Modbus RTU sin secretos. Extrae toda la información de tu Huawei SUN2000.
Tu inversor solar te puede dar mucha más información de la que ves en la app del fabricante. En este vídeo te cuento cómo conecto con mi inversor, mediante un Elfin-EW11A y una conexión MODBUS RTU.
Espero que te guste.
Aquí la segunda parte del vídeo:
Enlaces:
Manual EW11A
Enlace de compra
Esquema de conversor RS485-UART
Manual del SUN2000
Registros SUN2000
Modbus Poll
Flujo de Node-Red a continuación:
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"id": "7908d37bb69e42e5",
"type": "tab",
"label": "Inversor y Termo",
"disabled": false,
"info": "",
"env": []
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{
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"type": "function",
"z": "7908d37bb69e42e5",
"name": "PrimerChorizo",
"func": "\nmsg.payload = {\n PV_Un: (msg.payload[0] << 16 >> 16)/10, \n PV_In: (msg.payload[1] << 16 >> 16)/100, \n PV_P: ((msg.payload[48] * 65536 + msg.payload[49]) << 16 >> 16)/1000,\n U_A_B: (msg.payload[50] << 16 >> 16)/10, \n U_A: (msg.payload[53] << 16 >> 16)/10, \n U_B: (msg.payload[54] << 16 >> 16)/10, \n I_A: ((msg.payload[56] * 65536 + msg.payload[57]))/1000, \n P_peak: ((msg.payload[62] * 65536 + msg.payload[63]))/1000, \n P_active: ((msg.payload[64] * 65536 + msg.payload[65]) ),\n P_reactive: ((msg.payload[66] * 65536 + msg.payload[67]) << 32 >> 32)/1000,\n PF: (msg.payload[68] << 16 >> 16)/1000, \n Frequency: (msg.payload[69]) / 100, \n η: (msg.payload[70] << 16 >> 16)/100, \n Temp: msg.payload[71]/10, \n P_accum: ((msg.payload[90]*65536+msg.payload[91]))/100,\n P_daily: ((msg.payload[98]*65536+msg.payload[99]))/100\n}\nreturn msg;",
"outputs": 1,
"noerr": 0,
"initialize": "",
"finalize": "",
"libs": [],
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"y": 160,
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"initialize": "",
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"areaSelector": "friendlyName",
"deviceSelector": "friendlyName",
"entitySelector": "friendlyName",
"statusSeparator": "at: ",
"statusYear": "hidden",
"statusMonth": "short",
"statusDay": "numeric",
"statusHourCycle": "h23",
"statusTimeFormat": "h:m",
"enableGlobalContextStore": true
}
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