Serial.find() reads data from the serial buffer until the target is found or it times out.
The function returns true if target is found, false if it times out.
The find() function finds them there after the 500 millis delay.
Serial.find() inherits from the stream utility class.
Serial .find(target)
Serial .find(target, length)
Serial : serial port object. See the list of available serial ports for each board on the Serial main page .
target : the string to search for. Allowed data types: char .
length : length of the target. Allowed data types: size_t .
Data type: bool .
LANGUAGE stream
LANGUAGE stream.find()