Method c_str

Code/Arduino_libraries/SSD1306/OLEDDisplay.h:52–52

	String(const char *s) { _str = s; };
	int length() { return strlen(_str); };
	const char *c_str() { return _str; };
    void toCharArray(char *buf, unsigned int bufsize, unsigned int index = 0) const {
		memcpy(buf, _str + index,  std::min(bufsize, strlen(_str)));
	};