The flow I’m using in Node-Red :
(The one in the first message won’t be imported)
[{"id":"aaed49fc.8415e8","type":"mqtt-broker","broker":"localhost","port":"1883","clientid":""},{"id":"e1afc6e3.f3bd98","type":"mqtt-broker","broker":"10.145.1.36","port":"1883","clientid":""},{"id":"568ea4ca.7304dc","type":"lora in","name":"","datatype":"utf8","x":328,"y":273,"z":"3abaccdb.89d6ac","wires":[["11a11f9d.a9fb4","e62ce779.58aa3","ce084f78.0b1768"]]},{"id":"a7b36fa2.74cb4","type":"lora out","name":"","eui":"","payload":"","ack":true,"port":"0","x":1076,"y":263,"z":"3abaccdb.89d6ac","wires":[]},{"id":"2e6d3069.5b252","type":"debug","name":"","active":true,"console":"false","complete":"payload","x":1069,"y":137,"z":"3abaccdb.89d6ac","wires":[]},{"id":"d6d2f744.120028","type":"mqtt out","name":"","topic":"mDot","qos":"","retain":"","broker":"e1afc6e3.f3bd98","x":1064,"y":204,"z":"3abaccdb.89d6ac","wires":[]},{"id":"14be1b82.7a757c","type":"function","name":"Reponse","func":"var nbr = msg.payload.substring(13);\nmsg.payload=\"Reponse_Test \";\nmsg.payload += nbr;\n\nreturn msg;","outputs":1,"noerr":0,"x":853,"y":263,"z":"3abaccdb.89d6ac","wires":[["a7b36fa2.74cb4","2e6d3069.5b252"]]},{"id":"ce084f78.0b1768","type":"mqtt out","name":"MQTT Clear Node","topic":"lora/00-80-00-00-00-00-d6-54/clear","qos":"","retain":"","broker":"aaed49fc.8415e8","x":602,"y":442,"z":"3abaccdb.89d6ac","wires":[]},{"id":"11a11f9d.a9fb4","type":"delay","name":"","pauseType":"delay","timeout":"500","timeoutUnits":"milliseconds","rate":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":596,"y":202,"z":"3abaccdb.89d6ac","wires":[["14be1b82.7a757c","d6d2f744.120028"]]},{"id":"e62ce779.58aa3","type":"debug","name":"","active":true,"console":"false","complete":"true","x":600,"y":151,"z":"3abaccdb.89d6ac","wires":[]}]