unsigned int ArrayKey[68] = {30868,8900,4400,600,500,600,...,600};
irsend.sendRaw(ArrayKey,68,38);

unsigned int ArrayKey[68] = {strtok(readString, ",")};

char *tmp;
int i = 0;
tmp = strtok(readString, ",");
while (tmp) {
   ArrayKey[i++] = atoi(tmp);
   tmp = strtok(NULL, ",");
}