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from pymodbus.client.sync import ModbusTcpClient
from time import sleep
import socket

# Set up Modbus TCP client
client = ModbusTcpClient('localhost', 502)

# Define function to send TCP notification
def send_notification(message):
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
        s.connect(('192.168.1.100', 5000))  # set IP address and port of the device to receive notification
        s.sendall(message.encode())
        data = s.recv(1024)
        print(data.decode())

# Initialize coil values
previous_coils = client.read_coils(0, 100)

# Continuously monitor coils for changes
while True:
    current_coils = client.read_coils(0, 100)
    if current_coils.bits != previous_coils.bits:
        for i in range(100):
            if current_coils.bits[i] != previous_coils.bits[i]:
                coil_address = i
                coil_value = current_coils.bits[i]
                message = f"Coil {coil_address} has been set to {coil_value}"
                send_notification(message)
    previous_coils = current_coils
    sleep(0.1)

# Close Modbus TCP client
client.close()