Robin2 : this exactly i want. not the screen change instantly. i want to change with all the step of 20 rpm or 50 rpm. i am glad to understand what exactly i want. thanks for reply. if you cant help me please. i try many things and nothing changes. is that difficult or impossible to do this? i think not but i dont know. i am open to try and different codes. thanks again!!!
cattledog : i try it without the drawPercentbar and nothing changed. i think the oled is fast enough because i try it with a potentiometer with a map 0 to 8000 and changed very fast. so my opion is that the oled is fast enough for this. tell me if i was wrong. thanks!!!