@Qu3Uk the message received in Windows, and the device manager that has an exclamation point next to the device.

@mfalkvidd said: I am using them at 12V so the power would be ~4W. Not too much but still enough to get the sink hot! The voltage makes no difference. 5A is still 5A. you are right :-) brain fart

@hek said: If you have an Uno around your can use that for programming the ProMini. http://www.instructables.com/id/Arduino-Pro-Mini-Stand-Make-It-Reusable/ http://www.instructables.com/id/Uploading-sketch-to-Arduino-Pro-Mini-using-Arduino/ It's weekend and I finally have the time to give this another chance and guess what? It works! I manage to upload the sketch to my Pro Mini and successfully created my first ever MySensors sensor! Thank you so much for that!