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Originally Posted by Donut
Is the frequency easily changable on sonar sensors though? I know you can vary it, but I don't know how easy it is to do that, or if it will effect the performance of the sensor significantly.
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Unfortunately, it's only easily varied on
some designs - usually those you make yourself. Also, there is a resonant frequency for each transmitter, where you get peak efficiency. You can move off that a bit, but not by much - and in thinking about it more, probably not enough to avoid interference.
However, you might be able to avoid interference by knowing when you command a reading, and only 'listening' in the very small window of time that you expect an 'answer'. If you do that 10 times a second, a few readings should be valid. But, which ones....
Maybe modulate the ultrasonic, and only listen to the signal with the correct modulation?
Sorry, I just don't have the expertise to give a better answer.
Don