- RS485 to WiFi/Ethernet conversion for flexible communication with WiFi or Ethernet networks.
- WiFi 802.11 a/b/g/n support for high-speed wireless data transfer.
- Ethernet interface: RJ45, 10/100Mbps for stable wired communication.
- RS485 interface for seamless connection with industrial equipment.
- Wide operating voltage range: 9V to 36V DC.
- DIN Rail mountable for easy installation in industrial control panels.
- Support for static IP or DHCP for dynamic IP assignment.
- Multiple configuration options via Web Server or AT commands.
- Low latency communication with minimal transmission delay.
- FOTA (Firmware Over-the-Air) for remote firmware upgrades.

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PUSR
USR-DR404 IOT Din Rail RS485 to WiFi / Ethernet Converter | RS485 to 802.11 a/b/g/n WLAN Serial Device Server
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AI Summary
USB Interface Module for everyday usersThe USR-DR404 IOT Din Rail RS485 to WiFi / Ethernet Converter | RS485 to 802.11 a/b/g/n WLAN Serial Device Server by PUSR is a mid-range usb interface module designed for everyday users. It features Model No. / Name: USR-DR404 and Power Supply Voltage (V): DC 5 to 16.
₹3,822
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Total: ₹3,822
Buying tip: A quality investment for dependable performance and premium build quality.
Estimated delivery: 17 Aug – 31 Aug
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Quick Specs
Model No. / Name: USR-DR404
Power Supply Voltage (V): DC 5 to 16
Serial Port: RS485/RS232
Operating Temperature (°C): -40 to 85
Dimensions (L x W x H) mm: 109.66 x 28 x 64.71
Weight (g): 98
Ideal For
Electronics projectsArduino / Raspberry Pi buildsPrototyping
SKU: robu-2246596Category: USB Interface Module
About This Product
The USR-DR404 IOT Din Rail RS485 to WiFi / Ethernet Converter | RS485 to 802.11 a/b/g/n WLAN Serial Device Server by PUSR is a mid-range usb interface module designed for everyday users. It delivers reliable performance at an accessible price.
Key Specifications
- Model No. / Name: USR-DR404
- Power Supply Voltage (V): DC 5 to 16 — works with standard household power
- Serial Port: RS485/RS232 — compatible with modern devices
- Operating Temperature (°C): -40 to 85
- Dimensions (L x W x H) mm: 109.66 x 28 x 64.71
- Weight (g): 98
- Network Protocol: PPP, PPPoE, TCP, UDP, DHCP, ICMP, NAT, HTTP, DNS, ARP, NTP, Telnet, SSH, DDNS, etc.
- Input current (mA): 127-289 at 5V
Why Buy from Pricio?
Pricio sources this product directly, cutting out multiple middlemen. Every order includes free shipping, a 15-day return policy, and secure payment via Razorpay.
The USR-DR404 is a versatile Din Rail-mounted RS485 to WiFi/Ethernet converter designed for industrial IoT applications. It seamlessly integrates RS485 serial devices with both WiFi and Ethernet networks, enabling real-time data communication in automated systems, remote monitoring, and control environments. This RS485 to 802.11 a/b/g/n WLAN serial device server provides reliable and fast communication, ideal for industries requiring space-saving and efficient data transmission solutions.

Features:
Package Includes:
1 x USR-DR404 IOT Din Rail RS485 to WiFi / Ethernet Converter | RS485 to 802.11 a/b/g/n WLAN Serial Device Server
1 x Wi-Fi Antena
Setup Guide
1
Identify the pins
Locate VCC (power), GND (ground), and data pins (SDA/SCL for I2C, MOSI/MISO for SPI, or TX/RX for UART). Refer to the pinout diagram on the product page.
2
Wire to your microcontroller
Connect VCC to 3.3V or 5V (check the module spec), GND to GND, and data pins to the appropriate GPIO pins on your Arduino or Raspberry Pi.
3
Install libraries
In Arduino IDE, go to Sketch → Include Library → Manage Libraries and search for the sensor library. Install the recommended version.
4
Upload example sketch
Open File → Examples → [library name] → Basic Example. Upload to your board and open Serial Monitor to view output.
5
Calibrate if needed
Some sensors (temperature, humidity, distance) may need a short warm-up period or calibration. Run the calibration sketch if provided.











