The DigitalOut widget sends values to hardware to set the output of a digital port to a HIGH or LOW value. This can turn on or off anything connected to the digital output port, for example an LED or relay.
Connect another widget’s output to the input of DigitalOut.
To set the digital output port on your device, type in D plus the port number in the right hand tab. Be sure there are not other widgets connected to the same port.
Even without another widget connected, you can simulate input values by moving the on-screen “knob” to send values out to your hardware. You may need to unclick the checkbox on the right or left of a widget if a device such as Arduino is not connected.