Okay, I tested this myself and obtained the same results as @mortenjs and @marvin7. I use the Blynk Cloud server. This was mjy methodology:
Create some Blynk code that toggles the state of pin V1 from 0 to 1 once every second. The same Auth Code is used at all stages of this, and it’s linked to my project called Test.
Add a blynk-ws-in-write node with a connection to the same Test Auth Code and linked to V1. A debug node is connected to the output.
Nothing appears in the debug screen. I added a button widget to the app linked to the same project and linked to V1. This flashes on/off once every second as expected.
The solution is to use an HTTP GET command to obtain the value of the V pin as shown below:
The HTTP Request node used the following URL:
As you can see in the screenshot, the result looks like this:
so it needs a bit of manipulation/parsing to remove the unwanted quotes and square brackets, but it does work.
The inject node simply triggers the HTTP GET as frequently as you need the data, and the RBE node only allows changed values through.