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Adding warning about multiple open files.
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@ -38,7 +38,8 @@ void setup()
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}
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Serial.println("initialization done.");
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// open a file:
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// open the file. note that only one file can be open at a time,
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// so you have to close this one before opening another.
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myFile = SD.open("test.txt", FILE_WRITE);
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// if the file opened okay, write to it:
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