Python-TCP-IP-Communication

Installation

Git Clone Command

1. Open Git Bash.
2. Clone.

git clone https://github.com/HoningLo/Python-TCP-IP-Communication.git
cd Python-TCP-IP-Communication

Requirements

• Python >= 3.6

Create a virtual environment:

python -m venv venv

# Windows
.\venv\scripts\activate

# Linux
source venv/bin/activate

Install the dependencies:

pip install -r requirements.txt

Headless Install

Linux:

./install.sh

Web API

Build Web API (Http API)

Run the main.py:

python main.py

Browse to the sample application at http://localhost:9527 in a web browser.

Edit the file main.py and replace the parameters HOST and PORT with your specific IP address and port number.

# main.py

...
...
...

if __name__ == '__main__':
    HOST = "localhost"
    PORT = 9527
    uvicorn.run(app, host=HOST, port=PORT)

Requests Web API (Http API)

Edit the file Requests_WebAPI.py and replace the text ____Enter_Your_DeviceID____, ____Enter_Your_URL____ with your DeviceID and your URL.

# main.py

...
url = "____Enter_Your_URL____"
...
data = {"DeviceID": "____Enter_Your_DeviceID____"}
...

Run the Requests_WebAPI.py:

python Requests_WebAPI.py

Result:

Socket

Build Server

Edit the file Socket_Server.py and replace the parameters HOST and PORT with your specific IP address and port number.

# Socket_Server.py

...
...
...

if __name__ == '__main__':
    HOST = "localhost"
    PORT = 9527
    build_server(HOST, PORT)

Run the Socket_Server.py:

python Socket_Server.py

Client

Edit the file Socket_Client.py and replace the parameters HOST and PORT with your specific IP address and port number.

# Socket_Client.py

...
...
...

if __name__ == '__main__':
    HOST = "localhost"
    PORT = 9527
    send_message(HOST, PORT)

Run the Socket_Client.py :

python Socket_Client.py 

Server Result:

Client Result:

ModbusTCP

Build Server

Edit the file ModbusTCP_Server.py and replace the parameters HOST and PORT with your specific IP address and port number.

# ModbusTCP_Server.py

...
...
...

if __name__ == '__main__':
    HOST = "localhost"
    PORT = 9527
    build_server(HOST, PORT)

Run the ModbusTCP_Server.py:

python ModbusTCP_Server.py

Client

Edit the file ModbusTCP_Client.py and replace the parameters HOST and PORT with your specific IP address and port number.

# ModbusTCP_Client.py

...
...
...

if __name__ == '__main__':
    HOST = "localhost"
    PORT = 9527
    modbus_client = Modbus_Client(HOST, PORT)
    modbus_client.read_holding_registers(0)
    modbus_client.write_single_register(1, 111)
    modbus_client.write_multiple_registers(2, [222, 333, 444])

Run the ModbusTCP_Client.py :

python ModbusTCP_Client.py 

Server Result:

Client Result:

Reference

Johannes4Linux/Simple-ModbusTCP-Server: An example for a Modbus TCP server written in Python with pyModbusTCP (github.com)

Python Socket - Python network programming with sockets (zetcode.com)

[Python] 使用 socket 模組基本教學 - Clay-Technology World (clay-atlas.com)

tiangolo/fastapi: FastAPI framework, high performance, easy to learn, fast to code, ready for production (github.com)

FastAPI (tiangolo.com)