Code for multiple HC-SR04 ultrasonic sensors.

Projects Programming
1

Hi guys and girls.

Straight off I'll admit that I am not a sketcher or coder or whatever the term is. I can understand logic to a degree but cant write stuff like you lot do. However, I do know the power of codes and the Arduino family of boards.

I am seeking help on developing the most effective code to utilise 8 x HC-SR04 ultrasonic sensors in an octaganol formation to alert of obstacles. Needless to say this is for UAV protection and I don't need accurate distance measurments, I just need to set up somethiong that creates an alert when an object is detected by one or more of the sensors. This is early days and I'm still working on what the alert will subsequently do but I would like to get going on early testing with some good code.

I should point out that I am a qualified Ultrasonic operator so I am reasonably familiar with the principles of UT but my expertise is very much in manually pushing a probe and reading a cathode ray tube type screen - yes, old school - I know!

To date I have aquired 8 x HC-SR04 sensors and I have built a circuit board that places the sensors at 45 degrees to each other around a radius of 110mm. The HC-SR04 is specified as being a 15 degree beam angle but I suspect that this could be +/- a bit. Regardless, the area of coverage is acceptable. I would, ideally like to trigger a "transmit" pulse to all sensors and read an "echo" pulse if there is one and define from which quadrant the echo has been received. I am so thick that I don't even know how to display the fact that an echo pulse has been received.

If anyone can stop laughing long enough to help me then I would be truly grateful.

Sol

2

Start with an example sketch using one. Next try to add a second one.

I'm not sure if you can trigger all at the same time; they might interfere with each other and hence you might get incorrect results.

PS, what is UAV?

3

Needless to say this is for UAV protecti

Needless?

4

I am so thick that I don't even know how to display the fact that an echo pulse has been received.

Fortunately, the NewPing library can handle multiple sensors for you. Look at the examples that come with the library.

5

Thanks for responses. I'll take a look at the NewPing library and see if it helps.

BTW - UAV = Unmanned Aerial Vehicle (drone). I need to stop bumping into things :wink: