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uint8_t calc_crc8(uint8_t *buf, uint8_t len) uint8_t crc = 0; for (uint8_t i = 0; i < len; i++) crc ^= buf[i];

: Press Win + X , select Device Manager , and expand the Ports (COM & LPT) section. Look for COM3 , COM4 , etc. serial babacom top

If the pump draws more power than usual, it may indicate a clogged impeller or worn bearings. uint8_t calc_crc8(uint8_t *buf, uint8_t len) uint8_t crc =