---
title: "Neopixel Dimmer #ModbusTCP Slave"
url: "https://maker.wiznet.io/gavinchang/projects/neopixel-dimmer-%23modbustcp-slave/"
markdown_url: "https://maker.wiznet.io/gavinchang/projects/neopixel-dimmer-%23modbustcp-slave/md"
type: "UCC: User Created Content"
author: "jinyistudio.tw"
author_url: "https://www.youtube.com/watch?v=QzV2zwr30Lw"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "jinyistudio.tw"
original_url: "https://www.youtube.com/watch?v=QzV2zwr30Lw"
published: "2023-10-24"
language: "en"
hardware: ["WIZnet W5100S-EVB-Pico"]
likes: 0
views: 359
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Neopixel Dimmer #ModbusTCP Slave

> Neopixel Dimmer #ModbusTCP Slave

Original author: jinyistudio.tw (source: https://www.youtube.com/watch?v=QzV2zwr30Lw)

## Components

- **WIZnet W5100S-EVB-Pico** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5100S/w5100s-evb-pico))

## Article

Neopixel Dimmer #ModbusTCP Slave
evb-pico serves as the modbustcp slave station, and Node-red on the computer serves as the modbustcp master station. Node-red creates four inject buttons R, G, B, and OFF to write to the holding register [0..2] of evb-pico. evb-pico displays asynchronously on LCD1602/I2C and changes the color of Neopixel ring/Output
.
Jinyi Studio

🌐[https://linktr.ee/jinyistudio](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbnNXYTlZblpIX2hPV2RHU2Frd2FuV1R4X0w1UXxBQ3Jtc0ttZTZGUDNjbGF4RmN1cU9GVDkwOUxWaWNZT1pFZkZIcnk4bnNCOWVVdjU3Rl9pdVFTSm5wUGFnM3haeC1LcHM1cWxKLUN4Sk5hMng5dTdTTGsxVGxhMnYxVXkxcXRfNTRwdnRTSXJvdHpXWU11T2s2bw&q=https%3A%2F%2Flinktr.ee%2Fjinyistudio&v=QzV2zwr30Lw)
Micropython 💁‍♂️ pyCopy-modbus
🌐[https://github.com/GimmickNG/pycopy-m...](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbFVxdy0wYzJuSmIxOXRvNnBqa2JpWF9ZOTdXd3xBQ3Jtc0ttTExnaHRzTlk3cnUwZ29hdmdIaDVFTWdCZVY3NUdEY25zMEhIRnQySlY2a2ZodXV5bExPSzZPaVZIZGV6elVaZ3BYN3VMTHFCNjhmMVh1X2Frem5JbHQ0ZVhSWTRPMWpnOVc3VGxpQmlxREhYV1Babw&q=https%3A%2F%2Fgithub.com%2FGimmickNG%2Fpycopy-modbus%2Ftree%2Fmpmodbus-compatibility&v=QzV2zwr30Lw)
Micropython 💁‍♂️ Wiznet W5100S-EVB-Pico
🌐[https://micropython.org/download/W510...](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbW9rVTUtZ3E1U3ZsM0gyRzdjZ1I5U3ZaUG5mUXxBQ3Jtc0tudUdwN0VHUHdZRGVMaE04dUJsOFdoNWdnZnd3ZWY4dW9JRTJ2d2hxbVNhbWxhb0gwTUFDRGRqQUJDWDNxbVNYTTB6N3NVc1dHMmd0T0l1amNvSldQYWlGd1poQzFTQ0QxRnRLNF9wSTY0a3BvZy13MA&q=https%3A%2F%2Fmicropython.org%2Fdownload%2FW5100S_EVB_PICO%2F&v=QzV2zwr30Lw)

---

Source: https://maker.wiznet.io/gavinchang/projects/neopixel-dimmer-%23modbustcp-slave/