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Serial WiFi Adapter - RS232 - 4th generation

  • Model: S2W232E-ESP32
  • In Stock


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This is our standard version serial to WiFi adapter. It has most of the commonly used serial parameters so it can be used with almost any serial device, both legacy devices and new devices.

As our other serial WiFi adapters this adapter can be used for connecting a standard RS232 serial device to your computer over a wireless access point or network. It will work with most RS232 serial devices and is an ideal solution for many applications including factory automation, office, laboratory, warehouse and most other commercial and consumer applications and environments.
It can be used in pairs in a point to point setup as a direct cable replacement or standard ad-hoc and infrastructure networks; you can even use it to access your serial device over the Internet through a wireless router.

The adapter's parameters can be configured using a standard web-browser. The VCOM software utility works with Windows but the adapter itself (not the VCOM software) is transparent to the operating system so once the parameters are configured the adapter works with Windows, Mac, Linux, Android, iOS and most other WiFi enabled devices and applications (without VCOM software), which is great for machine to machine communication. Notice that the virtual COM port software included with the software utility only works with Windows.

The free downloadable VCOM software is a full working version of the virtual COM port software which creates a virtual COM port in Windows. The virtual COM port can then be used almost as if it was a regular native serial COM port.
This adapter also works with several versions of 3rd party VCOM software (only tested with Windows).

A mini USB cable is included for powering the adapter, alternatively a standard mini USB 110VAC/5VDC power supply adapter can also be used. Alternatively this serial to WiFi adapter can be powered by 5 - 40VDC through the screw terminals on the side of the adapter or by pin 9 in the DB9 connector.

serial wifi setup

Overall features
  • All standard commonly used parameters available
  • AP and Station mode (Adhoc /Infrastructure)
  • Compatible with all IEEE 802.11 b/g/n devices
  • Free downloadable virtual COM port software
  • Supports Open, WPA, WPA2, AES
  • Built-in Full TCP/IP stack, no external drivers required
  • Works with most mobile devices / operating systems
  • Parameters configurable by web browser
  • LED status lights
  • Wide voltage range: 5 to 40VDC
  • Can be powered via screw terminals, DB9 or USB
Included items
  • Serial WiFi adapter
  • 2 dBi di-pole antenna
  • Mini USB cable (for power only)
  • Quick reference sheet


Useful optional accessories
(not included)

usb power supply
USB mini 110V/5VDC Power adapter

Battery pack
Rechargeable battery pack

gender changer
Gender Changer

null modem adapter
Null modem adapter
Part number S2W232E-ESP32
Operating system VCOM software for: Windows 11, Windows 10, Windows 8/8.1, Windows 7 (32/64-bit)
App available for Android and iOS
Processor ESP32-D0WDQ6-V3 by Espressif
Xtensa® 32-bit LX6 microprocessor
- 448 KB ROM
- 520 KB SRAM
- 16 KB SRAM in RTC
Network IEEE 802.11 b/g/n
Frequency 2.412 - 2.484 GHz
Channels 1 - 14
Security Open, WPA, WPA2, AES
Protocols TCP Server, TCP Client, UDP Server, UDP Client, Http Client
Network modes AP, Station (Adhoc, Infrastructure)
Server/client mode Yes
Max simultaneous clients 4
Output TX power 802.11b: +19dBm(Max.@11Mbps,CCK)
802.11g: +18dBm(Max.@54Mbps,OFDM)
802.11n: +16dBm(Max.@HT20,MCS7)
Receive sensitivity 802.11b: -85 dBm(@11Mbps,CCK)
802.11g: -70 dBm(@54Mbps,OFDM)
802.11n: -68 dBm(@HT20,MCS7)
Baud rate 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400 bps
Data bits 5, 6, 7, 8
Parity None, even, odd
Stop bits 1, 1.5, 2
RS232 Signals TX, RX, CTS, RTS, GND
Flow control None, RTS/CTS
DCE/DTE Manual switch
Buffer size 8KB
Serial port 1-port RS232 male D-sub 9-pin with thumb-screws
Operating distance Up to 330 feet (100 meters)
Parameter configuration Web browser over WiFi
Antenna 2.4Ghz, 2dBi di-pole with Reverse Polarity SMA (RP-SMA) male connector (inside threads / center receptacle)
Antenna connector type on adapter Reverse Polarity SMA (RP-SMA) female connector (outside threads / male pin)
Power supply 5 to 40VDC by screw terminals, DB9 or mini USB
Power consumption AP: 74mA (average), 285mA (peak)
STA: 32mA (average), 196mA (peak)
Operating temp. -20°C to 85°C
Weight 43g including antenna
Dimensions 81.6 x 31.75 x 17 mm
Certifications CE, FCC, ROHS

For alternative wireless serial solutions please see our full selection of wireless RS232 adapters.


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