D21 and D20 (A7 & A6) are analog inputs only. Use a different pin than A6 or A7.
Where did you get the idea that delay() takes a float data type. It does not.
Your diagram leaves a lot to be desired. How to create a schematic.
D21 and D20 (A7 & A6) are analog inputs only. Use a different pin than A6 or A7.
Where did you get the idea that delay() takes a float data type. It does not.
Your diagram leaves a lot to be desired. How to create a schematic.