The documentation says that a serial buffer is 128 bytes: Serial.available() - Arduino Reference The Arduino programming language Reference, organized into Functions, Variable and Constant, and Structure keywords. The code declares it as 16 or 64 bytes. htt…

Documentation bug - size of serial buffer - #5 by system - Suggestions for the Arduino Project

Topic		Replies	Views	Activity
Serial communication and size of the serial buffer Development	2	1174	May 6, 2021
why is my serial buffer just 40bytes? Syntax & Programs	3	944	May 6, 2021
uart buffer length 127 not 128 bytes Bugs & Suggestions	3	2300	May 6, 2021
Serial port receive buffer issue Troubleshooting	7	5173	May 6, 2021
Arduino Zero Serial buffer size Zero	5	2775	May 6, 2021