Hello Nam, As I've said before, I do have a smart meter, and I have the downloaded 1/2 hourly usage data, from 22/1/2016, up until the last time I did it, 3rd April this year. In case it helps clear things up, the device type specified in my 56k rows of data, is MRIM. The meter was installed when our home was built, in 2014. Now where do I go? Thanks, maca99