avoidance collision prevention disabled

[Cliff Wong]

Hi there, looks like there's some confusion with what mode is being tested. Here's some clarification. PX4 has 2 approaches to handling obstacle distance data:
a. Obstacle Avoidance(OA) feature which stops the aircraft if object detection occurs from the voxl-voa service. This requires CP_* parameters set that you can compare with your drone listed here based on your application.

b. Collision Prevention(CP) feature, which not only includes OA, but also rerouting capability in all autonomous modes (position, alt, mission, offboard) and leverages the same voxl-voa service. This requires not only the CP_* parameters but also requires COM_OBS_AVOID = enable.

If your application requires (a), you can leave com_obs_avoid = disable and OA should work out of the box as is. If your application requires (b), then we have discovered a software bug in the VOA service. And the main reason you get the "collision module not ready", no arm possible. It has been corrected [code here] and binaries will be available in our gitlab daily builds shortly.