54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
from pymodbus.client import ModbusTcpClient
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import struct
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import time
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from pymodbus.constants import Endian
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from pymodbus.payload import BinaryPayloadDecoder
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# Verbindung zur Wärmepumpe
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ip = '10.0.0.10'
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port = 502
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unit_id = 1
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# Liste von interessanten Holding-Register-Adressen
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registers = {
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300: {'desc': 'Außentemperatur in °C', 'type': 'REAL'},
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315: {'desc': 'Spannung FU Ausgang in V', 'type': 'REAL'},
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}
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client = ModbusTcpClient(ip, port=port)
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try:
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if not client.connect():
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print("Verbindung zur Wärmepumpe fehlgeschlagen.")
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exit(1)
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print("Verbindung zur Wärmepumpe erfolgreich.")
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while True:
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print(f"\n--- Neue Abfrage --- {time.strftime('%Y-%m-%d %H:%M:%S')} ---")
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for address, info in registers.items():
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reg_type = info['type']
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result = client.read_input_registers(address, count=2 if reg_type == 'REAL' else 1)#, unit=unit_id)
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if result.isError():
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print(f"Fehler beim Lesen von Adresse {address}: {result}")
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continue
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if reg_type == 'REAL':
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decoder = BinaryPayloadDecoder.fromRegisters(
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result.registers,
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byteorder=Endian.BIG,
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wordorder=Endian.LITTLE # ← Das ist der Trick!
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)
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value = decoder.decode_32bit_float()
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else:
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value = result.registers[0]
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print(f"Adresse {address} - {info['desc']}: {value}")
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time.sleep(10)
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except KeyboardInterrupt:
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print("Beendet durch Benutzer (Ctrl+C).")
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finally:
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client.close()
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