Feature: increase resolution

[jaxxzer]

Send 1000+ samples instead of a fixed 200

[wangshujun-tj]

For Low-speed serial ports, delays of more than 1000 data will exceed 100 ms. It's not cost-effective.

At present, the beam angle of Ping sonar is 30 degrees, so it is meaningless to improve the resolution. If we expect a higher resolution, we need to further improve the frequency of sonar, so that the beam angle is small enough to be meaningful.