Wiznet makers

How to Run Loopback Example

This project uses the Raspberry Pi Pico as the main controller to operate the W55RP20-S2E module. Connect to the W55RP20-S2E module via SPI or UART communication to implement TCP Client, TCP Server, and UDP Loopback functionality.

Step 1: Prepare Software

Download and install the following software:

Required Software:

• Arduino IDE
• Tera Term - Serial terminal program
• Hercules - UDP/TCP test utility

Step 2: Arduino IDE Setup

Install Board Support Package

1. Open Arduino IDE
2. Go to File → Preferences
3. Add the following to "Additional Boards Manager URLs": https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
4. Go to Tools → Board → Boards Manager
5. Search for "Raspberry Pi Pico" and install Raspberry Pi Pico/RP2040 by Earle F. Philhower, III
6. Select Tools → Board → Raspberry Pi RP2040 Boards → Raspberry Pi Pico

Step 3: Hardware Connections

2.1 SPI Mode Connection

When controlling the W55RP20-S2E module via SPI, connect as follows:

2.2 UART Mode Connection

When controlling the W55RP20-S2E module via UART:

Step 4: Code Examples

Each example provides a .ino file to upload to the Pico.

Step 5: Upload and Test

4.1 Select Raspberry Pi Pico

1. Go to Tools → Board → Raspberry Pi RP2040 Boards → Raspberry Pi Pico
2. Select Tools → Port → Choose your COM port

4.2 Upload Code

1. Open the desired example .ino file
2. Modify IP addresses and port numbers as needed
3. Click Upload button or press Ctrl+U
4. Wait for upload to complete

4.3 Open Serial Monitor

1. Go to Tools → Serial Monitor
2. Set baud rate to 115200
3. Verify network information and connection status

Step 5: Testing with Hercules

TCP Client Test

Hercules Server Setup:

// 이미지 첨부

1. Launch Hercules
2. Select TCP Server tab
3. Port: 5000
4. Click Listen
5. Verify messages from Pico appear
6. Type response message and click Send

Expected Results:

• Hercules receives "Hello from Pico + W55RP20..." message
• Serial Monitor displays Hercules response

TCP Server Test

Hercules Client Setup:

//이미지 첨부

1. Launch Hercules
2. Select TCP Client tab
3. IP: 192.168.11.2 (Pico IP address)
4. Port: 5000
5. Click Connect
6. Type message (e.g., "Test from Hercules")
7. Click Send

Expected Results:

• Serial Monitor displays "Test from Hercules"
• Hercules receives echoed message

UDP Test

Hercules UDP Setup:

//이미지 첨부

1. Launch Hercules
2. Select UDP tab
3. Module IP: 192.168.11.2
4. Module Port: 5000
5. Local Port: 5000 (or other available port)
6. Type message (e.g., "UDP Test Message")
7. Click Send

Expected Results:

• Serial Monitor displays "UDP Test Message"
• Hercules receives echoed packet