我也在尝试同样的方法，你的代码让我走上了正确的道路！我使用ChatGPT来给予我更多的信息，它建议使用“pymodbus”代替。
要找到寄存器，请参阅https://support.huawei.com/enterprise/en/doc/EDOC1100050690（查看第14页-> SN 30 ->这就是我所说的寄存器信息）。
我用来检查每日收益率的代码作为测试：

from pymodbus.client import ModbusTcpClient
# Replace 'x.x.x.x' with your Smartlogger IP address
client = ModbusTcpClient('x.x.x.x')

# Specify the Modbus unit ID (default is 0)
unit_id = 0

# Specify the starting register address and the number of registers to read
starting_register = 40562
num_registers = 2

try:
    # Connect to the Modbus TCP server
    if client.connect():
        # Read holding registers from the Smartlogger
        response = client.read_holding_registers(starting_register, num_registers, unit=unit_id)

        if not response.isError():
            # Extract the data from the response
            data = response.registers
            print(data)
        else:
            print("Modbus error response:", response)
    else:
        print("Could not connect to Modbus TCP server.")

except Exception as e:
    print("Error:", e)

finally:
    # Close the Modbus TCP connection
    client.close()

这给了我这个结果：

[0, 19560]

Smartlogger的Web UI显示1.96MWh，docu说这个值的增益为10，单位为kWh。所以将结果除以10，你就得到了你的kWh。