storing data from delayed source

[SteveDH]

I'd like to log data from my smart meters.
I can only reliably capture data that is a few hours old.
Is there a way I can capture 8 hour old data and set the timestamp correctly when adding it to the rrd file?
thanks
Steve

[Osiris]

Just push the date in time order into the rrdfile. Use boost, it does not care about time.

[SteveDH]

I presume then I need to compensate for that when I come to display the data
--edit--
oops I read date as data. I thought that but using the cati interface I can't see how to specify the date... I'll look a bit harder.