Bonjour Loulou74, j'ai pris mon temps pour essayer d'avancé, voila ce que j'ai fait.
J'ai installé MQTT.fx, la il ma trouvé 3 topics : Home/Pool/API , Home/Pool/status et Home/Pool/Err .
Je retrouve les mêmes sur JMQTT .
Ce qui est bizzare c'est que sur JMQTT ou MQTT.fx le status est offline alors que depuis le moniteur série de l'arduino le status est online.
Quand je regarde les logs sur jeedom et ça tourne en boucle.
[2019-05-04 09:48:05][DEBUG] : daemon starts, pid is 26980
[2019-05-04 09:48:05][INFO] : Connect to mosquitto: Host=localhost, Port=1883, Id=jeedom
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom sending CONNECT
[2019-05-04 09:48:05][INFO] : Equipment Home: subscribes to "Home/#" with Qos=1
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom sending SUBSCRIBE (Mid: 1, Topic: Home/#, QoS: 1, Options: 0x00)
[2019-05-04 09:48:05][INFO] : Subscribes to the API topic "jeedom/api"
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom sending SUBSCRIBE (Mid: 2, Topic: jeedom/api, QoS: 1, Options: 0x00)
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom received CONNACK (0)
[2019-05-04 09:48:05][DEBUG] : mosquitto: connection response is Connection Accepted.
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom sending PUBLISH (d0, q1, r1, m3, 'jeedom/status', ... (6 bytes))
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom received SUBACK
[2019-05-04 09:48:05][DEBUG] : mosquitto: topic subscription accepted, mid=1
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom received PUBLISH (d0, q1, r1, m1, 'Home/Pool/status', ... (7 bytes))
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom sending PUBACK (m1, rc0)
[2019-05-04 09:48:05][DEBUG] : Payload offline for topic Home/Pool/status
[2019-05-04 09:48:05][INFO] : -> Home|Poolstatus offline
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom received PUBLISH (d0, q1, r1, m2, 'Home/Pool/Err', ... (32 bytes))
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom sending PUBACK (m2, rc0)
[2019-05-04 09:48:05][DEBUG] : Payload Trying to print 83 chars to LCD1 for topic Home/Pool/Err
[2019-05-04 09:48:05][INFO] : -> Home|PoolErr Trying to print 83 chars to LCD1
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom received PUBLISH (d0, q1, r1, m3, 'Home/Pool/API', ... (10 bytes))
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom sending PUBACK (m3, rc0)
[2019-05-04 09:48:05][DEBUG] : Payload {"Mode":0} for topic Home/Pool/API
[2019-05-04 09:48:05][INFO] : -> Home|PoolAPI {"Mode":0}
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom received SUBACK
[2019-05-04 09:48:05][DEBUG] : mosquitto: topic subscription accepted, mid=2
[2019-05-04 09:48:05][DEBUG] : mosquitto: Client jeedom received PUBACK (Mid: 3, RC:0)
[2019-05-04 09:48:06][DEBUG] : mosquitto: disconnectedunexpectedly
[2019-05-04 09:48:06][WARNING] : exception thrown by MQTT client: The connection was lost.
[2019-05-04 09:48:06][INFO] : relance le démon dans 15s