Quand tu regardes dans les logs du RFXCOM, il doit y avoir des lignes (surtout en mode debug) des trames que le RFXCOM voit passé un peu comme cela :
[2021-02-04 10:53:05][DEBUG] : http://127.0.0.1:80 "POST /plugins/rfxcom/core/php/jeeRfxcom.php?apikey=puj0RCtjsU7CYF1ZOHAqkBC2JXhsAbLe HTTP/1.1" 200 0
[2021-02-04 10:53:07][DEBUG] : Message: 115a018621b2000000044600002fe9825599
[2021-02-04 10:53:07][DEBUG] : Decode : 115a018621b2000000044600002fe9825599
[2021-02-04 10:53:07][DEBUG] : Test message: 115a018621b2000000044600002fe9825599
[2021-02-04 10:53:07][DEBUG] : PacketType: 0x5A
[2021-02-04 10:53:07][DEBUG] : Length: 18
[2021-02-04 10:53:07][DEBUG] : Start decoding packet type 0x5A
[2021-02-04 10:53:07][DEBUG] : Subtype = ELEC2 is CM119160
[2021-02-04 10:53:07][DEBUG] : Data : {'packetlen': '0x11', 'packettype': '0x5A', 'subtype': '0x01', 'seqnbr': '0x86', 'id1': '0x21', 'id2': '0xB2', 'count': 0, 'instant': 1094, 'total': 803832405, 'battery': 100, 'rssi': 9}
[2021-02-04 10:53:07][DEBUG] : Decoded info : {'packettype': '0x5A', 'subtype': '0x01', 'id': '21B2', 'count': 0, 'instant': 1094, 'total': 3593896.28, 'battery': 100, 'rssi': 9}
[2021-02-04 10:53:07][DEBUG] : Device is known id : 21B2
[2021-02-04 10:53:08][DEBUG] : Send to jeedom : {'devices': {'21B25A': {'packettype': '0x5A', 'subtype': '0x01', 'id': '21B2', 'count': 0, 'instant': 1094, 'total': 3593896.28, 'battery': 100, 'rssi': 9}}}
[2021-02-04 10:53:08][DEBUG] : Starting new HTTP connection (1): 127.0.0.1:80
[2021-02-04 10:53:08][DEBUG] : {"devices":{"21B25A":{"packettype":"0x5A","subtype":"0x01","id":"21B2","count":0,"instant":1094,"total":3593896.28,"battery":100,"rssi":9}}}
[2021-02-04 10:53:08][DEBUG] : http://127.0.0.1:80 "POST /plugins/rfxcom/core/php/jeeRfxcom.php?apikey=[Doubledom]() HTTP/1.1" 200 0
[2021-02-04 10:53:14][DEBUG] : Message: 0a520787200e00cc360189
[2021-02-04 10:53:14][DEBUG] : Decode : 0a520787200e00cc360189
[2021-02-04 10:53:14][DEBUG] : Test message: 0a520787200e00cc360189
[2021-02-04 10:53:14][DEBUG] : PacketType: 0x52
[2021-02-04 10:53:14][DEBUG] : Length: 11
[2021-02-04 10:53:14][DEBUG] : Start decoding packet type 0x52
[2021-02-04 10:53:14][DEBUG] : Subtype = TH7 is TFA TS34C/Cresta/Honeywell TS33C
[2021-02-04 10:53:14][DEBUG] : Data : {'packetlen': '0x0A', 'packettype': '0x52', 'subtype': '0x07', 'seqnbr': '0x87', 'id1': '0x20', 'id2': '0x0E', 'temperaturesign': '', 'temperature': 204, 'humidity': 54, 'humidity_status': 1, 'battery': 100, 'rssi': 8}
[2021-02-04 10:53:14][DEBUG] : Decoded info : {'packettype': '0x52', 'subtype': '0x07', 'id': '200E', 'temperature': '20.4', 'humidity': 54, 'humidity_status': 1, 'battery': 100, 'rssi': 8}
[2021-02-04 10:53:14][DEBUG] : Device is known id : 200E
[2021-02-04 10:53:14][DEBUG] : Send to jeedom : {'devices': {'200E52': {'packettype': '0x52', 'subtype': '0x07', 'id': '200E', 'temperature': '20.4', 'humidity': 54, 'humidity_status': 1, 'battery': 100, 'rssi': 8}}}
[2021-02-04 10:53:14][DEBUG] : Starting new HTTP connection (1): 127.0.0.1:80
[2021-02-04 10:53:14][DEBUG] : {"devices":{"200E52":{"packettype":"0x52","subtype":"0x07","id":"200E","temperature":"20.4","humidity":54,"humidity_status":1,"battery":100,"rssi":8}}}
[2021-02-04 10:53:14][DEBUG] : http://127.0.0.1:80 "POST /plugins/rfxcom/core/php/jeeRfxcom.php?apikey=[Doubledom]() HTTP/1.1" 200 0
[2021-02-04 10:53:14][DEBUG] : Message: 0a520788c00e00c03a0199
[2021-02-04 10:53:14][DEBUG] : Decode : 0a520788c00e00c03a0199
[2021-02-04 10:53:14][DEBUG] : Test message: 0a520788c00e00c03a0199
[2021-02-04 10:53:14][DEBUG] : PacketType: 0x52
[2021-02-04 10:53:14][DEBUG] : Length: 11
[2021-02-04 10:53:14][DEBUG] : Start decoding packet type 0x52
[2021-02-04 10:53:14][DEBUG] : Subtype = TH7 is TFA TS34C/Cresta/Honeywell TS33C
[2021-02-04 10:53:14][DEBUG] : Data : {'packetlen': '0x0A', 'packettype': '0x52', 'subtype': '0x07', 'seqnbr': '0x88', 'id1': '0xC0', 'id2': '0x0E', 'temperaturesign': '', 'temperature': 192, 'humidity': 58, 'humidity_status': 1, 'battery': 100, 'rssi': 9}
[2021-02-04 10:53:14][DEBUG] : Decoded info : {'packettype': '0x52', 'subtype': '0x07', 'id': 'C00E', 'temperature': '19.2', 'humidity': 58, 'humidity_status': 1, 'battery': 100, 'rssi': 9}
[2021-02-04 10:53:14][DEBUG] : Device is known id : C00E
[2021-02-04 10:53:15][DEBUG] : Send to jeedom : {'devices': {'C00E52': {'packettype': '0x52', 'subtype': '0x07', 'id': 'C00E', 'temperature': '19.2', 'humidity': 58, 'humidity_status': 1, 'battery': 100, 'rssi': 9}}}
[2021-02-04 10:53:15][DEBUG] : Starting new HTTP connection (1): 127.0.0.1:80
[2021-02-04 10:53:15][DEBUG] : {"devices":{"C00E52":{"packettype":"0x52","subtype":"0x07","id":"C00E","temperature":"19.2","humidity":58,"humidity_status":1,"battery":100,"rssi":9}}}
[2021-02-04 10:53:15][DEBUG] : http://127.0.0.1:80 "POST /plugins/rfxcom/core/php/jeeRfxcom.php?apikey=[Doubledom]() HTTP/1.1" 200 0
[2021-02-04 10:53:16][DEBUG] : Message: 0a520a89560200b2430199
[2021-02-04 10:53:16][DEBUG] : Decode : 0a520a89560200b2430199
[2021-02-04 10:53:16][DEBUG] : Test message: 0a520a89560200b2430199
[2021-02-04 10:53:16][DEBUG] : PacketType: 0x52
[2021-02-04 10:53:16][DEBUG] : Length: 11
[2021-02-04 10:53:16][DEBUG] : Start decoding packet type 0x52
[2021-02-04 10:53:16][DEBUG] : Subtype = TH10 is Rubicson,IW008T,TX95,Xiron-EN6,WH5
[2021-02-04 10:53:16][DEBUG] : Data : {'packetlen': '0x0A', 'packettype': '0x52', 'subtype': '0x0A', 'seqnbr': '0x89', 'id1': '0x56', 'id2': '0x02', 'temperaturesign': '', 'temperature': 178, 'humidity': 67, 'humidity_status': 1, 'battery': 100, 'rssi': 9}
[2021-02-04 10:53:16][DEBUG] : Decoded info : {'packettype': '0x52', 'subtype': '0x0A', 'id': '5602', 'temperature': '17.8', 'humidity': 67, 'humidity_status': 1, 'battery': 100, 'rssi': 9}
[2021-02-04 10:53:16][DEBUG] : Device is known id : 5602
[2021-02-04 10:53:16][DEBUG] : Send to jeedom : {'devices': {'560252': {'packettype': '0x52', 'subtype': '0x0A', 'id': '5602', 'temperature': '17.8', 'humidity': 67, 'humidity_status': 1, 'battery': 100, 'rssi': 9}}}
[2021-02-04 10:53:16][DEBUG] : Starting new HTTP connection (1): 127.0.0.1:80
[2021-02-04 10:53:16][DEBUG] : {"devices":{"560252":{"packettype":"0x52","subtype":"0x0A","id":"5602","temperature":"17.8","humidity":67,"humidity_status":1,"battery":100,"rssi":9}}}
[2021-02-04 10:53:16][DEBUG] : http://127.0.0.1:80 "POST /plugins/rfxcom/core/php/jeeRfxcom.php?apikey=[Doubledom]() HTTP/1.1" 200 0
[2021-02-04 10:53:23][DEBUG] : Message: 0a520a8a690100c43d0199
[2021-02-04 10:53:23][DEBUG] : Decode : 0a520a8a690100c43d0199
[2021-02-04 10:53:23][DEBUG] : Test message: 0a520a8a690100c43d0199
[2021-02-04 10:53:23][DEBUG] : PacketType: 0x52
[2021-02-04 10:53:23][DEBUG] : Length: 11
[2021-02-04 10:53:23][DEBUG] : Start decoding packet type 0x52
[2021-02-04 10:53:23][DEBUG] : Subtype = TH10 is Rubicson,IW008T,TX95,Xiron-EN6,WH5
[2021-02-04 10:53:23][DEBUG] : Data : {'packetlen': '0x0A', 'packettype': '0x52', 'subtype': '0x0A', 'seqnbr': '0x8A', 'id1': '0x69', 'id2': '0x01', 'temperaturesign': '', 'temperature': 196, 'humidity': 61, 'humidity_status': 1, 'battery': 100, 'rssi': 9}
[2021-02-04 10:53:23][DEBUG] : Decoded info : {'packettype': '0x52', 'subtype': '0x0A', 'id': '6901', 'temperature': '19.6', 'humidity': 61, 'humidity_status': 1, 'battery': 100, 'rssi': 9}
[2021-02-04 10:53:23][DEBUG] : Device is known id : 6901
[2021-02-04 10:53:23][DEBUG] : Send to jeedom : {'devices': {'690152': {'packettype': '0x52', 'subtype': '0x0A', 'id': '6901', 'temperature': '19.6', 'humidity': 61, 'humidity_status': 1, 'battery': 100, 'rssi': 9}}}
[2021-02-04 10:53:23][DEBUG] : Starting new HTTP connection (1): 127.0.0.1:80
[2021-02-04 10:53:23][DEBUG] : {"devices":{"690152":{"packettype":"0x52","subtype":"0x0A","id":"6901","temperature":"19.6","humidity":61,"humidity_status":1,"battery":100,"rssi":9}}}
[2021-02-04 10:53:23][DEBUG] : http://127.0.0.1:80 "POST /plugins/rfxcom/core/php/jeeRfxcom.php?apikey=[Doubledom]() HTTP/1.1" 200 0
Si effectivement ton Plugin du RFXCOM est sur debug