How to Install a SimpliSafe Home Alarm System

On this page (8 sections)

1. What do you need before starting a SimpliSafe home alarm installation?
2. Where should the base station and keypad go?
3. How do you pair the base station and keypad?
4. How do you place entry sensors on doors and windows?
5. Where do motion sensors work best?
6. How do glassbreak sensors and the auxiliary siren fit in?
7. How do you test the system and set up alerts?
8. What should you check after the simplisafe home alarm installation?

Set up the SimpliSafe base station first, then add each sensor in the SimpliSafe app as you place it. Peel-and-stick mounting means most of the simplisafe home alarm installation is placement and pairing, not wiring.

The order matters more than the speed. Get the base online and the keypad paired, then walk the house one room at a time so every device lands in the right zone.

What do you need before starting a SimpliSafe home alarm installation?

Gather the base station, keypad, sensors, power adapter and the SimpliSafe app before you place anything. A screwdriver and a ladder help for wall mounts and high corners.

Unbox each device and check that the included batteries are seated. The glassbreak sensor, motion sensor and auxiliary siren each ship with batteries, so you don't need to buy them separately.

The glassbreak sensor runs on a single lithium metal battery rated for about 4 years, and the motion sensor also takes one included lithium battery. The auxiliary siren takes four AA batteries, also included.

Clear a spot for the base station near the center of the home and near an outlet. Avoid closets and metal cabinets, which can block the signal the sensors send to the base.

Keep the quick start card handy. It lists the pairing steps for each device type, and the app repeats them when you add a sensor.

Where should the base station and keypad go?

Put the base station in a central, open spot on a shelf or mounted on a wall, close to power and away from the floor. Place the keypad near the main entry you use most.

The base is the hub every sensor talks to, so central placement shortens the path for signals from far rooms. Keep it off the floor and out of direct sun.

The keypad belongs inside the door you arm and disarm from daily. Mount it at a comfortable height, clear of the door swing, so you can reach it fast.

Both devices use the included hardware or sit freestanding where the design allows. Run the base's power adapter to the outlet before you start pairing, and leave the backup battery in place.

How do you pair the base station and keypad?

Power the base, open the app and follow the add-device steps to link the base to your account. Then pair the keypad so it arms and disarms the system.

The app walks you through connecting the base to your WiFi network. If your plan includes cellular backup, the base also uses that connection when WiFi drops, which is why the base's location matters so much.

Set your entry delay and master PIN during this step. Pick a code you'll remember, and write it down somewhere secure rather than leaving it on the keypad.

Test the keypad by arming and disarming once. If the base doesn't respond, move it or check the outlet before going further.

Our guide to WiFi vs cellular alarm systems explains what each connection covers.

What to do when a device won't pair

If the app can't find a sensor, start with the battery. Open the battery compartment and make sure the included battery is seated and any protective tab is pulled.

Then bring the sensor close to the base and run the add-device step again. Signal distance is the usual culprit when a device that paired in your hand won't report from its final spot.

If it still fails, remove the device from the app's device list and start the pairing steps from the beginning. A clean re-add clears the stale entry that can block a second attempt.

How do you place entry sensors on doors and windows?

Mount entry sensors on the frame and the moving panel, with the two halves lined up and close together when the door or window is shut. Clean the surface, peel the backing and press firmly.

Place the larger half on the frame and the smaller half on the door or window itself. The gap between them should stay small when closed, so the sensor reports an open as soon as the panel moves.

Test each one by opening and closing the door while the system is armed in test mode. If a sensor doesn't trip, the halves may be too far apart or the surface too rough for the adhesive.

Skip doors that get heavy daily traffic for adhesive-only mounting if the surface is uneven. The included screws give a firmer hold there.

Where do motion sensors work best?

Put motion sensors in corners at about 7 feet, aimed across the room rather than at a window or a doorway you walk through. The SimpliSafe Motion Sensor covers a 90 degree field of view and detects motion within 30 feet.

The corner position catches movement across the widest part of the room. Avoid aiming the sensor at heating vents, sunlit windows or pets' favorite paths, which can set it off without an intruder.

The sensor is pet-friendly and ignores pets under around 50 lbs, so a large dog may still trigger it. Place it where a big pet won't cross the detection path when the system is armed.

Mount it with the adhesive pad, on a shelf or with the included hardware. Pair it in the app after placement so the zone name matches the room.

For more placement help, see how to install a home alarm system yourself.

How do glassbreak sensors and the auxiliary siren fit in?

Add a glassbreak sensor near windows with large panes and an auxiliary siren where an intruder would hear it first. Both pair in the app like the other sensors.

The SimpliSafe Glassbreak Sensor listens for the sound of breaking glass up to 20 feet away. Mount it on a wall or shelf with a clear line to the window, not behind curtains or blinds that muffle the sound.

It detects the sound of breaking glass rather than the glass itself, so it works even when the window is covered by a shade.

The SimpliSafe 105dB Auxiliary Siren adds a loud indoor or outdoor alarm to the system. Its weather-resistant design suits sheltered spots outside, like under an eave, and it mounts with adhesive or screws.

The siren measures about 3.1 inches long, 1.13 inches wide and 5 inches high, so it fits on a narrow strip of wall.

Keep the siren out of reach and away from spots where rain hits it directly. Pair it last, after the sensors, so you can hear the main siren during testing without the extra noise.

The weather-resistant build is meant for sheltered areas, so a spot under an overhang protects it better than an open fence line.

How do you test the system and set up alerts?

Run a test of every zone, then arm the system and confirm alerts reach your phone. The app's test mode lets you trip each sensor without calling for help.

Open and close each protected door and window in turn. Walk past each motion sensor and clap or use the test button for the glassbreak sensor if the app offers one.

Sound-based detection means a sharp clap near the sensor is the usual way to trip it during a test.

Check that the SimpliSafe app sends a notification for each event. Adjust the entry delay if you need more time at the door.

Confirm the base's backup battery is charged, so a power cut doesn't take the system offline. Our guide to home alarm system battery backup covers how long backup power lasts.

What should you check after the simplisafe home alarm installation?

Recheck every zone, the base's connection and the keypad code once the system has run for a day. Small fixes now save false alarms later.

Look at the app's device list and confirm each sensor shows as connected. Rename any zone that's unclear so an alert tells you exactly where the trigger happened.

Test the keypad's panic button and the siren volume with the family at home. Walk the house and listen for spots where the siren is hard to hear.

The auxiliary siren's 105dB rating is loud enough to carry through the house and alert the neighborhood, so check the far rooms and the yard.

If your internet is unreliable, read does SimpliSafe work without WiFi to understand what still works during an outage. That check is worth doing before you rely on phone alerts alone.

Frequently asked questions

Do I need tools to install a SimpliSafe system?

Usually no. The sensors, siren and keypad use peel-and-stick adhesive, and the base station sits on a surface or mounts with the included hardware.

You may want a screwdriver for wall mounting and a ladder for high spots.

How long does a SimpliSafe home alarm installation take?

Plan about an hour for a base station, keypad and a handful of sensors. A larger house with motion sensors, glassbreak sensors and an auxiliary siren takes longer, mostly because you place and pair each device one at a time.

Does SimpliSafe need WiFi to work?

The base station can run on its cellular connection when WiFi drops, depending on your plan. See our guide on whether SimpliSafe works without WiFi for the details before you pick a spot for the base.

Can I move SimpliSafe sensors after installing them?

Yes. The adhesive mounts can be removed and the sensor re-paired in the app, though adhesive pads may need replacing.

Place sensors carefully the first time so you don't move them more than necessary.

What should I do after installing the sensors?

Test every zone from the keypad or app, arm and disarm the system, and check that alerts reach your phone. Confirm the base station's backup battery is charged before you rely on the system.