Serial.readBytesUntil() reads characters from the serial buffer into an array. The function terminates if the terminator character is detected, the determined length has been read, or it times out (see Serial.setTimeout()). The function returns the characters up to the last character before the supplied terminator. The terminator itself is not returned in the buffer.
Serial.readBytesUntil() returns the number of characters read into the buffer. A 0 means no valid data was found.
Serial.readBytesUntil() inherits from the Stream utility class.
Syntax
Serial.readBytesUntil(character, buffer, length)
Parameters
Serial: serial port object. See the list of available serial ports for each board on the Serial main page.
character : the character to search for (char)
buffer: the buffer to store the bytes in (char[] or byte[])
length : the number of bytes to read (int)
Returns
size_t
Notes and Warnings
The terminator character is discarded from the serial buffer.
We care about the privacy and personal data of our users.
To continue, please give us your consent:
Please confirm that you have read the privacy policy
Thank you for subscribing!
Curious to learn more?
Are you also a teacher, student, or professional that loves using Arduino in your day-to-day activities?
Then keep up-to-date with either our STEM or Professional monthly newsletters.
Arduino weekly newsletter (already subscribed)
Educators can benefit from the ever growing tech that shapes our environment through fun cool projects.
Why not awe your boss with highly innovative ways to help keep your enterprise connected at no extra cost?
Arduino Survey
We'd like to get to know you little better.
Please help us improve by answering this super short optional survey.
