Hi. I bought TM1637 6-digit display from aliexpress, and it seems that two digits no work? or I don't know all what need..
As I can see in many threads, others have similar problems too, buying from China .
Digit 4 (from left) never turn ON.
Digit 5 show always 11, whatever I do with code..
The numbers are always inverted and shufled, ex. if I set in code to show 123456, it will show 543....
(On back side TM1637 is a strong green led light, don't know why is always turned ON).
Using arduino nano, pins 2 and 10, after try on A4 and A5, is the same..(scl,sda).