Ping360 returns None value

unfortunately I only have a linux system with ubuntu 20.04 on it right now. afaik it needs >ubuntu 22.04.

i could try putting the unit in water to see if it returns any value but right now, in air, its returning none.

also as per this post Is the Ping360 sonar signal harmful to humans? - #2 by EliotBR it cannot work in air? im not sure what that means