In the string to confirm whether the space occupied by its actual length +1, so special print a little,
#define DEFAUTL_PWD "12345678"
mqtt_debug("%d\r\n", sizeof(DEFAUTL_PWD));
Print result: 9
In the string to confirm whether the space occupied by its actual length +1, so special print a little,
#define DEFAUTL_PWD "12345678"
mqtt_debug("%d\r\n", sizeof(DEFAUTL_PWD));
Print result: 9