Flexport HF2211 - Functional Description; Basic Network Protocol; Wireless Network

HF2211 Serial Server Device User Manual
http://www.iotworkshop.com - 18 -
3. FUNCTIONAL DESCRIPTION
The HF2211 has the following feature:
 Connect customer’s device with PC or server via TCP/UDP/Telnet.
 Contain a HTTP web server allow user to configure through browser with PC or phone.
 Have multi-programmable I/O pins used to monitor or control device directly.
3.1. Basic Network Protocol
The HF2211 device uses the IP address for network communications. If uses the TCP to assure that
no data is lost or duplicated. If use UDP to assure that data can be fast and effective to Destination
address.
Supported protocols include:
 ARP, UDP, TCP, ICMP, DHCP, Telnet, DHCP, HTTP Server/Client Web socket
 Telnet command configuration, Web server configuration
 Security Protocol: TLS, AES, DES3 encryption
HF2211
Application
Programming
Interface
Protocols
Security
Configuration
DHCP
IGMP
WebSocket
DNS/DDNS
TCP/IP
HTTP
SSL/TLS
AES
DES
Web
CLI
Telnet
Log
TCP/UDP
IP/ICMP
Ethernet
FreeRTOS OS
Drivers
Cortex-M3 MCU
Figure 10. HF2211 Software Protocol Structure
3.2. Wireless Network
HF2211 can be set as a wireless STA and AP as well. And logically, it supports two wireless interfaces,
one is used as STA and the other is AP. Other STA devices can join into the wireless network through
AP interface. So the it can provide flexible networking method and network topology. Functions is as
follow: