Thank you rmackay9 for your answer.
I obyed the wiki, so i set RNGFND_MAX_CM to 120cm and i found that value reasonable. Above 120cm the lidar doesn’t work anymore at normal reflection of the ground.
Honestly, i don’t know how to find such messages in a log, so here it is for you:
Edit: There seems to be an issue uploading a 20MB file. Doesn’t work. Sorry.
Is there a way to shrink the size of a log, so that upload works ?