I am searching for a solution to send only the topic without the payload.
Background: I have a Heos 1 Wifi speaker. it is connected to my homeautomation system FHEM. FHEM is able to publish ans subscibe MQTT messages.
This speaker starts to play on
/cmnd/entertain/wz/heos1/play and stops on
Both commands sendet by hand on the MQTT broker UI do very well.
How do i tell node red to send only the topic without any payload.
Best regards O.J.
(please excuse my weak english)