sprintf(tmp, "s%i\r\n", Item);
write(giCoke_SerialFD, tmp, 4);
sprintf(tmp, "s%i\r\n", Item);
write(giCoke_SerialFD, tmp, 4);
ret = ReadLine(sizeof(tmp)-1, tmp);
printf("ret = %i, tmp = '%s'\n", ret, tmp);
ret = ReadLine(sizeof(tmp)-1, tmp);
printf("ret = %i, tmp = '%s'\n", ret, tmp);