uint_fast8_t
CHECK_UTYPE(uint_fast8_t, UINT_FAST8);
SNPRINTF_TEST("4294967295", "%wf8u", (uint_fast8_t)UINT_MAX);
SWPRINTF_TEST("4294967295", "%wf8u", (uint_fast8_t)UINT_MAX);
uint_fast8_t short_retries; /* RTS/CTS retries */
uint_fast8_t long_retries; /* ACK retries */