换行

The wordwrap() function wraps a string into new lines when it reaches a specific length.

将符串按符个数换行。

For text-mode files, carriage return–linefeed pairs are counted as single characters.

对文本模式的文件，回车换行作为一个符。

Serial.print(b, BYTE) prints b as a single byte followed by a carriage return and a linefeed.

以单个出b，同一个回车和换行符。