Ardurover 2.51 sonarrange on APM2.8

i was trying to send the pingsonar data on mission planner at sonarrange but it is always zero i have set the param according to their original website yet the data is not being shown what is the issue ,On terminal it is disaplying garbage values.?what is the issue i tried i2c now i tried uart still same sonarrange and sonarvoltage is 0???/

Terminal hasn’t functioned in many years. With that relic of a flight controller try an equally old version of Mission Planner.
Or better yet replace the Flight Controller.

and why is that sonarrange always zero i have connected the sonarping sensor correctly and have set the rng setting correctly?

No idea. Last time I used an APM was many years ago.