http://grimore.i2p/iot/creating_an_alarm_beacon
Here is the corresponding Node-Red flow: [{"id":"149083f5c6bf2d08","type":"tab","label":"Alarm","disabled":false,"info":"","env":[]},{"id":"4fe73d2c27de0a40","type":"mqtt in","z":"149083f5c6bf2d08","name":"","topic":"alarm","qos":"2","datatype":"auto-detect","broker":"331ec98c048042f6","nl":false,"rap":true,"rh":0,"inputs":0,"x":150,"y":620,"wires":[["f4d5db9c6f1f452e"]]},{"id":"f4d5db9c6f1f452e","type":"debug","z":"149083f5c6bf2d08","name":"debug...