Hi.
Can you show me a printscreen of the issue?
To share a picture, upload it to google drive, or dropbox, or imgur, for example, and then share a link to the file.
Regards,
Sara

I finally got it to work:
first after switching to english and reloading nodered and
second, more important, after setting GPIO as output and driving it low
raspi-gpio set 18 dl op
It would probably be worthwile to mention it in tutorials etc.
Thanks four your support, Marcus.

Hi again.
I’m sorry for that issue, but there must be something weird with your setup your something.
I’ve just tested everything again, and on my Raspberry Pi that doesn’t happen. The flow works right away without 
 
Can you tell me where you got that answer from? So that I can understand in which situations that specific error occurs.
 
Regards,
Sara

Hi Sara,
the first problem the rpi-gpio out node not available was solved by switching from german to english and
reloading nodered. Probably the reloading did it. But I prefer english anyway.
The solution depicted above I found out myself:
When the LED didn’t lit up and no voltage was measurable at GPIO 18 I checked the pin status

raspi-gpio get 18 

and found it was set to input. Changing it to output still didn’t work. So I draw it to low. Then it worked.
On page 89 of your book there is a box “initialise pin state ?” where you can set the pin status to low.
This might work also but I haven’t tested it.
Kind regards, Marcus.

Thank you for the clarification.
Probably it was set to input from a previous project you tested on the board?
I’ll make a little more research about it.
Thank you.
Regards,
Sara