@scharette @cbenson
Thank you two for your replies! I will have a look at your suggestions later this day.
Edit: after re-inspecting, it turned out that @scharette was totally right. There was a (very obvious) header missing; don’t know how I could have not seen this before 
Anyways thanks for your help, and also the nicely written and documented libraries on github.
Cheers,
Glenn
Haha… the reason I was right is that I had that issue a few times while writing that post… You know how it is, you start a task, get interrupted, start again, forget where you were, miss a pin alignment… and then what worked before stops working for no reason!
Glad to hear it is helpful! Feel free to fork it and create pull requests (PR) if you have improvements to propose!
And don’t be shy to create a page for your project and share your knowledge and experience (i.e.: really all the times you messed up and how to fix it 
that’s how mine look usually anyways) with the RobotShop community! 
I’m sure others would appreciate too!
