Security
These instincts watch for something happening rather than a level drifting. Both fire on the moment it happens, and both raise a full alarm by default, because a possible break-in and a burst pipe are a different sort of problem to a tank that needs topping up.
If you have more than one sensor fitted, the alarm and the Log entry name which one fired.
The alarm clears itself when the sensor goes quiet. Movement stops, or a leak sensor dries out, and the alarm it raised goes with it. Before this, a knock lasting a minute and a half left an alarm re-sounding every five minutes for the rest of the afternoon, and clearing it by hand was the only way to stop it.
They are not the same colour, because they are not the same problem. A vibration alarm is amber: worth going out to look, but nothing is being damaged while you decide. A water leak is red, because something is.
The vibration instinct watches for the change, not the state. It does not go off when you switch it on, and it does not go off when your system restarts, even if the sensor happened to be reporting at the time. An alarm you did not cause is an alarm you learn to ignore.
Water is deliberately the other way round. Wet is a condition, not a moment, so if your system starts up and a leak sensor is already wet, it tells you. Staying quiet because it did not see the water arrive is not something a leak alarm should do.
Vibration detected
Movement picked up by a vibration sensor, which usually means somebody is interfering with the van, or it is being towed.
The alarm tells you which sensor fired and suggests checking the vehicle for signs of tampering.
It only sounds while the van is in the Sentry scene. A knock while you are aboard in Work or Movie is life, not an intrusion, so the alarm is armed only when you have left the van in Sentry. The Security tile still shows Detected or Clear whatever scene you are in, so you can always see what the sensor is picking up. An alarm raised in Sentry still clears itself if you switch scene before the sensor settles.
A leak is not treated this way. Water is doing damage whatever the van is being used for, so the leak alarm sounds in every scene.
How easily it trips
A vibration sensor has a sensitivity, running from 1, the most sensitive, to 21, the least. Open Settings, choose the Devices tab, tap the cog on the sensor's row, and set Sensitivity. If it is picking up ordinary movement as you drive, raise the number. If it misses somebody leaning on the van, lower it.
The sensor cannot tell Sensa what it is currently set to, so the box shows the last value set here. A blank box means it has never been set, which is not the same thing as being set to 21.
Settings: none on the instinct itself. Sensitivity is set on the sensor's own row, above. The alarm is armed by the Sentry scene.
Default: Alert.
You need: a vibration sensor, such as the Aqara Vibration Sensor, added over Zigbee.
Water leak detected
Moisture picked up by a leak sensor, which usually means a burst pipe, a failed joint, or water getting in from outside.
A leak sensor is worth putting where a leak would do the most damage before you noticed it: under the sink, beside the water pump, under the fridge, and in any locker carrying plumbing. The alarm names the sensor, which is what tells you where to look.
Settings: none.
Default: Alert.
You need: a water leak sensor, such as the Aqara Water Leak Sensor or the SONOFF Zigbee Water Leak Sensor, added over Zigbee.
Geofence
The van has moved further than you allow from where it was parked when you put it in Sentry, which usually means it is being towed or driven away. It raises a red alarm titled Van moved, and clears itself once the van is back inside the circle or you leave Sentry.
It runs on your Sensa unit off the van's own GPS, so it keeps watching with no internet. You need a connection only for the alert to reach a phone that is away from the van.
The map. The Habitation Security tab shows the van on a map with the circle round it. A van with its own GPS gets the tab for this map even with no security sensors fitted. Before Sentry is on, the circle is dashed around the van, so you can see how big it will be. The map needs the internet to draw, but the geofence does not: with no connection the map is blank and the distance and status beside it stay correct.
To draw it, the screen you are looking at sends the van's position to Sensa's map service, as the Cab dashboard's map already does.
Settings: Circle size, 50 to 5000 m, starting at 200 m.
Default: Alert.
You need: a GPS fitted in the van, such as a Teltonika router.
Smoke detectors
A Shelly Plus Smoke detector shows on the Habitation Security tab as a tile reading Smoke or Clear, turning red when it detects smoke. There is no smoke instinct yet, so Sensa does not raise an alarm of its own: the detector sounds its own siren, as it would without Sensa.
It runs on a battery and sleeps most of the time, and while it is asleep Sensa cannot find it. To add one, press its test button to wake it, then scan for devices and add it while it is awake.