CJMCU 891 Sonar Board

Hey all,

I have one of these sensors:

ebay.co.uk/itm/311139739778

Hooked it up, and configured the Sonar type to “analog”, and while it does seem to work - I get distance values that look ‘OK’ in mission planner, Land mode does not detect landings and disarm any more.

Has anyone successfully used this type of sensor with APM?