print("modbus test")

# Настройки клиента Modbus
MODBUS_SERVER_HOST = "192.168.70.55"  # IP-адрес Modbus-сервера
MODBUS_SERVER_PORT = 502
MODBUS_SLAVE_ID=11

from pymodbus.client import ModbusTcpClient
from pymodbus.constants import Endian
from pymodbus.payload import BinaryPayloadDecoder

def bulb(addr):
    try:
        coils = client.read_coils(addr, 1, MODBUS_SLAVE_ID)
        print("читаем начальное состояние", coils.bits)

        new_bits = coils.bits
        new_bits[0] = not new_bits[0]
        print("пытаемся записать", new_bits, coils.slave_id)
        result = client.write_coil(addr, new_bits[0], coils.slave_id)
        print(result)

        print("читаем после попытки", client.read_coils(0, len(coils.bits), coils.slave_id).bits)
    except Exception as e:
        raise e
    
client = ModbusTcpClient(
    MODBUS_SERVER_HOST,
    port=MODBUS_SERVER_PORT,
)
client.connect()
try:
    bulb(1)
except Exception as e:
    print("error", e)

client.close()