I have an Amazon smart home plug, am using it with a lamp to replace a digital outlet timer. The timer has an option to randomly vary setting times by up to a half hour so when used as part of home security, it looks more like the home is occupied. Many outlet timers I've used for years have had this so I expected it with Alexa but don't find it. How can this be set?
At this time, Alexa routines cannot be setup to generate random time intervals. If you'd like to express interest in such a feature, feel free to submit your feedback via the Alexa app or the following link:
Check out the GUARD feature on your Alexa. When you tell Alexa "I'm leaving" it will monitor the house for "breaking glass" or "smoke detector" or "CO2 detector" alarms and send you a notification. I know that's not what you want...but wait...there's more!
The GUARD function allows you to set up lights to create a random series of changes that makes it look like someone is home. It also allows you to put in your zip code so that the lights are not on during daylight hours.
Open your Alexa app, select the three lines and select SETTINGS and scroll down until you see Guard, tap that and your options become available.
Hope that Helps.
*** UPDATE ***
I've seen several posts where people are saying that the lights are just turning on one at a time every 3-5 minutes and then just staying on. So you may want to test this while you're home to see what actually happens with your set up.