OSDK 3.9 ROS version with A3/N3/M600 , get the value of height_above_takeoff is always 0?

Keywords: TOPIC_HEIGHT_FUSION, height_above_takeoff

The telemetry TOPIC used by height_above_takeoff in the ROS demo is TOPIC_HEIGHT_FUSION. This TOPIC does not support A3/N3/M600, only M210. Therefore, the value obtained on A3/N3/M600 is 0.

In addition, the TOPIC: TOPIC_HEIGHT_FUSION obtains the relative ground height, and the relative ground height <10m is valid. Vision and ultrasonic sensors cannot be simulated in the simulator, and the actual value can only be obtained in real flight.

Note: This article is from Chinese and is translated by machine. If there is any suggestions, please point it out and we will correct it in time