Wiznet makers

Source Code Explanation

Imports:

• socket, usocket: Used for TCP communication.
• machine, network: Handles hardware and networking functionalities.
• time, uasyncio: Provides timing and async support.
• w5x00_init: Initializes the WIZnet W5x00 Ethernet module.

Connection Settings:

• destip = '192.168.7.3' and destport = 2300 define the target server.
• conn_info = (destip, destport) holds the connection tuple.
• conn_flag: Tracks connection status.

client_loop(ip):

• Establishes a persistent TCP connection to the server.
• Continuously attempts reconnection if the connection fails.
• Receives data (s.recv(2048)), decodes it, prints it, and echoes it back.

main():

• Calls w5x00_init() to configure the W5x00 Ethernet module.
• Extracts IP and starts client_loop(ip).

Execution Flow:

• Runs as __main__, initializes Ethernet, and starts the TCP client.

▶ How to Run

Prepare Hardware:

• Connect the WIZnet W5x00 Ethernet module to the MicroPython board.
• Ensure the board is networked via Ethernet.

Deploy Code:

• Upload the script to the MicroPython board.
• Run main.py via REPL or automatically on boot.

Set Up a TCP Server (for testing):

nc -lvp 2300

Or use a Python TCP server:

import socket
s = socket.socket()
s.bind(('0.0.0.0', 2300))
s.listen(1)
conn, addr = s.accept()
while True:
   data = conn.recv(2048)
   if data:
       conn.send(data)

Execution Result

• If connection succeeds:

my ip is 192.168.7.100
Loopback client Connect! (0.5) seconds
recv from 192.168.7.3:[2300]: Hello Server

• If the server disconnects:

disconnect [Errno 104] ECONNRESET
connect error [Errno 111] ECONNREFUSED

• Data Echoing:
  • Any received message is echoed back to the sender.