Then If not understand is necessary put a delay somewhere correct ? But from Arduino side i know how to maybe using delay function.
delay(1000);
but from php side how i can do ? could you give kindly me a tip ? in order to proceed with sense and in the right way ?
at least a simply code example to follow for sycronize trasmission from php and the answer from arduino ...
Thanks 1000 for your help gnusso