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osaether/relays-state.py

Created December 8, 2018 16:12
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Show state of Venus GX Relays
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relays-state.py
#!/usr/bin/env python
from pymodbus.constants import Defaults
from pymodbus.constants import Endian
from pymodbus.client.sync import ModbusTcpClient as ModbusClient
from pymodbus.payload import BinaryPayloadDecoder
Defaults.Timeout = 25
Defaults.Retries = 5
client = ModbusClient('ipaddress.of.venus', port='502')
result = client.read_input_registers(806, 2)
decoder = BinaryPayloadDecoder.fromRegisters(result.registers, endian=Endian.Big)
relay1=decoder.decode_16bit_uint()
relay2=decoder.decode_16bit_uint()
print("Relay1: %d, Relay2: %d" % (relay1, relay2))
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osaether commented Dec 8, 2018 •
edited

If you get this error: "unexpected keyword argument 'endian'" try replacing
endian=Endian.Big
with
byteorder=Endian.Big

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