Hello,

I've done an arduino focuser with 3 speed, 1 Step, 1/8 Step, 1/32 Step
Manually controled or in remote with terminal and a Script focus.sh
To move inward 20 Steps: I send (Sérial via USB, ASCI readable) focus.sh 1020
outward 150 Steps: focus.sh 2150

really easy

I want to do a driver for ekos/kstars
How to do it ? Software, in C or c++, but I don't know the structure, and have no idea how to program it
It is possible ?
I've more worked with c#/Visual Studio, or scripting bash, lua etc

hmmm... seems like I've to look at "moonlite" arduino focuser

Yes, the easiest way is to look at an existing INDI focuser driver. Also Focuser documentation here: www.indilib.org/api/classINDI_1_1Focuser.html

Then maybe you can write a tutorial on how to develop an INDI Focuser driver? so that new users can learn from you? that would be great.

hmmm...
under windows why not, but I don't want this system anymore.

Nop, now I do the changes on Arduino between my focuser and the solution of Cees Lensink, to use the moonlite driver with my second Setup (Mak100/1400 ASI120)
then,
find a solution for the HitecAstrofocus controler on my first setup (deep sky).... or replace it with an Arduino