How Does Roomba Know When To Stop: 5 Essential Elements?

One of the fascinating points that make the Roomba such an excellent favorite of many users is, undoubtedly, its independence. With just one click on the “Clean” button, the robot will automatically complete the cleaning job and find a way to come back home.

But how does Roomba know when to stop? Lots of people are still curious to know about its smart automation. 


How Does Roomba Know When To Stop?

Five essential elements are contributing to the automation of the Roomba. They include sensors, room mapping, virtual wall/lighthouses, full bin indicator, and low battery charge. 

Roomba Sensors

Typically, a Roomba vacuum owns a system of inbuilt sensors helping the device do many tasks. Among them, front and bumper sensors, cliff sensors, and dirt sensors are three main parts that let the Roomba know when to stop.  

Front and Bumper Sensors

The manufacturer places the sensors at the top and underneath the robot to produce infrared beams. This emission plays its role in detecting obstacles and walls ahead. 

For being touch-sensitive sensors, they can estimate the size of the room. Thanks to this estimation, the device figures out how long it may take to clean the whole room

And when this amount of time runs out, and the device does not detect any dust, it will stop. For the automation, you do not need to waste lots of time paying attention to and control the Roomba. 

Cliff Sensors

Another type of sensor underneath the Roomba is the cliff sensor. Like the front and bumper sensor, this sensor also emits infrared beams to detect steep areas. For instance, when moving near staircases, the vacuum will stop automatically and change its direction. 

These sensors prevent the device from falling from a high position or getting stuck on an uneven surface. Consequently, it does not have to suffer strong bumps, which can affect the device’s longevity. 

Dirt Sensors

To detect dirty areas, the Roomba needs dirt sensors. Especially, it tends to spend more time staying and cleaning the place with lots of dirt. When the vacuum does not detect any dirt, it will go back to the home base and stop working. 

Sometimes, there is too much dust on the floor that the robot works as if it would never stop. In this case, the Roomba will know when to stop thanks to other features that we love to mention below. 

Roomba Room Mapping

Not the sensors only, the Roomba also features an excellent technology named VSLAM, standing for Vision Simultaneous Localization and Mapping. The hi-tech advance enables the vacuum to do its task more efficiently. 

Instead of cleaning randomly, the Roomba vacuum cleaner has its strategy of using beacons and cameras. After taking photos of the rooms needed to clean, the robot will build your home map. Thanks to this mapping, the Roomba knows where to clean and where not to.

Consequently, the cleaning will go faster and more efficiently. Based on the map, the robot will stop automatically and go back to its base when the cleaning gets done. 

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Virtual Wall and Lighthouses

In addition to the sensors and mapping, there is another helpful point letting the Roomba know when to stop. They are virtual walls and lighthouses. Generally, this feature is available for most Roomba models nowadays. 

Via the lighthouses, infrared beams come and help the Roomba to detect where the room transition is. Hence, the robot will not move to other rooms until it cleans thoroughly its one. 

Besides, by activating the virtual wall function, you will keep the robot away from certain barricaded areas. For instance, to prevent the Roomba from disturbing your sleep, we suggest setting up a virtual wall for your bedroom. So, the device will stop once it stands in front of the bedroom. 

The smarter the Roomba is, the more functions it can offer like mapping and storing memories of room location, safe, and more. Furthermore, the modern design allows you to program the robot for different days weekly and particular rooms. 

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Bin Full Indicator

The most important task of a vacuum cleaner is to make rooms clean. However, it cannot get anything done when its bin becomes too full to accommodate more trash. 

Hence, the full indicator is also an indispensable part. If the indicator makes some notification, the Roomba knows that it is time to stop. 

The indicator light of standard robotic vacuum cleaners often blinks or beeps at the same time when the dustbin is full. But a wi-fi enabled Roomba to stay at a higher level since it can send an alert to your smartphone. Next, the device will stop cleaning and waiting for you to empty the bin. And after cleaning up the dustbin, you press the Clean button to continue the robot. 

Low Battery Charge

Assuming the Roomba is out of battery, what will happen? Well, there is no doubt that it will stand still like an iceberg and do nothing. Tons of smart functions of the modern vacuum cleaners make no sense, then. 

At the time when the battery power is running low, the front infrared sensors start working. It will find the way to the device charging base and stop cleaning for a while till the battery gets full. 

Normally, the recharging time of a Roomba robot is about a couple of hours. And then, based on your set-up, the device will head back after recharging to make your house clean.  

Read: Shark Steam Mop Not Steaming – Easy Fixing Tips And Tricks!


Finally, we get the answer to the question, “How does Roomba know when to stop?”. The smart technologies applied for this smart vacuum cleaner helps house cleaning more effectively and quickly than ever. 

Will you decide to buy a Roomba robot? For us, we definitely can’t wait to pick one.

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