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🔧 Project Overview

This tutorial guides users through setting up the W55RP20-EVB-Pico development board to control three LEDs via TCP commands sent over a wired Ethernet network. It's an excellent starting point for those interested in exploring IoT concepts, especially using Ethernet-based communication.Cytron Technologies Malaysia

🧩 Hardware Components

To build this project, you'll need:

W55RP20-EVB-Pico board

3x LEDs

3x 220Ω resistors

USB Type-C cable

Ethernet cable

Jumper wires

Breadboard (optional)How2Electronics+14Cytron Technologies Malaysia+14Cytron Technologies+14Adafruit Learning System+2The Pi Hut+2Electronic Clinic+2Cytron Technologies+2Cytron Technologies Malaysia+2Cytron Technologies+2

The W55RP20-EVB-Pico integrates the RP2040 microcontroller with the W5500 Ethernet controller, providing built-in Ethernet support ideal for IoT applications. Cytron Technologies Malaysia+2Cytron Technologies+2CNX Software - Embedded Systems News+2

🛠️ Firmware Installation

Download CircuitPython Firmware:

Visit the CircuitPython downloads page and download the latest .uf2 firmware file suitable for the W55RP20-EVB-Pico.Tom's Hardware+16Cytron Technologies Malaysia+16EDU PICO Project & Innovation Kit+16

Enter Bootloader Mode:

Connect the board to your computer via USB.

Press and hold the BOOTSEL button, then press and release the RUN button.

The board will appear as a RPI-RP2 drive on your computer.Cytron Technologies+3Cytron Technologies Malaysia+3EDU PICO Project & Innovation Kit+3

Flash Firmware:

Drag and drop the downloaded .uf2 file onto the RPI-RP2 drive.

The board will reboot and appear as a CIRCUITPY drive, indicating that CircuitPython is running.Cytron Technologies Malaysia+1Cytron Technologies+1

🖥️ TCP Server Implementation

With CircuitPython installed, the next step is to program the board to function as a TCP server:

Set Up Ethernet Communication:

Utilize CircuitPython's networking libraries to establish Ethernet connectivity.How2Electronics+18Cytron Technologies Malaysia+18Cytron Technologies Malaysia+18

Create TCP Server:

Write a script that listens for incoming TCP connections on a specified port.

Parse received commands (e.g., "LED1 ON", "LED2 OFF") to control the corresponding GPIO pins connected to the LEDs.

Send acknowledgment responses back to the client confirming the action taken.Cytron Technologies Malaysia+1CNX Software - Embedded Systems News+1

This setup allows remote clients, such as computers or smartphones, to control the LEDs by sending appropriate TCP commands over the network. Cytron Technologies Malaysia

🌐 Practical Applications

This project serves as a foundational example for various IoT applications, including:

Smart Home Lighting Systems:

Control home lighting remotely over a network.

Industrial Automation:

Manage machinery indicators or status lights in an industrial setting.

Educational Tools:

Teach students about networking, microcontrollers, and IoT concepts through hands-on experience.Cytron Technologies+4Cytron Technologies Malaysia+4Cytron Technologies Malaysia+4

📚 Learn More

For detailed instructions, code examples, and further information, refer to the full tutorial on Cytron's website: Simple IoT LED Control with W55RP20-EVB-Pico and CircuitPython.