HTU31_SERIAL_NUMBER_LEN
u8 sn_buf[HTU31_SERIAL_NUMBER_LEN + HTU31_SERIAL_NUMBER_CRC_LEN];
crc = crc8(htu31_crc8_table, sn_buf, HTU31_SERIAL_NUMBER_LEN, HTU31_CRC8_INIT_VAL);
memcpy(data->serial_number, sn_buf, HTU31_SERIAL_NUMBER_LEN);
u8 serial_number[HTU31_SERIAL_NUMBER_LEN];