Anyone help with this NODELUA module and motor drive combo? http://www.esp8266.com/u/espmotor I think it uses a ST L293 driver?? What code can driver steppers? Arduino help? Schematics?
https://learn.adafruit.com/adafruit-arduino-lesson-15-dc-motor-reversing/overview might be of use to you. I do not have anything with L293D, but it seems really simple to use. Check https://www.arduino.cc/documents/datasheets/H-bridge_motor_driver.PDF also for the specsheet.
If this is the one I have it might be no good for steppers. The four pins to control the outputs are enablea, enableb, directiona and directionb.