh
add the i2cset commands here. You might need to change the permission of the file to r+x as well.
Now check if the i2cset command exists in you system, by invoking i2cset without any parameters. Typically it not there. Then you need to go to Kodi and install system-tool add-on which has the i2cset command.
Once you install it, try running i2cset command again from the root login and the help page should show up.
Then you are good to go. Go Luck.