An IoT device sends an MQTT message every 15 minutes: "connected".
An MQTT-IN-Node receives this message in NodeRed and a SENDER-NODE forwards them to a Telegram bot.
As a result, I receive 96 messages a day in Telegram. ;-(
How can I set up NodeRed so that the SENDER-NODE only sends a message if no MQTT message has been received for 31 minutes?
Thank you for the reading,