How can I know the AR.Drone's height in order to control it?

asked 2015-04-08 05:24:28 -0600

saikishor
228 ●8 ●15 ●17

I tried for getting the value of "altd" in /ardrone/navdata and what ever the position of the drone and even the state of drone like flying, landing, landed.. etc the "altd" value is always zero. I want to use this value for many things so please someone help me in getting the height of the drone.

Below is the screenshot of navdata of my drone when subscribed to /ardrone/navdata topic:

http://i58.tinypic.com/29wr2au.png

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What is the firmware version of the AR-Drone? Is it AR-Drone 1.0 or 2.0?

Mani ( 2015-05-15 21:31:32 -0600 )edit

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answered 2017-01-04 02:10:18 -0600

jayess
6155 ●26 ●85 ●92

I believe that you can get altitude data even if it is not in flight by subscribing to the /ardrone/navdata_altitude topic. You will have to modify the ardrone.launch file so that the enable_navdata_pressure_raw parameter is set to true. Just copy and paste this:

<param name="enable_navdata_pressure_raw" value="true" />

and add it between the <node> and </node> tags of the launch file. In order to use this data you will have to include the navdata_altitude message/datatype and access it in your callback function using data.altitude_raw.

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Wow, that sounds cool and I think it will work. Thank you. It is helpful.

saikishor ( 2017-02-19 08:38:05 -0600 )edit

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answered 2015-06-05 16:05:45 -0600

saikishor
228 ●8 ●15 ●17

It will only publish altitude data after takeoff operation

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How can I know the AR.Drone's height in order to control it?

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How can I know the AR.Drone's height in order to control it?