# ToF v2 ground level error

Source: https://forum.modalai.com/topic/3517/tof-v2-ground-level-error
Category: ESCs, Sensors and Accessories (https://forum.modalai.com/category/15/escs-sensors-and-accessories)
Tags: image-sensor
Posted: 2024-06-01 15:34:01 UTC by Gyeongmin Kim
Replies: 2 · Views: 781

## Gyeongmin Kim · 2024-06-01 15:34:01 UTC

Hello there!
I've been trying to change the depth sensor from ToF v1 to v2 because it is't supported anymore. And I've connected ToF v2 on voxl2 successfully. 
But I have been encountering the critical error about the ground level.
The left red line is showing the pointcloud from the ground. As you can see, the level of ground is higher than the bottom of wall. I think it should be connected with the bottom of wall.
![Screenshot from 2024-05-30 19-50-33.png](https://forum.modalai.com/assets/uploads/files/1717066243413-screenshot-from-2024-05-30-19-50-33.png) 
I've tried the same experience with ToF v1 at the same place and time. It's showing the same ground level as I expected.
![Screenshot from 2024-05-30 19-46-58.png](https://forum.modalai.com/assets/uploads/files/1717066026188-screenshot-from-2024-05-30-19-46-58.png)
May I have any comment about it? Thank you!

## Reply by Gyeongmin Kim · 2024-06-11 06:09:20 UTC

Any update?

## Reply by Moderator (ModalAI staff) · 2024-06-11 09:09:11 UTC (in reply to Gyeongmin Kim)

@Gyeongmin-Kim We don't have any great insight at this point. Those sensors are new. It looks like you are seeing some ghosting. You could try different frame rates or exposure times to try and minimize the artifacts