I am using a 28BYJ-48 (5V) with a A3967 driver. I have loaded the slave board firmware on to an Arduino Uno. Per this instruction, is it absolutely necessary to cut the red line? If so why? Can I just leave it disconnected? Also, I have connected the slave board and my config looks like this:


G4 RPM_Eng1 s=3

Observing the TX and RX leds on the uno, I don't see any data being transmitted over the serial bus. Am I missing a step?

Oct 2, 2019 in Output - Stepper by

1 Answer

Best answer
I was able to get this working. I needed to reload the firmware on to the slave and as the docs instruct, "Make sure you power the stepper with 5v exactly"
Oct 3, 2019 by