I’m trying to move from a simpler notify.matrix service because the integration is unreliable and doesn’t reconnect if there was an internet issue at the moment HA starts.
Before I could just set the json message to include things like {{topic}} and {{payload}} and it would render the flow messages as expected. With the built in NodeRed Matrix nodes, it accepts only plaintext msg.payload.
To account for this, I’m trying to learn the jinja templates, and when I include {{topic}}, the output msg.payload is blank. How can I pass these flow msg values into the template?