Hi Kaczorek! Excellent work on the Astroberry Server. I know that's been keeping you very busy so take your time on this, no big rush. I have just about worked out the final iteration and will be releasing the STL files for anybody who can make use of them. Thanks Again.

I'm glad you find it useful. I should find time for the Adafruit Motor HAT driver soon. Stay tuned

Kaczorek: Will there be an option for backlash steps?

Why not

Excellent! I'm looking forward to giving this a spin.

There's really bad news on this driver. Adafruit provides only python library for this board and no c++ library is available that can be used directly. As the result a driver for this board needs to use low level PCA9685 driver (which basically means writing everything from scratch) or bind python library into c++ code (which reuses the library but still requires lots of coding).
In summary, for now a stepper focuser build on Adafruit Motor HAT can only work outside of INDI, controlled with python scripts released by a vendor. Integration with INDI will be possible if c++ library is available for the device.

Oh no. That's not good.

I'm trying to exercise my Google Fu and have come up with a couple results, it would seem other's have the same issue.
www.chiefdelphi.com/forums/showthread.php?p=1598518
github.com/threebrooks/AdafruitStepperMotorHAT_CPP
www.raspberrypi.org/forums/viewtopic.php?t=112415&p=908267
mjmeans.github.io/Adafruit.IoT/doc/html/...21e-7d84815c826d.htm

I hope some of this can be of use.

It seems that the second link would be quite useful. So we're back to the game

Hi, I have just finished the first version of the focuser driver for Adafruit Motor HAT.

Check it out at github.com/rkaczorek/astroberry-amh

I have developed it without hardware so please test it and let me know how it goes. Please be careful with stepper speed option.

That's Fantastic! I am out of town this weekend, but will eagerly test it once I'm back. Thank you.

I encountered an error in the final Make Install step
Never Mind. Must first install WiringPi.