I use a MB 1200 sonar for my arducopter. I test the sonar in CLI mode. But I observed that the sonar reading is always around 608cm when I put the arducopter on the table. After that I detach the sonar from the arducopter but maintain the three wires conneted to the imu shield. I move the sonar only around and the reading did not change much, 1cm at most.
I enabled the sonar in CLI mode. What is the problem? Can anyone help? Thanks