Serial RS232 / RS422 / RS485 to WiFi Network Device Server ezTCP CSW-H85N

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The EZTCP CSW-H85N is an RS-232 / RS-422 / RS-485 serial to wireless LAN (WiFi) adapter that enables you to add wireless networking capabilities to your industrial equipment via RS232, RS422 and RS485.

By applying this serial to wireless LAN adapter, you can control and monitor your serial devices from anywhere in the world over wireless LAN. The CSW-H85N comes preloaded with Soft AP so that it can simply be linked to any devices with wireless LAN by operating as a virtual AP. Thanks to this feature, it makes it easier for you to construct networks with mobile devices such as smartphones, tablet PCs and laptops where a wireless LAN network is inaccessible.

This serial to wireless LAN adapter offers enhanced security protocol, WPA Enterprise for business purposes to ensure high protection and reliability. With infrastructure and Ad-hoc networking provided, this serial to wireless LAN adapter can be used for various wireless applications such as: Internet Signboards, Energy Management, and Medical Monitoring.


  • IEEE 802.11 b/g
  • Soft AP (setting and connection through a smart phone or laptop without an AP available)
  • Setting up main parameters (IP, SSID and security functions related to WLAN) on the Web
  • Multi-Monitoring (maximum 4 channels)
  • SSL (Secure Sockets Layer)
  • IPv4 / IPv6 dual stack
  • WPA Enterprise (EAP-TLS, EAP-TTLS, PEAP)
  • Separator settings for packet fragmentation
  • 2dBi dipole antenna, Reverse Polarity SMA connector for external antennas
  • Serial to wireless LAN adapter with RS232/RS422/RS485 interface


  • Serial Physical Interface
    • Serial Interface RS232 - RXD, TXD, RTS, CTS, DTR, DSR, GND
    • RS422 - RX+, RX-, TX+, TX-, GND
    • RS485 - TRX+, TRX-, GND
    • ±15KV ESD Protection
  • Serial Port Property
    • Baudrate 300bps ~ 230,400bps
    • Data Bits 8 bits, 7 bits with Parity
    • Parity None, Even, Odd, Mark, Space
    • Stop Bit 1, 1.5, 2
    • Flow Control RTS/CTS (Hardware), Xon/Xoff (Software)
  • Network Interface
    • Wireless LAN Interface IEEE802.11b/g Wireless LAN
    • Supplied with a dipole 2dBi Antenna
    • Reverse Polarity SMA connector for external antennas
  • Software Functions
    • Wireless LAN Mode Ad-Hoc, Infrastructure
    • Soft AP: WEP, Simple DHCP Server
  • Protocols
    • IPv4/IPv6 Dual Stack, ICMPv6/TCPv6/UDPv6
      TELNET COM Port Control Option (RFC 2217)
  • Security
    • WPA-Enterprise: EAP-TLS, EAP-TTLS, PEAP
    • SSL(Secure Socket Layer)
    • IP & MAC Filtering - Restrict Host or Network
    • Password for Configuring
  • Communication Mode
    • TCP Server (T2S)
    • TCP Client (COD)
    • TCP Server/Client with AT Command (ATC) - Patent
    • UDP Mode (U2S)
  • Additional Functions
    • Debug Function
    • Multi Monitoring(Maximum 4 TCP connections simultaneously)
    • TCP Server / Client Mode
    • Separator settings for packet fragmentation
    • Firmware upgrade via Network
    • Sending MAC address Option
    • Factory Reset
  • Indicators (LEDs)
    • Power Red
    • Status Yellow, The current status
    • Wireless LAN Link Green
    • Wireless LAN RXD Yellow
    • Wireless LAN TXD Green
    • Serial RXD Yellow
    • Serial TXD Green
  • Management:
    • ezManager Configuration and Monitoring through Network and Serial
    • AT Command Configuring in ATC Mode - Patent
  • Supplementary Software
    • ezManager Configuration Tool for Windows through Network and serial
    • ezVSP Serial to Network Virtual Driver for Windows
    • ezTerm Simple TCP/IP Communication Test Tool
  • Dimensions
    • Size 88.5mm x 57.0mm x 23.0mm (Without an Antenna)
  • Operating Environments
    • Input Voltage DC 5±0.5V
    • Current Consumption 210mA Typical
    • Operating Temperature -20℃ ~ +60℃
    • Storage Temperature -40℃ ~ +60℃
  • Certifications
    • KC Certificate(KN 301 489-1, KN 301 489-17, KN 32, KN 35, KS X 3123:2018)
    • CE RED 2014/53/EU, RoHS 2011/65/EU
    • FCC FCC Part 15 Subpart C

 Package includes:

1X CSW-H85N Serial WLAN Device Server
1X Dipole Antenna
Delivery is stock to 2 weeks, please contact us prior to ordering for availability. 

Documentation & Resources:


CSW-H85N Introductory video