Online and offline
A device is online if it has sent data in the last 3 hours. Otherwise it is offline and shown in gray. Emma sends less often when it's parked; see the Emma Smart Tracker collection.
Status colors
Signal checks these in order and uses the first that matches:
Gray: offline.
Red: the temperature is outside an alert limit.
Green: on an active route.
Neutral: no temperature alert set.
Green: within its limits.
Limits can come from the device's own alert, an active route and any group the device belongs to. When several apply, Signal uses the strictest: the highest minimum and the lowest maximum.
Battery levels
High (green): 50 % or more.
Medium (orange): 20–49 %.
Low (red): below 20 %.
A warning icon: below 5 %. Replace the batteries soon.
Data refresh
Signal fetches new data every minute. You don't need to reload the page.