When searching through archive for Arduino keyword I only found this post : 

not so old but nothing else

And I found nothing related to Arduino in the geany and geany-plugins git repos.

But the feature request 597 ask for adding *.ino in the C++ extension and it is still open (well it's very easy to do).

When googling for Geany and Arduino, I've found a French blog explaining howto write, build and upload Arduino with Geany

Based on this, I made a filetypes.Arduino.conf that defines keyword to highlight Arduino functions like analogRead(), it also defines building commands based on the command line tool ino.

and update my filetype_extensions.conf to add an Arduino file type with extension *.ino and *.pde

This is not so much work, but it's already a lot better than Arduino IDE...

There are several drawbacks :

- it depends on the third party command line tool ino and this tool requires a special folder structure (to found the libs and so on...)

- it doesn't support autocompletion for now

- third party Arduino library keywords are not highlighted 

So this could be improve a lot but I think this is a good start and want to share it with people.

What's the best ?

I'm not familiar enough with plugin to know if it's better for that purpose or if a simple configuration file will be enough.

My configuration files are attached.

Feedbacks and help are welcome :-)

Antoine