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Author Topic: Using millis() to get elapsed time  (Read 8590 times)
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Seattle, WA USA
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I think it is only a 4 digit integer number that i am sending, Well here is the code,
The print()/println() methods convert the value to a string. Suppose that millis() returns a value of 873. You are then sending '8', '7', '3', <CR>, <LN> to the serial port.

You are then reading one character at a time, '8', '7', '3', <CR>, and <LF>, and assuming that you are getting an integer value ('8' != 8), which is not the case.

The Serial class in Processing has a bufferUntil() method, where you can tell Processing to call serialEvent() only when the <CR>, for instance, arrives.

In the serialEvent() method, you can then use the readUntil() method to get all the data (as a string) that has arrived ("873") up to the specified character (<CR>). Then, int() will convert that string to an int.

Dublin, Ireland
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I am trying to solve this on the Processing forum. Here is a link in case it is of any interest to anyone.

I have also included a Fritzing schematic.



* Photogate.fzz (3.35 KB - downloaded 24 times.)
« Last Edit: October 07, 2012, 04:58:45 pm by ofey » Logged

Those who say it can't be done are usually interrupted by others doing it.

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