Arduino stepper focuser ASCOM driver development help needed - Forums

Topic starter

Frequent contributor

12 days ago

Has anyone built a stepper based focuser using Arduino and ASCOM? I’ve completed the Hardware/Arduino side and it works great but am out of my element when it comes to creating an ASCOM driver for it. I know there’s is an ASCOM template and that commands and data are sent back and forth via serial com but that’s about as far as my knowledge goes. I’ve had a look at the myFP2 project but that seems needless complicated for my needs.

I’m using an Arduino Uno with a 28byj-48 stepper and uln2003 controller board.

Well Written Engaging

Rainer Ots

12 days ago

There is also https://github.com/RealtaScopeTech/Realta-EBBfocuser

The ASCOM driver part is quite barebones there.

Of course the microcontroller and stepper driver are different so probably need a lot of changes, but maybe an inspiration still.

Tony Gondola

Topic starter

Frequent contributor

11 days ago

Rainer Ots · Sep 22, 2025, 05:59 AM
There is also https://github.com/RealtaScopeTech/Realta-EBBfocuser
The ASCOM driver part is quite barebones there.
Of course the microcontroller and stepper driver are different so probably need a lot of changes, but maybe an inspiration still.

Thanks, I’ll take a look at at.