70 lines
1.8 KiB
Python
70 lines
1.8 KiB
Python
import time
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import struct
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from pymodbus.client import ModbusTcpClient
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MODBUS_IP = "10.0.0.40"
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SLAVE_ID = 1
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POLL = 2.0 # Sekunden
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def u16_to_i16(u16):
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return struct.unpack(">h", struct.pack(">H", u16 & 0xFFFF))[0]
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def read_i16(client, addr, scale):
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rr = client.read_input_registers(address=addr, count=1, slave=SLAVE_ID)
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if rr.isError():
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return None
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raw = rr.registers[0]
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if raw == 65535:
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return None
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return round(u16_to_i16(raw) / scale, 1)
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def fmt(v):
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return f"{v:5.1f}" if v is not None else " ---"
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client = ModbusTcpClient(MODBUS_IP, port=502)
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try:
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if not client.connect():
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raise RuntimeError("Modbus connect failed")
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print("Logging temperatures (Ctrl+C to stop)\n")
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while True:
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# Eintrittsluft = Mittelwert aus 3x0324 & 3x0323 (scale 100)
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t_e1 = read_i16(client, 324, 100)
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t_e2 = read_i16(client, 323, 100)
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t_ein = None
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if t_e1 is not None and t_e2 is not None:
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t_ein = round((t_e1 + t_e2) / 2, 1)
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# Zuluft -> 3x0614 (/10)
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t_zuluft = read_i16(client, 614, 10)
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# Abluft -> Mittelwert aus 3x0581 & 3x0582 (/10)
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t_a1 = read_i16(client, 581, 10)
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t_a2 = read_i16(client, 582, 10)
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t_abluft = None
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if t_a1 is not None and t_a2 is not None:
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t_abluft = round((t_a1 + t_a2) / 2, 1)
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# Fortluft -> 3x0301 (/100)
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t_fortluft = read_i16(client, 301, 100)
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ts = time.strftime("%H:%M:%S")
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print(
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f"{ts} | "
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f"Eintritt: {fmt(t_ein)} °C | "
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f"Zuluft: {fmt(t_zuluft)} °C | "
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f"Abluft: {fmt(t_abluft)} °C | "
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f"Fortluft: {fmt(t_fortluft)} °C"
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)
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time.sleep(POLL)
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except KeyboardInterrupt:
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print("\nStopped by user.")
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finally:
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client.close()
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