2

I'm trying to perform a simple analogRead() and print out the result, as below:

void getVoltMeter() {

  readValue = analogRead(A2);
  readByte = readValue/4; 
  Serial.println(readValue);
  Serial.println(readByte);

}

But the output is:

023
255

The voltage input is 5V, so I would expect it to read:

1023
255

Why is the first digit being cut off?

7
  • 1
    What board are you using?
    – Majenko
    Aug 23, 2017 at 21:02
  • What does it look like if you swap order of the println() commands? Aug 23, 2017 at 21:07
  • What happens if you add a Serial.println() first?
    – Majenko
    Aug 23, 2017 at 21:33
  • 1
    josecanuc: if I swap the print commands, it reads "4, 1024" @Majenko I'm using an Uno. If I put a blank print statement first, it prints the values as expected without truncation, so this is a solution. I mostly just want to understand what's going on that would make this happen.
    – janizer
    Aug 24, 2017 at 17:17
  • 1
    In the serial monitor
    – janizer
    Aug 24, 2017 at 17:34

0

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