ygreq:
Hi tuxduino,Yes! I am very sure! Actually everything works (send to serial via Serial.print, send to an LCD following the same logic) except sending to that 7-segment module.
I am pretty sure that the answer is somewhat related to tm1637.display(0,inputString[0]); and how it is created in the first place.
I don't think the second parameter of tm1637.display() is an ASCII char.