@Anis_Koubaa wrote:
Hello
To takeoff an arducopter using any MAVLink ground station, I noticed that it was necessary to have a 3D fix for the GPS and the copter must be in GUIDED mode.
However, this is only possible in an outdoor environment to be able to get the 3D fix of the GPS.I wonder if it is possible to takeoff the copter in an indoor environment WITHOUT need to have a GPS fix. Some quadcopters like AR.Parrot drone allow this and estimate the altitude using its ultrasonic sensor pointing to the ground. But, with Arducopter, I could not find this possible.
Do you have any hint to make a copter fly without GPS fix in any mode different from GUIDED? If so, how and what kind of sensor will estimate the altitude?
Thanks
Anis
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