Messages : 2,020
Sujets : 158
Inscription : Mar 2022
Réputation :
3
11-02-2023, 10:29 AM
(Modification du message : 11-02-2023, 10:33 AM par jlm.)
Citation :Comment lire les données d'un appareil de mesure 230V via son port RS485 en protocole Modbus ?
Sans écrire une ligne de code, voici comment lire et décrypter les données d'un appareil de mesure 230V du type SDM120.
Celui ci a un port de communication RS485 et utilise le protocole Modbus pour dialoguer.
On va voir qu'avec 3 nœuds Nodered le job peut être obtenu.
Là où il fallait des heures de programmation. Cette technique peut s'appliquer à la plupart des appareils connectés.
(Bien évidemment on pourrait utiliser un ESP pour ce faire mais ce n'était pas le but)
Cette vidéo est assez technique, accrochez-vous 
Jean-Luc
Messages : 65
Sujets : 4
Inscription : Jul 2024
Réputation :
0
Salut Jean-Luc
C'est marrant mais en cherchant des info sur mon Module Chint je me suis retrouvé par hasard sur la video de ton SDM120CT.
Tu aurais pu m'en parlais j'aurais ptet pris ce modele...
Tiens du coup qq questions :
-Tu l'as acheté ou ton SDM120CT ? Combien ?
-Tu pourrais partager ton flow ? C'est pas qu'il est compliqué , mais sur ta video tu as une grosse tête  qui masque les parametres a un moment.
-Comment sais tu qu'il faut appliquer un Ratio sur les registres que tu lis ? J'ai parcouru la doc mais j'ai rien vu.
Messages : 2,020
Sujets : 158
Inscription : Mar 2022
Réputation :
3
Aujourd’hui, 10:26 AM
(Modification du message : Aujourd’hui, 10:27 AM par jlm.)
Oulààà tu déterres des archives
J'avais presque oublié cette vidéo. Oui j'ai une grosse tête, j'ai en peu corrigé dans les dernières. J'ai moins la grosse tête 
Bon j'ai vraiment dû fouiller pour retrouver le code.
Le voici.
Je l'avais trouvé tel que sur le Net à l'époque. Il pourrait à l'évidence être amélioré mais il fonctionnait.
La bestiole, c'est mon fils un jour qui est venu avec et m'a dit, tiens ils ne s'en servent pas au boulot.
Ca fonctionne bien cela dit. Mais j'ai un faible certain pour le petit dernier en zigbee direct dans HA. Ah le prêt à porter sur la confection de masse, éternel débat.
Bon j'arrête de délirer, voici le code
Format fichier:
flows(39).json (Taille : 12.67 Ko / Téléchargements : 3)
Ou direct copier / coller
Code : [
{
"id": "de9ded18.1099f",
"type": "tab",
"label": "Modbus Energy meter",
"disabled": false,
"info": ""
},
{
"id": "b3ae0448.822d08",
"type": "comment",
"z": "de9ded18.1099f",
"name": "SDM120 Energy Meter",
"info": "",
"x": 140,
"y": 280,
"wires": []
},
{
"id": "53b4b356.bf124c",
"type": "modbus-read",
"z": "de9ded18.1099f",
"name": "SDM 120 Voltage",
"topic": "",
"showStatusActivities": true,
"logIOActivities": false,
"showErrors": true,
"unitid": "1",
"dataType": "InputRegister",
"adr": "0",
"quantity": "2",
"rate": "5",
"rateUnit": "s",
"delayOnStart": true,
"startDelayTime": "5",
"server": "40f20c7f.13a934",
"useIOFile": false,
"ioFile": "",
"useIOForPayload": false,
"emptyMsgOnFail": false,
"x": 140,
"y": 340,
"wires": [
[
"e4d3fade.1132a8"
],
[]
]
},
{
"id": "e4d3fade.1132a8",
"type": "function",
"z": "de9ded18.1099f",
"name": "Voltage",
"func": "var rawData = new ArrayBuffer(4);\nvar intView = new Uint16Array(rawData);\nvar fltView = new Float32Array(rawData);\n\nintView[0] = msg.payload[1]; //low\nintView[1] = msg.payload[0]; //high\n\nmsg.payload = parseFloat(fltView[0].toFixed(1));\nmsg.topic = \"voltage\";\n\nnode.status({fill:\"blue\",shape:\"ring\",text:msg.topic + \":\" + msg.payload}); \n\nreturn msg;",
"outputs": 1,
"noerr": 0,
"x": 320,
"y": 340,
"wires": [
[
"94b7c2b7.b61ae",
"267d6c75.311c84"
]
]
},
{
"id": "e3643b3e.be3a88",
"type": "function",
"z": "de9ded18.1099f",
"name": "Current",
"func": "var rawData = new ArrayBuffer(4);\nvar intView = new Uint16Array(rawData);\nvar fltView = new Float32Array(rawData);\n\nintView[0] = msg.payload[1]; //low\nintView[1] = msg.payload[0]; //high\n\nmsg.payload = parseFloat(fltView[0].toFixed(1));\nmsg.topic = \"current\";\n\nnode.status({fill:\"blue\",shape:\"ring\",text:msg.topic + \":\" + msg.payload}); \n\nreturn msg;",
"outputs": 1,
"noerr": 0,
"x": 320,
"y": 400,
"wires": [
[
"fa18b5f3.ba6be8",
"267d6c75.311c84"
]
]
},
{
"id": "4dbf9277.487e4c",
"type": "function",
"z": "de9ded18.1099f",
"name": "Power",
"func": "var rawData = new ArrayBuffer(4);\nvar intView = new Uint16Array(rawData);\nvar fltView = new Float32Array(rawData);\n\nintView[0] = msg.payload[1]; //low\nintView[1] = msg.payload[0]; //high\n\nmsg.payload = parseFloat(fltView[0].toFixed(1));\nmsg.payload = msg.payload * (-1)\nmsg.topic = \"power\";\n\nnode.status({fill:\"blue\",shape:\"ring\",text:msg.topic + \":\" + msg.payload}); \n\nreturn msg;",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"x": 310,
"y": 460,
"wires": [
[
"c3697655.758e28",
"267d6c75.311c84"
]
]
},
{
"id": "593c6698.c25388",
"type": "function",
"z": "de9ded18.1099f",
"name": "Frequency",
"func": "var rawData = new ArrayBuffer(4);\nvar intView = new Uint16Array(rawData);\nvar fltView = new Float32Array(rawData);\n\nintView[0] = msg.payload[1]; //low\nintView[1] = msg.payload[0]; //high\n\nmsg.payload = parseFloat(fltView[0].toFixed(1));\nmsg.topic = \"frequency\";\n\nnode.status({fill:\"blue\",shape:\"ring\",text:msg.topic + \":\" + msg.payload}); \n\nreturn msg;",
"outputs": 1,
"noerr": 0,
"x": 330,
"y": 520,
"wires": [
[
"c38e8fed.7fb6a",
"267d6c75.311c84"
]
]
},
{
"id": "7df027a2.13a1f8",
"type": "function",
"z": "de9ded18.1099f",
"name": "Energy",
"func": "var rawData = new ArrayBuffer(4);\nvar intView = new Uint16Array(rawData);\nvar fltView = new Float32Array(rawData);\n\nintView[0] = msg.payload[1]; //low\nintView[1] = msg.payload[0]; //high\n\nmsg.payload = parseFloat(fltView[0].toFixed(2));\nmsg.topic = \"energy\";\n\nnode.status({fill:\"blue\",shape:\"ring\",text:msg.topic + \":\" + msg.payload}); \n\nreturn msg;",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"x": 320,
"y": 580,
"wires": [
[
"d87b3ecd.2dab2",
"267d6c75.311c84"
]
]
},
{
"id": "7d42a707.bcd618",
"type": "modbus-read",
"z": "de9ded18.1099f",
"name": "SDM 120 Current",
"topic": "",
"showStatusActivities": true,
"logIOActivities": false,
"showErrors": true,
"unitid": "1",
"dataType": "InputRegister",
"adr": "6",
"quantity": "2",
"rate": "5",
"rateUnit": "s",
"delayOnStart": true,
"startDelayTime": "5",
"server": "40f20c7f.13a934",
"useIOFile": false,
"ioFile": "",
"useIOForPayload": false,
"emptyMsgOnFail": false,
"x": 140,
"y": 400,
"wires": [
[
"e3643b3e.be3a88"
],
[]
]
},
{
"id": "576a7fbe.d0861",
"type": "modbus-read",
"z": "de9ded18.1099f",
"name": "SDM 120 Power",
"topic": "",
"showStatusActivities": true,
"logIOActivities": false,
"showErrors": true,
"unitid": "1",
"dataType": "InputRegister",
"adr": "12",
"quantity": "2",
"rate": "5",
"rateUnit": "s",
"delayOnStart": true,
"startDelayTime": "5",
"server": "40f20c7f.13a934",
"useIOFile": false,
"ioFile": "",
"useIOForPayload": false,
"emptyMsgOnFail": false,
"x": 140,
"y": 460,
"wires": [
[
"4dbf9277.487e4c"
],
[]
]
},
{
"id": "519b5a74.1a7314",
"type": "modbus-read",
"z": "de9ded18.1099f",
"name": "SDM 120 Frequency",
"topic": "",
"showStatusActivities": true,
"logIOActivities": false,
"showErrors": true,
"unitid": "1",
"dataType": "InputRegister",
"adr": "70",
"quantity": "2",
"rate": "5",
"rateUnit": "s",
"delayOnStart": true,
"startDelayTime": "5",
"server": "40f20c7f.13a934",
"useIOFile": false,
"ioFile": "",
"useIOForPayload": false,
"emptyMsgOnFail": false,
"x": 150,
"y": 520,
"wires": [
[
"593c6698.c25388"
],
[]
]
},
{
"id": "b84798db.04be98",
"type": "modbus-read",
"z": "de9ded18.1099f",
"name": "SDM 120 Energy",
"topic": "",
"showStatusActivities": true,
"logIOActivities": false,
"showErrors": true,
"unitid": "1",
"dataType": "InputRegister",
"adr": "342",
"quantity": "2",
"rate": "60",
"rateUnit": "s",
"delayOnStart": true,
"startDelayTime": "5",
"server": "40f20c7f.13a934",
"useIOFile": false,
"ioFile": "",
"useIOForPayload": false,
"emptyMsgOnFail": false,
"x": 140,
"y": 580,
"wires": [
[
"7df027a2.13a1f8",
"1b35ee5d.7dd512"
],
[]
]
},
{
"id": "94b7c2b7.b61ae",
"type": "ui_text",
"z": "de9ded18.1099f",
"group": "b1bb14f0043ca966",
"order": 0,
"width": 0,
"height": 0,
"name": "",
"label": "Voltage",
"format": "{{msg.payload}} V",
"layout": "row-spread",
"x": 500,
"y": 340,
"wires": []
},
{
"id": "fa18b5f3.ba6be8",
"type": "ui_text",
"z": "de9ded18.1099f",
"group": "b1bb14f0043ca966",
"order": 1,
"width": 0,
"height": 0,
"name": "",
"label": "Current",
"format": "{{msg.payload}} A",
"layout": "row-spread",
"x": 500,
"y": 400,
"wires": []
},
{
"id": "c3697655.758e28",
"type": "ui_text",
"z": "de9ded18.1099f",
"group": "b1bb14f0043ca966",
"order": 2,
"width": 0,
"height": 0,
"name": "",
"label": "Power",
"format": "{{msg.payload}} W",
"layout": "row-spread",
"x": 490,
"y": 460,
"wires": []
},
{
"id": "c38e8fed.7fb6a",
"type": "ui_text",
"z": "de9ded18.1099f",
"group": "b1bb14f0043ca966",
"order": 3,
"width": 0,
"height": 0,
"name": "",
"label": "Frequency",
"format": "{{msg.payload}} Hz",
"layout": "row-spread",
"x": 510,
"y": 520,
"wires": []
},
{
"id": "d87b3ecd.2dab2",
"type": "ui_text",
"z": "de9ded18.1099f",
"group": "b1bb14f0043ca966",
"order": 4,
"width": 0,
"height": 0,
"name": "",
"label": "Total Energy",
"format": "{{msg.payload}} kWh",
"layout": "row-spread",
"x": 510,
"y": 580,
"wires": []
},
{
"id": "267d6c75.311c84",
"type": "function",
"z": "de9ded18.1099f",
"name": "Build object",
"func": "watch_topic = \"energy\";\nvar output = {};\n\ncontext.set(msg.topic,msg.payload);\n\nif (context.get(\"voltage\")!==undefined) {\n output.voltage = context.get(\"voltage\");\n}\nif (context.get(\"current\")!==undefined) {\n output.current = context.get(\"current\");\n}\nif (context.get(\"power\")!==undefined) {\n output.power = context.get(\"power\");\n}\nif (context.get(\"frequency\")!==undefined) {\n output.frequency = context.get(\"frequency\");\n}\nif (context.get(\"energy\")!==undefined) {\n output.energy = context.get(\"energy\");\n}\nmsg.payload = output;\n\nif (msg.topic===watch_topic) {\n msg.topic = \"sdm120\";\n return msg;\n}",
"outputs": 1,
"noerr": 0,
"x": 770,
"y": 480,
"wires": [
[
"6d3190d1.e5037"
]
]
},
{
"id": "6d3190d1.e5037",
"type": "debug",
"z": "de9ded18.1099f",
"name": "",
"active": false,
"tosidebar": true,
"console": false,
"complete": "true",
"statusVal": "",
"statusType": "auto",
"x": 910,
"y": 480,
"wires": []
},
{
"id": "1b35ee5d.7dd512",
"type": "debug",
"z": "de9ded18.1099f",
"name": "data array",
"active": false,
"tosidebar": true,
"console": false,
"tostatus": false,
"complete": "payload",
"targetType": "msg",
"statusVal": "",
"statusType": "auto",
"x": 320,
"y": 640,
"wires": []
},
{
"id": "40f20c7f.13a934",
"type": "modbus-client",
"name": "Modbus SDM120",
"clienttype": "serial",
"bufferCommands": true,
"stateLogEnabled": false,
"queueLogEnabled": false,
"failureLogEnabled": false,
"tcpHost": "127.0.0.1",
"tcpPort": "502",
"tcpType": "DEFAULT",
"serialPort": "/dev/ttyUSB0",
"serialType": "RTU-BUFFERD",
"serialBaudrate": "9600",
"serialDatabits": "8",
"serialStopbits": "1",
"serialParity": "none",
"serialConnectionDelay": "100",
"serialAsciiResponseStartDelimiter": "",
"unit_id": "",
"commandDelay": 30,
"clientTimeout": 2000,
"reconnectOnTimeout": false,
"reconnectTimeout": 5000,
"parallelUnitIdsAllowed": false
},
{
"id": "b1bb14f0043ca966",
"type": "ui_group",
"name": "SDM120 Energy Meter",
"tab": "ae839dae17d774a1",
"order": 1,
"disp": true,
"width": "6",
"collapse": false
},
{
"id": "ae839dae17d774a1",
"type": "ui_tab",
"name": "Modbus",
"icon": "memory",
"order": 28,
"disabled": false,
"hidden": false
}
]
Jean-Luc
Messages : 65
Sujets : 4
Inscription : Jul 2024
Réputation :
0
Merci
(Aujourd’hui, 10:26 AM)jlm a écrit : Ca fonctionne bien cela dit. Mais j'ai un faible certain pour le petit dernier en zigbee direct dans HA. Ah le prêt à porter sur la confection de masse, éternel débat. J'ai des principe et pour le moment j'arrive a me tenir a l'écart de Zigbee
Après tu as raison un truc basé sur du Zigbee, ESP ou autre se met parfois bcp plus facilement en service.
Là moi l'idée c'est d'avoir une référence fiable dans un 1er temps pour ensuite valider ou non des voies de mesure sur ESP ou sur mes Actionneur KNX de ma domotique.
Bon et puis ensuite il y aura aussi la partie PV ... 
|
![[-]](https://domosimple.eu/forum/images/collapse.png "[-]")
