Some smoothie powered boards do not have enough spare electrons to power multiple smart steppers. So I finally gave up and shoe horned in a buck regulator on the board. While I was in there I went ahead and added a dedicated enable pin with level shifting and level shifting on the TX/RX pins as well.
Of course the NEMA 23 boards already had these options as well..
We are also looking at creating a lower cost version of the board without the connectors and LCD populated.
All smart stepper orders will be shipped with new hardware, so order now.