--- product_id: 714104035 title: "Ethernet Industrial Serial Server RS485 to RJ45 Ethernet Module, TCP/IP to Serial, Support Rail-Mount/Modbus Gateway, TCP Server/TCP Client/UDP Mode/UDP Multicast Multi Communication Modes" brand: "waveshare" price: "R1588" currency: ZAR in_stock: true reviews_count: 5 category: "Waveshare" url: https://www.desertcart.co.za/products/714104035-ethernet-industrial-serial-server-rs485-to-rj45-ethernet-module-tcp store_origin: ZA region: South Africa --- # 2KV surge protection 10/100M Ethernet auto-negotiation Multi-protocol TCP/UDP/Modbus/MQTT Ethernet Industrial Serial Server RS485 to RJ45 Ethernet Module, TCP/IP to Serial, Support Rail-Mount/Modbus Gateway, TCP Server/TCP Client/UDP Mode/UDP Multicast Multi Communication Modes **Brand:** waveshare **Price:** R1588 **Availability:** βœ… In Stock ## Summary > πŸš€ Elevate your industrial network with Waveshare’s all-in-one smart serial server! ## Quick Answers - **What is this?** Ethernet Industrial Serial Server RS485 to RJ45 Ethernet Module, TCP/IP to Serial, Support Rail-Mount/Modbus Gateway, TCP Server/TCP Client/UDP Mode/UDP Multicast Multi Communication Modes by waveshare - **How much does it cost?** R1588 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/714104035-ethernet-industrial-serial-server-rs485-to-rj45-ethernet-module-tcp) ## Best For - waveshare enthusiasts ## Why This Product - Trusted waveshare brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Multi-Host & Cloud Ready:** User-defined heartbeat and roll-polling eliminate crosstalk, enabling smooth multi-device cloud communication. - β€’ **Robust Rail-Mount Design:** Compact, flame-retardant casing with easy rail-mount installation for scalable industrial setups. - β€’ **Dynamic Network Configuration:** Web browser setup with DHCP/DNS support and NTP synchronization ensures hassle-free deployment. - β€’ **Versatile Multi-Protocol Gateway:** Supports TCP server/client, UDP, UDP multicast, Modbus, MQTT, and JSON conversions for ultimate connectivity. - β€’ **Seamless Industrial IoT Integration:** Bi-directional RS485 to Ethernet data transmission for real-time control and monitoring. ## Overview The Waveshare Ethernet Industrial Serial Server RS485 to RJ45 module is a compact, rail-mountable IoT gateway designed for harsh industrial environments. It enables bi-directional transparent data transmission between RS485 serial devices and Ethernet networks, supporting multiple communication protocols including TCP/IP, UDP, Modbus, and MQTT. Featuring 10/100M Ethernet with 2KV surge protection, flexible web-based configuration, and multi-host roll-polling, it streamlines industrial data acquisition, device monitoring, and protocol conversion with reliable performance from -40Β°C to 85Β°C. ## Description Overview This is a RS485 device data acquisitor / IoT gateway designed for industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc. The module features RS485 and Ethernet ports, uses screw terminals for power input, supports 924V wide range power supply. Rail-mount flame-retardant case design, small in size, easy to install. It is suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring.etc. Specifications 1.Primary Introduction Product Type--- Serial server, Modbus Gateway, MQTT Gateway Basic Function--- Bi-directional transparent data transmission between RS485 and Ethernet Communication interface --- RS485 port x 1, Ethernet port x 1 Power supply --- 9 24V DC screw terminal 2.Communication Ethernet--- common network port, 10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection. Serial port--- RS485. 3.Serial specification Baudrate---300 115200 bps Parity bit--- none, odd, even, mark, space Data bit--- 5 9 bits 4.Software Protocol--- ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS Configuration--- host, web browser, device management functions library Communication method--- TCP/IP direct communication, VCOM Operating mode--- TCP server, TCP client (coexisting with TCP server), UDP, UDP multicas 5.Environment requirement Operating temperature--- -40℃ 85℃ Storage temperature: -45℃ 125℃ Humidity range--- 5% 95% relative humidity Dimensions --- L x W x H--- 87x 36 x 59 mm Online Document/How to use: //bit.ly/3rWrjyz Package Content RS485 TO ETH (B) x1 Review: Great modbus to ethernet Gateway - Perfect solution for my home automation need. This interface only took a few minutes to get programmed and communicating properly and has been holding up great for several months in a garage. Review: Great device! - Immediately there's one problem, and I don't understand why Chinese manufacturers do this: The IP address is set statically at 192.168.1.254 rather than using DHCP. Even when set to DHCP, it does not properly pull DNS servers from DHCP and has it set statically to 192.168.1.3, which doesn't matter much because it doesn't need DNS, but still. It's such a weird default that the rest of the world does not use. Ethernet devices should start with DHCP, and they should always pull DNS from DHCP unless set statically after DHCP config. After that, everything is excellent. Just beware that the ground plug on top of this is not the same as the negative of the input voltage. Make sure your modbus sensor/device is powered the same way this is powered. Honestly, a great device and exactly what I needed for testing a modbus TCP implementation. ## Features - This is an RS485 device data acquisitor / IoT gateway designed for the industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc. Bi-directional transparent data transmission between RS485 and Ethernet. - Support Rail-mount :easy to combine multi rail-mounted serial server together, more freely. Support Modbus gateway: suitable for Modbus gridding upgrade, can be used with 3D configuration software. Support NTP protocol: getting network time info for serial output or data upload. - Multi communication modes: supports TCP server / TCP client / UDP mode / UDP multicast. Multi configuration methods: supports Web browser configuration, obtaining dynamic IP via DHCP,DNS protocol connected domain server address. MQTT/JSON to Modbus: more flexible conversion between different protocols. - Multi hosts roll-polling support: different network devices will be identified and responsed respectively, no more crosstalk issue while communicating with multi network devices - User-defined heartbeat/registration packet: easy for cloud communication and device identification. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09MBW9WFL | | Brand | Waveshare | | Color | RS485 TO ETH (B) | | Colour | RS485 TO ETH (B) | | Customer Reviews | 4.6 out of 5 stars 28 Reviews | | Data Transfer Rate | 100 Megabits Per Second | | Data transfer rate | 100 Megabits Per Second | | Hardware Interface | Ethernet | | Hardware interface | Ethernet | | Item Weight | 0.01 Kilograms | | Item weight | 0.01 Kilograms | | Manufacturer | Waveshare | | Mfr Part Number | RS485 to ETH RJ45 (B) | | Model Number | RS485 to ETH RJ45 (B) | | Unit Count | 1 Count | | Unit count | 1 Count | ## Product Details - **Brand:** Waveshare - **Colour:** RS485 TO ETH (B) - **Item weight:** 0.01 Kilograms - **Manufacturer:** Waveshare - **Unit count:** 1 Count ## Images ![Ethernet Industrial Serial Server RS485 to RJ45 Ethernet Module, TCP/IP to Serial, Support Rail-Mount/Modbus Gateway, TCP Server/TCP Client/UDP Mode/UDP Multicast Multi Communication Modes - Image 1](https://m.media-amazon.com/images/I/61DKLzjxnQL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great modbus to ethernet Gateway *by R***. on 22 June 2026* Perfect solution for my home automation need. This interface only took a few minutes to get programmed and communicating properly and has been holding up great for several months in a garage. ### ⭐⭐⭐⭐⭐ Great device! *by R***T on 6 May 2026* Immediately there's one problem, and I don't understand why Chinese manufacturers do this: The IP address is set statically at 192.168.1.254 rather than using DHCP. Even when set to DHCP, it does not properly pull DNS servers from DHCP and has it set statically to 192.168.1.3, which doesn't matter much because it doesn't need DNS, but still. It's such a weird default that the rest of the world does not use. Ethernet devices should start with DHCP, and they should always pull DNS from DHCP unless set statically after DHCP config. After that, everything is excellent. Just beware that the ground plug on top of this is not the same as the negative of the input voltage. Make sure your modbus sensor/device is powered the same way this is powered. Honestly, a great device and exactly what I needed for testing a modbus TCP implementation. ### ⭐⭐⭐⭐⭐ Working well, though rx/tx indication a bit confusing *by Y***V on 24 February 2024* I'm working on a personal project with the Modbus functionality. The device I'm working on was tested with the Serial to RS485 dongle and working fine. I added the RS485 to the RJ45 Ethernet Module (waveshare), enabled the Modbus TCP to RTU mode, set the device address, and sent the following command: `modbus 192.168.6.35:2020 -s213 h@13` The "waveshare" is able to transmit data to my device, and my device successfully processes the command responding with the correct Modbus response: [23:50:09][D][uart_debug:114]: <<< D5:03:00:0D:00:01:07:DD [23:50:09][D][uart_debug:114]: >>> D5:03:02:08:27:CF:8C However, the "waveshare" device, seems, to either have a defective RX port or can not transmit the response back. I tried modbus_cli and ModbusMechanics. Both fail with the "waveshare" device but work with the USB458 dongle. *Correction*: Looks like it was a subtle bug with the particular Modbus library on my device and/or the device(s). Even though the USB dongle works correctly, another device from a different vendor behaves the same way. Setting 2 stop bits helped. I assume the "waveshare" device would work perfectly with this setup. Sorry for the initial negative review. ## Frequently Bought Together - waveshare Ethernet Industrial Serial Server RS485 to RJ45 Ethernet Module, TCP/IP to Serial, Support Rail-Mount/Modbus Gateway, TCP Server/TCP Client/UDP Mode/UDP Multicast Multi Communication Modes - GUETNEU Terminal Block, Rail Type Voltage Terminal, Rail Combined Terminal Block - T&G 10 Pieces DIN Rail Slotted Aluminum RoHS 8" Inches Long 35mm Wide 7.5mm High --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/714104035-ethernet-industrial-serial-server-rs485-to-rj45-ethernet-module-tcp](https://www.desertcart.co.za/products/714104035-ethernet-industrial-serial-server-rs485-to-rj45-ethernet-module-tcp) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-10-21*