Protoss-PW20&PW21

  • Product Code: Protoss-PW20&PW21
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Product Overview

  • PW2X provides a product for protocol conversion between RS485/RS232 serial ports and TCP/IP, offering a solution for serial devices to transmit data via WIFI. This product boasts a rich communication protocol, supporting TCP, UDP, MQTT, HTTP, virtual serial ports, and other methods for upstream communication. It also supports data transparent transmission for downstream serial devices, Modbus TCP and Modbus RTU conversion, scheduled data collection, and data format conversion. With diverse configuration options, the product can be applied in a wide range of scenarios.
  • PW2X utilizes a highly integrated hardware and software platform. The product supports 802.11b/g/n wireless standards, a complete TCP/IP protocol stack, and multiple data encryption methods to ensure data confidentiality. It has numerous mature use cases in industrial automation, power and energy, rail transit and public facilities, building automation, and other fields.

Overview of Characteristic

  • MIPS MCU with 4MB Flash and 8MB SRAM. Run on eCos
  • Support TCP/UDP/MQTT/HTTP/WebSocket Protocol
  • Support Modbus TCP to RTU, Modbus Master Function
  • Support RS485 to Ethernet/Wi-Fi Conversion, Serial Speed Upto 230400 bps
  • Support STA/AP/AP+STA Mode
  • Support Router or Bridge Network Working Mode.
  • Support 10/100M Ethernet Auto-Negotiation
  • Support Easy Configuration Through a Web Interface or PC IOTService Tool
  • Support Security Protocol Such As TLS/AES/DES3
  • Support  Web OTA Wirelss Upgrade  
  • Multiple Type of Different Power Input：

   Protoss-PW21-H：100～240VAC@50～60Hz

   Protoss-PW21-M：9～48VDC@1A

  • Size: 102.03 x 64.95 x 27.50 mm (L x W x H) ，C45 rail installation


Processor 160MHz
Basic Frequency 448KB
Flash 4MB
SDRAM 8MB
Operating System eCos
Network Protocol TCP/UDP/MQTT/WebSocket/HTTP/Modbus TCP
Security Protocol TLS v1.2 AES 128Bit DES3
Network Mode STA/AP/STA+AP
Transmit Power 802.11b: +18dBm(Max.) 802.11g: +16dBm(Max.) 802.11n: +15dBm(Max.)
Receive Sensitivity 802.11b: -89dBm 802.11g: -81dBm 802.11n: -71dBm
Wi-Fi Security WEP64/WEP128/TKIP/ AES
Port Number PW20:1 RS232 PW21:1 RS485
Data Bits 7，8
Stop Bit 1，2
Check Bit None，Even，Odd
Baud Rate TTL：600bps~230400 bps
Flow Control No Flow control Software Xon/ Xoff flow control
Configuration Web CLI XML import Telnet IOTService PC Software
Size 102.03 x 64.95 x 27.50 mm
Storage Temp. -40 ~ 85°C， 5 ~ 95% RH
Input Voltage Protoss-PW20-H：100～240VAC@50～60Hz Protoss-PW20-M：9～48VDC@1A Protoss-PW21-H：100～240VAC@50～60Hz Protoss-PW21-M：9～48VDC@1A
Working Current ~200mA
Power <700mW
Wi-Fi Standard 802.11 b/g/n
Work Temp. -40 ~ 70°C
User Guide
IOT_Device_Series_Software_Funtion_20250328 [ Download Times: 56580,  Date Update: 2025-11-06 15:45:30 ]
PW2X_HF2211_HF2221_HF9610_Operation Guide_20200623 [ Download Times: 12123,  Date Update: 2020-06-23 18:29:16 ]
Protoss-PW2X User ManualV1.0_20251231 [ Download Times: 109,  Date Update: 2026-01-05 15:59:37 ]