I now understand your meaning. As far as I can tell, the order is well send (as it works in 1.4.4 and 1.5.5 version of px4). Also by using the version 1.7.0, I know that the order is received because if I change the Z position request, the autopilot tries to reach this Z setpoint. Also, I know that the UAV does not consider itself in the landing states : with version 1.4.4 and 1.5.5, with the same Order, the UAV was gently descending at the speed resquested in the parameters, with px4 version 1.7.0 (same offboard software used with 1.4.4. and 1.5.5), the UAV stays at the last Z setpoint requested (in my case it is always 2,5 meters above ground level)
But you gave me an idea : perhaps I was not correctly using the landing bitmask and should indicates to the autopilot to ignore the Z setpoint. I'll let you know whether this works
Can you help me (by showing me a discussion thread or tuto) how to enable this particular log you mention ?