"The block diagram from AADC manual is like this.
The show models may be build based on this concept. There is some difference in CPU board and sensor."
"Recent consumer drones have flow control and sonar for non GPS environment. We need low cost updated flow control sensor other than old PX4flow. Is MIT licensing a reason not to accept this OpenMV vision sensor for our candidate? "
"@naish, exactly! I am googled and found JRC NJR4233D sensor that FSK Doppler mode is prepared for measurement speed and distance. Maximum distance is 30meter in 16.7cm accuracy.
Link is here, sorry for Japanese page."
"I found something like this.
Haiwang Brand Microwave Radar Sensor Module (HW-M09)
This product is automatic induction control of doppler radar products.High sensitivity, long distance detect, high reliability, big detect angle. Also the power…"