on ESP32 stepper only turns one way

[marc kerger]

HI

I tried using stepper and Accelstepper  on a ESP32 ( a ttgo t-display to be precise) but strangely the stepper will only turn one way. 

I use pins 12,13,15, 2 on In1-4 of a small ULN2003 driver breakout board.

if i drive the stepper without a library all works ok. 

Is there some incompatibility with the pins?

thanks

[marc kerger]

ok i found a solution.

the wiring order must be : in1, in3 in2 in4.