Data logging Arduino Micro + SD Breakout
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Please be positive and constructive with your questions and comments.
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: Data logging Arduino Micro + SD Breakout
You need a capital 'K' in getKey().
-
- Posts: 47
- Joined: Sat Jun 29, 2013 7:42 pm
Re: Data logging Arduino Micro + SD Breakout
Ok i put a capital K, but now i type in numbers nothing shows up in the serial monitor and nothing is saved on the datalog.txt file either.
Code: Select all
void loop()
{
while (kpd.getKey() == NO_KEY) { }
char key = kpd.getKey();
if (key != NO_KEY)
{
if(key) // Check for a valid key.
{
switch (key)
{
case '*':
digitalWrite(ledpin, LOW);
break;
case '#':
digitalWrite(ledpin, HIGH);
break;
default:
Serial.println(key);
}
}
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
File dataFile = SD.open("datalog.txt", FILE_WRITE);
// if the file is available, write to it:
if (dataFile) {
dataFile.println(key); // print your keypad here
dataFile.close();
// print to the serial port too:
Serial.println(key);
}
// if the file isn't open, pop up an error:
else {
Serial.println("error opening datalog.txt");
}
}
}
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: Data logging Arduino Micro + SD Breakout
Actually, if you are using the latest keypad library, it should work without that line. The multiple key-presses you were seeing before were probably due to contact bounce. You can try adding a "delay(100);" instead of that "while" statement.
Please be positive and constructive with your questions and comments.