---
title: "Assembling a multi-channel I2C and ModBus relay on the LavriBoard V7.1 board"
url: "https://maker.wiznet.io/praveen_k/projects/Assembling-a-multichannel-I2C-and-ModBus-relay-on-the-LavriBoard-V71-board/"
markdown_url: "https://maker.wiznet.io/praveen_k/projects/Assembling-a-multichannel-I2C-and-ModBus-relay-on-the-LavriBoard-V71-board/md"
type: "UCC: User Created Content"
author: "praveen_k"
original_author: "praveen_k"
original_url: "https://www.youtube.com/watch?v=PwuIIIfRSX8&ab_channel=LavritechPlatform"
published: "2022-02-26"
language: "en"
hardware: ["WIZnet W5500", "Espressif ESP32", "6 channel modbus relay", "wiren board modules"]
likes: 0
views: 208
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Assembling a multi-channel I2C and ModBus relay on the LavriBoard V7.1 board

> Assembling a multi-channel I2C and ModBus relay on the LavriBoard V7.1 board

Original author: praveen_k (source: https://www.youtube.com/watch?v=PwuIIIfRSX8&ab_channel=LavritechPlatform)

## Components

- **WIZnet W5500** x 1 ([docs](https://docs.wiznet.io/Product/Chip/Ethernet/W5500))
- **Espressif ESP32** x 1 ([docs](https://www.espressif.com/en/products/socs/esp32))
- **6 channel modbus relay** x 1
- **wiren board modules** x 1

WIZnet parts: W5500 ([Datasheet](https://docs.wiznet.io/Product/Chip/Ethernet/W5500/datasheet?utm_source=maker&utm_medium=project&utm_campaign=w5500), [product hub](https://maker.wiznet.io/products/w5500/))

## Article

http://Video link: https://www.youtube.com/watch?v=PwuIIIfRSX8&ab_channel=LavritechPlatform Assembly of a multi-channel I2C and ModBus relay on the LavriBoard V7.1 board using the ESP32 DEVKIT-C module, W5500 Ethernet module, WirenBoard I2C modules based on PCP23008 port expanders and WirenBoard ModBus relay. - Link to motherboard description[https://lavritech.com/hardware-platfo...](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbmpKNmdqMU94cEpfREJ4S01IRlItZVJYdEdlZ3xBQ3Jtc0ttbzRtQXpkWlVRVHhOTlBHaDhSYUR6TTdQWDNfTjh2bE9ZSHEtMnVlVHVFYXdIenpPczYySXJreGdPcF9PRkg3Y1RNUkZ4SkpoaEViaDdnb2tDd0RJQUJvZ25jdC0xa3Q4YkwzRTYyOGRTQnRWX0I0MA&q=https%3A%2F%2Flavritech.com%2Fhardware-platform%2Fmaterinskaya-plata-mb-v6-4-socket-38pin) - Telegram channel of the project [https://t.me/iothp](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbndISHJYVzRJemt5dGdxWEpUNzZ2SkNORjBNd3xBQ3Jtc0trTnA2THNMdFpXZm95aHlLQWtvRk9jSkl4RHZZRVU1Umd5MXFiTXhEYmp3QzBHZjZlZkFzZzF1VGJzM1VFTmp5MlpWTXNfSkpoZTlsX2trZF9Edno1VWxSSS0tYWduWU9YNzJZSW9EbjJaWmh4RzktMA&q=https%3A%2F%2Ft.me%2Fiothp) - Platform based firmware[https://wifi-iot.com](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqa0EtTGxZdUZwanBjR2lRR2dZcDh1eDBPSkdKZ3xBQ3Jtc0tuTDcyaFpGcG5FOHBRd1NNcU9MTkN6VlBGZGlKNHBaUDd1NjdOVkpBRlFzajdNYkNSYVhmbThsU1pvQWgyS1JSOXF4bm5lOU1Lc0xsRWJlYnFzQjEtaHVpRWt6MTdhRG9peWY5S2FjcHlCMTJIR3IyRQ&q=https%3A%2F%2Fwifi-iot.com) - Ethernet module W5500[https://aliexpress.ru/item/3295031663...](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqblFfMnRkSzg3djJYQ1FJczN3YnVDdEZ6bkdBZ3xBQ3Jtc0tsQnJwTW5uOUh3NnAzNi1LbG9JWFFtSE15TnczQm5CZUFneWoxTkpUaEQtcTZ5NVdWYkZjQ2E3ajhyR0VqYVVmczVGR0tRYmJtN1B4NjRQOUFWN2VVWHZtLTlJN3RCZlpTV3pFX2JzdUx5b3JkYkJrWQ&q=https%3A%2F%2Faliexpress.ru%2Fitem%2F32950316631.html) - ESP32 module[https://aliexpress.ru/item/1005001393...](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbEdDem4waDlhZlFqSEctd3VqVDhGTktESEpLZ3xBQ3Jtc0ttT0J6R0RxWktyRzNTWVV5Ynd3RGQ5WWxHUUJqMHgxRHZTc2duakt6djRuRzNCcE5GWXhaRmVORDJJdFU1N0g1T2dySFd4a0hfXzZRMnI2M1NFRW5OMENJN1MxNDVxdVVRRkJqaTUtVlVnWld4SFhjdw&q=https%3A%2F%2Faliexpress.ru%2Fitem%2F1005001393009548.html) WirenBoard modules used in video: - Electromagnetic I2C 6-channel relay[https://wirenboard.com/ru/product/WBI...](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbWNtMWgybWwzOEt0TDlxZUNHOU5PV3BKWmFLQXxBQ3Jtc0ttRzMzajVjQlZGMmpDampwZzdTX0xsbDE1ZGRaSWp0dXkxOHllNXdsSU54RGd2UmhTUk5zNXYzVk1Hbzlpc240NUFwbWYyOE5JTjhmejFzNmpEeFhGMS1NQ1A0RXRkVThsZkYwQVpkS2FXQTFGbWRqRQ&q=https%3A%2F%2Fwirenboard.com%2Fru%2Fproduct%2FWBIO-DO-R10A-8%2F) Solid state I2C 6-channel relay WBIO-DO-SSR-8[https://wirenboard.com/ru/product/WBI...](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqazN0RXRMdUFPaTRwVllWRmNlYTNBZ2d1a3gzQXxBQ3Jtc0trUVdfaG5NQmdCOWlxSTJneUp3eVJYM1FjLXlmd1NELWNWT09BRHduQmJSXzZqdmF2YWZDcTV4NllDWGNCSFczbnlDMGFSR0c0YVFUcEVpNkRHUGVmVnh2M25HYkF6Ti1WUXY5N1RKMjlxMDlvQU13OA&q=https%3A%2F%2Fwirenboard.com%2Fru%2Fproduct%2FWBIO-DO-SSR-8%2F) - 6-channel ModBus relay WB-MR6C_v2[https://wirenboard.com/ru/product/WB-...](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqa1FmTWVKQVQwUGdkVnZXcEtNYVlzcW5JZE9xd3xBQ3Jtc0tsbm5XcHJCWkNYX21TY0plZUJuSHNTajNyT0FOY053VlQ4ZjBzdThtZlBYX2ZoLW43YVFobDZ5LW5iTlBnRjFEMWJqV3RENDZjbHVQYjlsa0VORVpqNTJDb1Iwa19ZeUZsS1JMZVNzb2J3RXpkYVdkNA&q=https%3A%2F%2Fwirenboard.com%2Fru%2Fproduct%2FWB-MR6C_v2%2F) RS-485 expansion module[https://wirenboard.com/ru/product/WBE...](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqa0ExTm1sT1diMXpuVEJBcTYtd1RjMW4tNC11UXxBQ3Jtc0ttWF8xOW9yMWFUMEFjZ290VHZkS2R2SnVJZnExV1VVdU1VTk1wcnJmU0c5d1hBR3FUM3l3czUzLW9wcW04ZEZTb25OcWZfc3NYYnZnTzRUMU5KS0llTVFUbl9yVVBhVmNPbXRBTXFGU0pqdGp2d1B4RQ&q=https%3A%2F%2Fwirenboard.com%2Fru%2Fproduct%2FWBE2-I-RS485-ISO%2F)

---

Source: https://maker.wiznet.io/praveen_k/projects/Assembling-a-multichannel-I2C-and-ModBus-relay-on-the-LavriBoard-V71-board/