Hi all,

Just bought ArduPilot with Oil sensor board together and thinking about obstacle avoidance and strongly  need advices:

1.  HC-SR04 will be good?

2. There's also 3-pin version of it. Looks like it has serial communication, is it the better way? It's just sending bytes in fixed interval. Does this the future system requires at least 5 serial ports (4 sides + bottom)? is it possible to arrange them only using free pins on Pilot and Oil boards?

3. Or, maybe, It's better to buy 4-pin analog sensors and connect them to free alanogReads?

4. Any other suggestions?

 

I'm good in javascript programming, so I'm not afraid of Processing. I'm just curious if serial communication could make it much easier.

 

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