Unit	Office (jp)	Kitchen (eos)
AMY
BOB
CY
DAN
ED
FLO
GUY

Steps used during testing:

Test Procedure:
1) attach USB to unit
2) edit the /dev/ttyt field
3) Save
4) Kernel restart
5) cell 1 run (Ctrl+Enter)
6) cell 2 run
7) cell 3 run

On the final test, ED, the blue charging light was activated, I noted in the screenshot.
I then went back and plugged each unit in to determine if the charging light appears:
	AMY - no
	BOB - no
	CY - yes
	DAN - no
	ED - yes
	FLO - no
	GUY - no

The blue charging light will activate within 2 seconds of connecting the USB.