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Serial WLAN Device Server

Serial WLAN Device Server – Wireless Serial to TCP/IP Converter (RS232 / RS422 / RS485)

A Sollae serial WLAN device server converts RS232, RS422, or RS485 serial data into TCP/IP traffic over Wi-Fi, letting you monitor and control legacy equipment from any networked device — without running Ethernet cable.

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What Serial WLAN Device Servers Do in Practice

Teams buy serial to WiFi converters to connect serial-only equipment to an IP network when wiring is impractical, expensive, or simply too slow. Common deployment scenarios include:

  • Remote monitoring and control of meters, controllers, displays, and instruments over Wi-Fi
  • Temporary or mobile installations (pilot projects, rental sites, moving machinery) where Ethernet cabling is not viable
  • Retrofits of older RS485 devices so data can flow into SCADA systems, dashboards, or IT platforms
  • Hard-to-wire locations — large facilities, historic buildings, outdoor cabinets — where Wi-Fi saves deployment time

Wireless Serial Converter Modes: TCP Server, TCP Client, and UDP

Choosing the right connection mode determines deployment success. Sollae wireless serial converters support the patterns used most by system integrators and IT/OT teams:

Mode quick-reference: TCP Server — your software connects to the device (most common). TCP Client — the device initiates the connection to your host (useful behind NAT). UDP — lightweight datagrams for telemetry. RFC2217 — exposes the remote port as a local COM port for legacy Windows apps.

Compare Serial WLAN Device Server Models

Model Interface Standout features Best for
CSW-H85N RS232 / RS422 / RS485 → Wi-Fi (802.11 b/g) → IP Soft AP, SSL, IPv4/IPv6, WPA-Enterprise, up to 4 monitoring channels Cost-sensitive projects needing enterprise security
CSW-H85F RS232 / RS422 / RS485 → Wi-Fi (802.11 b/g) → IP Soft AP, RSSI mode, external antenna support, WPA-Enterprise Field installs where signal visibility and easy setup matter
CSW-H85K2 RS232 / RS422 / RS485 → Wi-Fi (802.11 b/g) → IP RSSI, Soft AP, IPv4/IPv6, RS485 biasing, TVS and ±15 kV ESD protection Industrial RS485/RS422 networks where robustness is critical
CSC-H64 4× RS232/RS422/RS485 → Ethernet or WLAN (USB Wi-Fi dongle required) 4 ports, Soft AP, Virtual COM (ezVSP), industrial temperature range −40 °C to +85 °C Multi-device cabinets: consolidate several serial devices in one node

Security for Industrial Wi-Fi: WPA-Enterprise, IPv6, Soft AP

Wi-Fi in OT environments is only useful when it is stable and controlled. Sollae serial WLAN device servers cover the security features that matter in real rollouts:

  • WPA-Enterprise (EAP-TLS / EAP-TTLS / PEAP) for corporate Wi-Fi policies
  • Soft AP commissioning — configure on-site without a pre-existing access point
  • IPv4/IPv6 dual stack for compatibility with modern IT/OT infrastructure
  • External antenna support on select models for better signal coverage or cabinet-friendly placement

Buyer Checklist: Serial WLAN Device Server

  1. Serial interface: RS232, RS485, or RS422 — and whether you need surge or ESD protection.
  2. Connection mode: TCP Server, TCP Client, UDP, or RFC2217 — choose based on how your software initiates connections.
  3. Security policy: WPA-Personal or WPA-Enterprise; add SSL/TLS if data leaves a protected LAN.
  4. Commissioning method: Soft AP is a significant time-saver when there is no infrastructure Wi-Fi on-site during installation.
  5. Port count: one port (CSW models) for simple retrofits; four ports (CSC-H64) to consolidate a cabinet.
Quick pick: Connecting one device? Start with a CSW model for the fastest single-port retrofit. Managing several serial devices in one cabinet? Choose the 4-port CSC-H64.

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