decimal numbers in arduino serial

Hi how can I print decimal numbers with decimal point in serial arduino like (1234.23) :'( I wroten this sketch but i cant write numbers with decimal point like 342.23

void setup() { Serial.begin(9600); Serial.setTimeout(10);

}

void loop() { char buffer[] = {' ',' ',' ',' ',' ',' ',' ',' ',' '}; // Receive up to 8 bytes while (!Serial.available()); // Wait for characters Serial.readBytesUntil('n', buffer, 8); double incomingValue = atoi(buffer); Serial.parseFloat(); Serial.print(incomingValue,DEC); }

please guide me

atoi == ASCII to int(eger)

May you explain more details?

An integer is a whole number - no fractional part.

Try running the following line, with n=0,1,2,3,4 and 5.

Serial.println(1.23456,n);

Serial.print(incomingValue,DEC); Expecting ten decimal places from a 32 bit float is a bit of an ask.

farsad: Hi how can I print decimal numbers with decimal point in serial arduino like (1234.23) :'( I wroten this sketch but i cant write numbers with decimal point like 342.23

void setup() {
 Serial.begin(9600);
 Serial.setTimeout(10);
}

void loop() { char  buffer[] = {' ',' ',' ',' ',' ',' ',' ',' ',' '}; // Receive up to 8 bytes while (!Serial.available()); // Wait for characters Serial.readBytesUntil('n', buffer, 8); double incomingValue = atoi(buffer); Serial.parseFloat(); Serial.print(incomingValue, DEC); }




please guide me

Why are you looking for an 'n' in your input? Why are you doing a .parseFloat() and throwing away the result? I think what you want is more like:

void loop() {
  while (!Serial.available()); // Wait for characters
  double incomingValue = Serial.parseFloat();
  Serial.print(incomingValue);
}

Many thanks to all of you