This typically happens when the Smoke + Carbon Monoxide Alarm with smart features is offline.

Note that a “Lost contact” alert will be sent to your preferred choice of communication (Email, Push Notification, SMS) within 10 minutes of your device losing the internet connection.

If an action is tried during this 10-minute period, it is expected to receive a message “Command failed to reach device”. It is recommended to check the connection of your device and router and try again.