shell_command:
ha_start: 'curl https://192.168.1.173:1880/endpoint/hastart'
# 'curl http://localhost:1880/hastart'
# http://localhost:1880/endpoint/hastart if you're using the Node-RED Community Hass.io Add-on.
In the status node, select one of the home assistant nodes you’re using in your flows. I’d suggest selecting an events: all, an events: state, or a trigger: state node.
EDIT: Added image because the status node looks a little different in the latest versions of Node-RED compared to the one showed in my blog post.
The node you will select doesn’t need necessarily to be part of that same flow, they only have to be using the same Home Assistant server. Any events: all, events: state, or trigger: state node will do.