1、Adopt for Cortex-M3 MCU (128KB for SRAM) and 2MB Flash. 2、Adopt for FreeRTOS real-time operating system. 3、Support for TCP / for IP / for Telnet / for Modbus TCP protocol. 4、Support serial port to 10 / 100M Ethernet data transmission, serial port speed can be up to 921600 bps. 5、Support 10 / 100M Ethernet self-adaption. 6、Support webpage mode, PC software easy configuration. 7、Support data for SSL / for AES / for DES3 security encryption configuration. 8、Support web OTA wireless upgrade. 9、Support industrial-grade working temperature: -40 to + 85 ℃.  1 x Serial Network Server  1 x Serial Cable  1 x Network Cable  Item Type: HF5111B Serial Server Ethernet Interface Parameters: Ethernet Interface Form: 1 RJ45Interface Standard: 10/100 Base-T auto-negotiationNetwork Port Protection: Static: 8KV contact discharge, 15KV air dischargeNetwork Transformer: IntegratedNetwork Protocols: IP, TCP, UDP, DHCP, DNS, HTTP, Server / Client, ARP, BOOTP, AutolP, ICMP, Web socket, Telnet, for FTP, for TFTP, for UPNP, for NTP, for Modbus TCPData Security Protocol: for AES-128Bit, for DES3, for SSL / TLS v 1.2SNMPV1 / V2 / V3: Not supportedIPV6: Not supportedSerial Interface Parameters: Number Of Serial Ports: 1 (RS232 / 485/422)Interface Standard: RS232: DB9 pin typeRS485 / RS422: 5.08mm terminal blockBaud Rate: 2400-460800bpsSerial Port Protection: Static: 8KV contact discharge, 15KV air dischargeSurge: Differential mode 2KV, common mode 4KVData Bits: 5, 6, 7, 8Stop Bits: 1, 2Parity: None, Even, Odd, Space, MarkFlow Control: No flow control, hardware RTS / CTS, software Xon / Xoff flow controlNetwork Technical Parameters: Working Mode: TCP Server, TCP Client, UDP, HTTP, TelnetdIP Acquisition Method: DHCP or static IP, AutolPDomain Name Resolution DNS: SupportSimple Transparent Transmission Mode: SupportHttp Protocol Transmission Mode: SupportFor Modbus Conversion: SupportWEB Page: Standard web page or custom web pageFailure Alarm: Syslog / SMTPConfiguration Method: WEB page, CLI command, XML file import, Telnet configuration, IOTService configuration softwareCustom Registration Package: SupportCustom Heart Beat: SupportProduct Features: IOT Service: SupportVirtual Data Channel: SupportVirtual Serial Port Software: for Windows XP / for Vista /7/8/10 (32bit \ 64bit), for Win Server 2003/2008/2012