I upgraded my OnStep controllers to the Fysetc S6 to add more functions, so these are now surplus. Had the parts so made up extra SHC's too. Everything works - you just need to add stepper motors.
It's set up for Alt/Az and you can now change your gearing without reflashing (just via your phone) so conversion should be easy.
What's included:
- STM32 blue-pill controller. I comfortably slew at 3deg/sec on my dob.
- TMC2209 UART drivers (very quiet and you can control current, steps, direction via web server rather than re-flashing)
- WiFi (smart web server). Allows remote control via planetarium software / smartphone.
- Buzzer
- Tracking LED
- Smart Hand Controller.
$190 + postage.