Thanks, Robin2. I have spent all my last week in just to keep received readings straight and put them onto the specific location on their designated TFT LCD boxes. Everything seemed alright but in the middle somewhere a wave of junk comes onto LCD. I was wondering because so far I was thinking that all Serial receive functions are "Blocking" functions, and were focusing only on the strtok and related areas of the code.
The info on Arduino pages are too short and sometimes misleading. As they do not talk things in required depth. I agree no one is paid to do so, but I believe professionals do the professional jobs. No matter they are paid or not, because the work a professional does, does not reflect how much he/she is paid, but it shows how much he loves his work.
I think your posts should be added on to Arduino official pages.
Thanks again.