Add support for requestTime()

[tsathishkumar]

Add feature to respond for requestTime calls from nodes.

[tsathishkumar]

@flatsiedatsie I have added the feature in the latest commit. Could you do a round of testing and let me know if it works. Thanks.

[flatsiedatsie]

I will!

[flatsiedatsie]

My alarm clock node does not seem to pick up the time :-(

I couldn't find any code in the project relating to "I_TIME"?

I had a look at the documentation, and it seems a time request will be something like.

*; (NODE_ID)
*; (CHILD_ID)
3; (internal request)
0; (if we request an ACK or not)
1; (I_TIME type: the time is being requested)

It should return "local time adjusted for DST."

[flatsiedatsie]

Hey, wait, I think it works now!

The time seems to be one hour off?

pi@gateway:~ $ date
Thu Nov 29 15:00:10 CET 2018

But the time on the alarm clock says 14:00.

Perhaps it's a summertime/wintertime thing?

[tsathishkumar]

I assume so. I think the time sent by the controller is UTC and UTC is 1 hr behind CET.