---
title: "Customized 4 channel Relay board with ESP32 Wifi/Bluetooth/Ethernet RJ45/RS485/SMA antenna and batte"
url: "https://maker.wiznet.io/annjaison/resellers/customized-4-channel-relay-board-with-esp32-wifi-bluetooth-ethernet-rj45-rs485-sma-antenna-and-batte/"
markdown_url: "https://maker.wiznet.io/annjaison/resellers/customized-4-channel-relay-board-with-esp32-wifi-bluetooth-ethernet-rj45-rs485-sma-antenna-and-batte/md"
type: "VAR: Value-Added Reseller Products"
author: "annjaison"
original_url: "https://www.alibaba.com/product-detail/Customized-4-channel-Relay-board-with_1600564278773.html"
published: "2023-02-01"
language: "en"
likes: 3
views: 287
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Customized 4 channel Relay board with ESP32 Wifi/Bluetooth/Ethernet RJ45/RS485/SMA antenna and batte

> The ER-01 is the customization products which combine with ESP32 chips(wifi and bluetooth), Ethernet LAN W5500, RS485 comminication methods.

Original source: https://www.alibaba.com/product-detail/Customized-4-channel-Relay-board-with_1600564278773.html

---

Source: https://maker.wiznet.io/annjaison/resellers/customized-4-channel-relay-board-with-esp32-wifi-bluetooth-ethernet-rj45-rs485-sma-antenna-and-batte/