• Product Code: Protoss-PW21
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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 RTUModbus 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:




  • 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
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 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-PW21-H: 100~240VAC@50~60Hz Protoss-PW21-M: 9~48VDC@1A Protoss-PW21-L:9~24VDC@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_20200623 [ Download Times: 45456,  Date Update: 2020-06-23 18:28:00 ]
PW2X_HF2211_HF2221_HF9610_Operation Guide_20200623 [ Download Times: 10281,  Date Update: 2020-06-23 18:29:16 ]
Protoss-PW21 User ManualV1.3(20240112) [ Download Times: 713,  Date Update: 2024-02-22 13:27:02 ]