Hello, thanks for an hardware donation from Dany Qumsieh, I have been able to work on better support for the LiDE 210. I have improved scanning speed at resolution below 600 (saving about 8s), and in the process improved darkness issue with this scanner (#313886). Incorrect gray scans geometry has also been fixed. However, since the motor of the LiDE 100 and 210 can't work at very low resolution, the gray scans show some "staircase effect" due to the fact that scan is done at a higher resolution, and lines discarded to match the real target. I hope to alleviate this by enabling true gray on these sensors.
Regards, Stef