Arduino ASCOM Focuser Pro2 DIY

myFocuserPro2 (myFP2) is an ASCOM - INDI - LINUX - WINDOWS telescope focuser with a large range of options.

315,606+ file downloads. The most popular focuser project.

(c) Copyright Robert Brown 2014-2026. All Rights Reserved.
Code or portions of code may not be copied or used without written permission from the author.

Other Focuser Projects
myFP2ESP32 WiFi - https://sourceforge.net/projects/myfocuserpro2-esp32/ [ESP32 Only]
myFP2ESP8266 WiFi -
https://sourceforge.net/projects/myfp2esp8266-focus-controller/

myFP2N - Nextion touch screen display - https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/myFocuserPro2N%20NEXTION%20TFT%20DISPLAY/

myFP2M - Ready made Controllers
https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/myFocuserPro2M/

Please look in the Files-Documents folder for more information.
https://sourceforge.net/projects/arduinoascomfocuserpro2diy/files/Documentation/

Features

ASCOM drivers including Temperature Compensation and Stepsize support
Windows Application programs
Linux application with source code
INDI Driver myFocuserPro2
DRV8825, L298N, L293DMini, ULN2003, TMC2225/2209 driver module support
Full schematics, Stripboard layout, test programs, build instructions
Comprehensive and very detailed setup instructions
Build a professional, well supported stepper focuser for low cost
Full details in PDF
Support Videos

Project Samples

Project Activity

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User Reviews

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franske Edited 2025-07-12

It's looking amazingly good and just what I'm looking for. Only thing holding me back is the large and for me overwhelming manual. I have a ESP32 set with the 28BYJ-48 steppers. But I'm seriously considering the advantage of the Arduino. Also my question: can the focuser be connected via the USB port? .... But again, how to start...🤷🏻‍♂️

Reply from Arduino ASCOM Focuser Pro2 DIY

Posted 2025-12-31
Yes all NANO versions use a serial usb cable to communicate. After all the Nano has no network capability except for bluetooth, There is an esp32 version : two actually. https://sourceforge.net/projects/myfocuserpro2-esp32/ and the latest one is https://sourceforge.net/projects/myfp2esp32-s3-focus-controller/ I know the manual is huge. But it is possible to delete stuff around it and just concentrate on ULN2003 NANO, and do the solderless version?
pinak211 Posted 2024-01-19

Thanks to Robert Brown for presenting such an amazing electronic focuser with so many versions/options and features. PROS: - Availability of documentation - Prompt support from the author, even after so many years - It is compatible with to so many different types of motors, driver boards, and peripherals, making it highly suitable to one's individual needs - Extremely rich in features CONS: - Nothing My Views: Documentation can be overwhelming or confusing for someone who is a novice in DIY stuff. It happened to me as well. I thought of making it about an year ago, but documentation discouraged me! But believe me, if you read it step by step taking your time, and may be reading the same topic 2-3 times, it will definitely remove all your confusion. You will enjoy making it. And at last, Mr. Robert is always ready to help :) - Best is to go for solderless version. Quick and easy to build.
gamvil Posted 2023-06-07

the project is exceptional. the documentation covered every detail. I put together 3 controllers and each works great. I am quite satisfied and considering the cost of branded solutions, this project is a superior solution.
patosh Posted 2022-09-13

Outstanding work and impeccable support. I built one controller per piece of equipment that I configured individually. The project is much more efficient and less expensive than commercial focusers with the added bonus of the satisfaction of having carried it out yourself. I made my own PCB to optimize the connections and the adaptability to the case. Congratulations and thank you to Robert for sharing this very useful project for DIY astronomers. I take this opportunity to say that I also made the controller for the filter wheel and that I now plan to make the rotator. Thanks Robert. patrick
f1860001 Posted 2021-08-24

Un gran proyecto muy bien documentado.