I think something wrong with my tello. When I fly the drone indoor it always move backward without given any input to move backward, but when I i try to fly it outdoor it working well. Any know what going wrong with my tello?
I don't think there is anything wrong if it works outside in daylight. Tello relies on a down pointing camera to stabilise itself and recent Tellos seem less sensitive in low light than earlier ones, and so don't perform as well inside in dim lighting conditions.
EDIT: It also needs a strong pattern underneath it, a single colour carpet may also confuse it.