I have installed the sonar XLL-EZ0 on the quadcopter (3DR). Then I launch a sonar test though the CLI in the mission planner software. The arducopter is connected via USB only (no battery).
The minimum reading with the sonar command is 20 cm. Is this a limit set in the software/firmware or is this a bug ? (Normally the sonar starts measuring at 1 mm according to the product's datasheet).
Thx for advice,