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Author Topic: 2 ultra sonic sensor questions  (Read 300 times)
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Hey all, I'm a beginner at this arduino course.

I have a few question to ask.

If I have 2 ultra sonic sensors, I want 2 use this sensors to measure how fast people are walking. What code do I need to calculate the time when someone walk pass my first sensor to my second sensors

Thanks
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I don't think you connected the grounds, Dave.
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You need code to note what time it was when they walked past the first sensor (millis ()), then the time when they walked past the second.
You need a constant to let your software know what the distance between your sesnors is.
How you figure out if it's the same person is your problem   smiley-wink
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