volker@28: example lidar
volker@28: LDRtrue, LDRmin, LDRmax
volker@28:  0.0040, 0.0011, 0.0086
volker@28:  0.0200, 0.0158, 0.0252
volker@28:  0.1000, 0.0891, 0.1078
volker@28:  0.3000, 0.2726, 0.3143
volker@28:  0.4500, 0.4104, 0.4689