With a couple of tweaks (because I dont have piper) it works for me.
I have un-hid the ui-audio to provide visual proof it works (this is a gif not a video with sound)
watch the counters and watch the media player as I press inject.
Reasons it might not work for you.
- The URL in the Send URL function sets the ui-audio src to
http:localhost:1880
- thats where my Node-RED server is. This is probably different. What URL is in your node-red editor? - You forgot to
click
somewhere in the dashboard page.
- The dashboard page was not visible (in a hidden tab)