/* @方法1 */ String kPath
kPath = "/some_static_code_here/plus?"; kPath += macstr; char kURL[50]; kPath.toCharArray(kURL, 50); Serial.println(kURL);
/* @方法2 */ char kPath[128];
kPath[0] = 0; strcat(kPath, "/some_static_code_here/plus?"); strcat(kPath, kAnotherParameter);
Serial.println(kPath);