---
title: "RP2040 wifi Loopback server (use wizfi360+micropython)"
url: "https://maker.wiznet.io/scarlet/projects/rp2040-wifi-loopback-server-use-wizfi360-micropython-1/"
markdown_url: "https://maker.wiznet.io/scarlet/projects/rp2040-wifi-loopback-server-use-wizfi360-micropython-1/md"
type: "UCC: User Created Content"
author: "scarlet"
original_author: "scarlet"
original_url: "https://www.hackster.io/wizscarlet5986/rp2040-wifi-loopback-server-use-wizfi360-micropython-3842bc"
published: "2022-11-25"
language: "en"
tags: ["Wi-Fi", "WizFi360-EVB-Pico"]
hardware: ["WIZnet WizFi360-EVB-Pico"]
likes: 6
views: 3583
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# RP2040 wifi Loopback server (use wizfi360+micropython)

> loopback server simple macropython example using raspberry pico + wifi module. (rp2040 + wizfi360 module)

Original author: scarlet (source: https://www.hackster.io/wizscarlet5986/rp2040-wifi-loopback-server-use-wizfi360-micropython-3842bc)

## Components

- **WIZnet WizFi360-EVB-Pico** x 1
- Software: **MicroPython** ([docs](http://micropython.org/))

## Article

### **Step 1: Prepare software**

The following program is required for Tcp Loopback example test, download and install from below link.

- [**Thonny**](https://thonny.org/)

- [**Hercules**](https://www.hw-group.com/software/hercules-setup-utility/)

### **Step 2: Prepare hardware**

If you are using Wizfi360-EVB-Pico, you can skip '1. Combine...'

1. Combine Wizfi360 with Raspberry Pi Pico.

2. Prepare AP Modem which is connected to Raspberry Pi Pico or Wizfi360-EVB-Pico.

3. Connect Raspberry Pi Pico or Wizfi360-EVB-Pico to desktop or laptop using 5 pin micro USB cable.

### **Step 3: Setup Tcp Loopback Example**

To test the Tcp Loopback example, minor settings shuld be done in code.

Setup AP Modem configuration such as SSID, Password in 'secrets.py' which is the secret settings file in '/lib' directory.

```plaintext
secrets = {
    # Wi-Fi
    "ssid": "my access point",
    "password": "my password",
}
```

- Setup UART port and pin in 'loopback.py' in 'examples/loopback' directory. (Wizfi360-EVB-Pico Using Uart1, Rxpin5, Txpin4)

```plaintext
PORT =1
RX   =5
TX   =4
```

also, setup the Reset pin at the next line (Wizfi360-EVB-Pico Using ResetPin20)

```plaintext
resetpin = 20
```

- Setup TCP server IP and PORT to suit your network environment. You should set the required informaion in 'loopback.py'file.

```plaintext
TARGET_IP = "192.168.11.100"
TARGET_PORT = 5000
```

### **Step 4: Upload and Run**

1. Open loopback server using Hercules. You need to enter the port that was configured in Step 3. (5000 by default)

2. After completing the code example configuration, open 'loopback.py' file on Thonny.

3. Click the 'RUN' button on bar or press the 'F5' button on the keyboard for Run program.

![](https://hackster.imgix.net/uploads/attachments/1526710/image_6iCQGLb5aA.png?auto=compress%2Cformat&w=740&h=555&fit=max)

You send data to the wizfi360, you should be able to receive back the sent message.![](https://hackster.imgix.net/uploads/attachments/1526711/image_UqGXBCu6Ls.png?auto=compress%2Cformat&w=740&h=555&fit=max)

---

Source: https://maker.wiznet.io/scarlet/projects/rp2040-wifi-loopback-server-use-wizfi360-micropython-1/