Store status info from minigrid

[jmbott]

From sectors 4-16,

In the future used for feedback on webpage.

[vr2262]

For my own reference:

Bytes:
1 some kind of id (e.g. 1)
2 some kind of id (e.g. 7)
3-4 some kind of length
5-14 timestamp
15 newline
then (all in ascii) per outlet
outlet identifier (starting with 1)
comma
kWh
comma
credit
newline
cutting off at outlet identifier 18?