No voltage on Spark4 pins


I tried everything I can think off.
The temp sensor are working fine, but when I tried to start for example a heating element I get 0v from the spark.
I´m sure that i missing something simple :slight_smile:


It works :slight_smile:
Now it´s only one thing left.
I´dont understand how i adding my valves
What should I adding them as solenoid or relay?


In the spark service page, open the OneWire GPIO Module block to add or edit channels. You can set their type there.