To convert and append an integer, use operator += (or member function concat ): String stringOne = "A long integer: "; stringOne += 123456789;. ... <看更多>

Arduino : Convert string into char array in Arduino ?Helpful? Please support me on Patreon: https://www.patreon.com/roelvandepaarWith thanks ... ... <看更多>

a constant string of characters, in double quotes (i.e. a char array); a single constant character, in single quotes; another instance of the String object; a ... ... <看更多>

Direct answer. F() takes immutable string literals, that are known at compile time, and places them into flash ("PROGMEM") instead of RAM. ... <看更多>

Hardware independent layer of the Arduino cores defining the official API ... explicit String(unsigned int, unsigned char base=10);. explicit String(long ... ... <看更多>