To add a wireless sensor to your ADT alarm, you use the official ADT+ app enrollment path: open the app, ensure the system is disarmed, and follow the in-app pairing workflow from the Devices screen. This process lets you expand your home security coverage without needing a service call or running wires.
How to add a wireless sensor to your ADT alarm
The official method for adding a wireless sensor to your ADT alarm is through the ADT+ app. Before you begin, the system must be disarmed. If you tap the plus (+) icon on the Devices screen while the system is armed, the app will prompt you to enter your security code to disarm it first.
- Open the ADT+ app and log in to your account.
- Navigate to Devices, then tap the (+) icon.
- Select ADT Device, then choose Sensors & Detectors, and finally select Motion Sensor.
- Follow the in-app pairing steps provided after making this selection.
- After the sensor connects, name the sensor in the app to identify its location.
Prepare the wireless sensor for pairing
Before the sensor can connect, you must physically prepare it. Make sure the ADT Base is powered on and located in the same room as the sensor during this process.
- Unlock the sensor by sliding the back cover so the tab aligns with the line on the side of the sensor.
- Separate the cover from the mounting plate.
- Insert a CR123A battery, ensuring correct polarity as indicated inside the compartment.
- Close the sensor by pressing the cover until it clicks and locks into place.
- Wait for the light on the sensor to flash blue. This blue flashing light signals the sensor is ready to connect. The sensor light flashes blue when it is ready to connect, and you then tap Connect in the app.
- Tap Connect in the ADT+ app to complete the pairing.
Troubleshooting sensor connection
If the sensor does not appear in the app or fails to connect, use the blue tamper button located on the sensor. Press and hold this button for 5 to 10 seconds to wake the sensor and initiate the pairing mode. Additionally, verify that the ADT Base remains powered on and is in the same room as the sensor, as distance or obstructions can interfere with the wireless signal.
Frequently Asked Questions
Can I add wireless sensors to my ADT alarm myself?
Yes, you can add wireless sensors yourself using the ADT+ app and the steps outlined above. No professional installation is required for this process.
Does the ADT system support multiple wireless sensors?
ADT alarm systems are designed to support multiple wireless sensors, allowing you to customize coverage for doors, windows, and rooms throughout your property.
What if my system is armed when I try to add a sensor?
If the system is armed, the ADT+ app will ask you to enter your security code to disarm it before you can add a new device. The system must remain disarmed throughout the pairing process.
How do I change battery in ADT panel if a sensor runs low?
To change battery in ADT panel or a wireless sensor, unlock the sensor cover, replace the CR123A battery with correct polarity, and close the sensor until it clicks. The app will typically notify you when a battery is low.
Does the ADT+ app support location tracking and NFC features?
The ADT+ app focuses on security system control and sensor management. For location tracking and NFC features, separate devices and guides are available, but the sensor enrollment process itself does not use these functions. iPhone requirement for ADT Control: iOS 15.0 or later.
