@felmue oh! I didn't know about this Easy I/O node. I'll try that and let you know how it went. Thanks a looot
EDIT : I just tried it and it worked like a charm! thank you so much. Above the red pin of the motor, it is written "5V". So no wonder it didn't worked as expected with 0,5V :/ Maybe we could point this out to someone at M5 so they can solve this?

@ajb2k3 Hey :) I've tried different values (including 100) and none of them worked :/

@felmue hello Felix thanks for your answer!
I'm using a M5StickC. I try to plug it to my computer and to a power socket, it doesn't change anything :/
the UIFlow code is a very simple test code:

And no I didn't tried Arduino example, what is it?

Hello!

I just bought a bunch of Vibrator Motor Units and none of them is working correctly :/ When I plug them i can hear a little soung from the motor but the metal piece does not move.

Sometimes (after setting the Vibrator on duty on 20 in the UI Flor for instance) the metal piece starts working after a little push with the finger. But it's very light and not really vibrating.
Does someone know why ?

I saw on the product page that there is an EasyLoader, but as I'm on Linux I can not try it. Is it the answer?

Many thanks,
Thomas