several characters for serial communicatoon

Forum 2005-2010 (read only) General Frequently-Asked Questions
1

Hi,

When I sent a chain like 'azrty' from my computer to the arduino, i receive it character per character on the arduino.

how to have it in one 'block' to analyse it in the arduino code ??

thanks

seb

2

You'll have to read it character by character. There is no direct serial read functio that reads a completer string or line of text. Declare an array of characters, big enough to hold your text plus a '\0' for end-of-string, than use an index to fill it up, one character at a time.

3

//read a string from the serial and store it in an array
//you must supply the array variable - will return if timeOut ms passes before the sting is read so you should
//check the contents of the char array before making any //assumptions.
void readSerialString (char *strArray,long timeOut)
{
long startTime=millis();
int i;

while (!Serial.available()) {
if (millis()-startTime >= timeOut) {
return;
}
}
while (Serial.available() && i < serInLen) {
strArray = Serial.read();

  • i++;*
  • }*
    }