HF2221 Serial Server Device User Manual
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HF2221
Serial Server Device User Manual
V 1.2
Overview of Characteristic
MIPS MCU with 4MB Flash and 8MB SRAM. Run on eCos
Support TCP/IP/Telnet /Modbus TCP Protocol
Support 2 channel RS232/RS422/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 2 Channel 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
HF2221 Serial Server Device User Manual
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Wide DC Input 5~36VDC
Size: 108 x 146 x 25 mm (L x W x H)
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TABLE OF CONTENTS TABLE OF CONTENTS
TABLE OF CONTENTS TABLE OF CONTENTS ........................................................................... 3
LIST OF FIGURES ............................................................................................................................ 4
LIST OF TABLES ............................................................................................................................. 5
HISTORY ........................................................................................................................................... 5
1. PRODUCT OVERVIEW ........................................................................................................ 6
1.1. General Description ......................................................................................................... 6
1.2. Device Paremeters ........................................................................................................... 6
1.3. Key Application ................................................................................................................ 7
2. HARDWARE INTRODUCTION ........................................................................................... 9
2.1. Pins Definition ................................................................................................................10
2.2. RS232 Interface ..............................................................................................................12
2.3. RS485 Interface ..............................................................................................................12
2.4. RS422 Interface ..............................................................................................................12
2.5. RJ45 Interface ................................................................................................................13
2.6. Mechanical Size .............................................................................................................13
2.7. Rail Mounting .................................................................................................................14
2.8. Order Information ..........................................................................................................14
3. NETWORK STRUCTURE .................................................................................................. 16
3.1. Wireless Network ...........................................................................................................16
3.1.1. AP Network ..................................................................................................................... 16
3.1.2. STA Wireless Network .................................................................................................... 17
3.1.3. AP+STA Wireless Network ............................................................................................. 18
3.1.4. IOTService Software ....................................................................................................... 20
3.1.5. Webpage Configuration................................................................................................... 21
3.2. Ethernet Interface Function ..........................................................................................22
3.2.1. Ethernet Port with Wi-Fi .................................................................................................. 23
3.2.2. Ethernet Interface Router Function ................................................................................. 23
3.2.3. Ethernet Port Bridge Function ......................................................................................... 24
3.2.4. Cascade Mode ................................................................................................................ 26
4. FUNCTION DESCRIPTION ............................................................................................... 27
APPENDIX A:REFERENCES ..................................................................................................... 28
A.1．Test Tools ..........................................................................................................................28
http://www.hi-flying.com/index.php?route=download/category&path=1_4 .........................28
A.2．Quick Start Manual ...........................................................................................................28
APPENDIX B: CONTACT INFORMATION ............................................................................... 29
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LIST OF FIGURES
Figure 1. HF2221 Appearance ................................................................................................................................. 9
Figure 2. HF2221 Interface ..................................................................................................................................... 10
Figure 3. HF2221 Side View ................................................................................................................................... 10
Figure 4. RS232 Pin Defination(Male/Needle Type) ............................................................................................... 12
Figure 5. HF2221 RS422 Connection ..................................................................................................................... 13
Figure 6. RJ45 Pin Defination ................................................................................................................................. 13
Figure 7. HF2221 Mechanical Dimension ............................................................................................................... 14
Figure 8. HF2221 Rail ............................................................................................................................................ 14
Figure 9. HF2221 Product Order Information ......................................................................................................... 15
Figure 11. HF2221 Function Structure ................................................................................................................... 16
Figure 12. General AP Network .............................................................................................................................. 17
Figure 13. STA Application ..................................................................................................................................... 18
Figure 14. AP+STA Wireless Network .................................................................................................................... 19
Figure 16. Configure Wi-Fi Parameter .................................................................................................................... 20
Figure 17. STA Scan Parameter............................................................................................................................. 21
Figure 18. Configure the Wi-Fi Parameter .............................................................................................................. 21
Figure 19. STA Scan .............................................................................................................................................. 22
Figure 20. Ethernet Interface Function (AP) ........................................................................................................... 23
Figure 21. Ethernet Interface Function 1 (Router) .................................................................................................. 23
Figure 22. Ethernet Interface Function 1 (Router) .................................................................................................. 24
Figure 23. Ethernet Port Function1 (Bridge) ........................................................................................................... 24
Figure 24. Ethernet Port Function2 (Bridge) ........................................................................................................... 25
Figure 24 Cascade Mode ....................................................................................................................................... 26
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LIST OF TABLES
Table 1. HF2221 Technical Specifications ............................................................................................................... 6
Table 2. HF2221 Interface Definition ...................................................................................................................... 11
Table 3. RS232 Interface ........................................................................................................................................ 12
Table 4. RJ45 Interface .......................................................................................................................................... 13
HISTORY
Ed. V1.0 05-11-2017 First Version.
Ed. V1.1 01-16-2018 Modify LED and button description.
Ed. V1.2 02-15-2019 Fix LED description
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1. PRODUCT OVERVIEW
1.1. General Description
The HF2221 provides RS232/RS485/RS422 interface to Ethernet/Wi-Fi connectivity to web enable
any device. The HF2221 integrate TCP/IP controller, memory, 10/100M Ethernet transceiver, highspeed serial port and integrates a fully developed TCP/IP network stack and ECos OS.The HF2221
also includes an embedded web server used to remotely configure, monitor, or troubleshoot the
attached device.
The HF2221 using highly integrated hardware and software platform,It has been optimized for all kinds
of applications in the industrial control, smart grid , personal medical application and remote control
that have lower data rates, and transmit or receive data on an infrequent basis.
The HF2221 integrates all serial to Ethernet functionality with 108 x 146 x 25mm size.
1.2. Device Paremeters
Table 1. HF2221 Technical Specifications
Item
Parameters
System Information
Processor/Frequency
MIPS/320MHz
Flash/SDRAM
4MB/8MB
Operating System
eCos
Ethernet Port
Port Number
2 RJ45
1 WAN/LAN switchable
1 LAN
Interface Standard
10/100 Base-T Auto-Negotiation
Protection
8KV Isolation
Transformer
Integrated
Network Protocol
IP, TCP, UDP, DHCP, DNS, HTTP Server/Client, ARP,
BOOTP, AutoIP, ICMP, Web socket, Telnet, uPNP, NTP,
Modbus TCP
Security Protocol
TLS v1.2
AES 128Bit
DES3
Wi-Fi Interface
Standard
802.11 b/g/n
Frequency
2.412GHz-2.484GHz
Network Mode
STA/AP/STA+AP
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Security
WEP/WPAPSK/WPA2PSK
Encryption
WEP64/WEP128/TKIP/ AES
Tx Power
802.11b: +20dBm(Max.)
802.11g: +18dBm(Max.)
802.11n: +15dBm(Max.)
Rx Sensitive
802.11b: -89dBm
802.11g: -81dBm
802.11n: -71dBm
Antenna
3dBi Stick Antenna
Serial Port
Port Number
2 RS232/RS485/RS422
Interface Standard
RS232: DB9
RS485/RS422: 5.08mm connector
Support one channel of RS232/RS422/RS485.
Data Bits
8
Stop Bit
1,2
Check Bit
None, Even, Odd
Baud Rate
TTL: 2400 bps~230400 bps
Flow Control
No Flow Control
Hardware RTS/CTS、DSR/DTR
Software Xon/ Xoff flow control
Software
Web Pages
Http Web Configuration
Customization of HTTP Web Pages
Configuration
Web
CLI
XML import
Telnet
IOTService PC Software
Firmware Upgrade
Web
Basic Parameter
Size
108 x 146 x 25 mm
Operating Temp.
-25 ~ 85°C
Storage Temp.
-45 ~ 105°C, 5 ~ 95% RH（no condensation）
Input Voltage
5~36VDC
Working Current
~200mA
Power
<700mW
1.3. Key Application
The HF2221 device connects serial device to Ethernet networks using the TCP/IP protocol:
⚫ Remote equipment monitoring
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⚫ Asset tracking and telemetry
⚫ Security Application
⚫ Industrial sensors and controls
⚫ Medical devices
⚫ ATM machines
⚫ Data collection devices
⚫ Universal Power Supply (UPS) management units
⚫ Telecommunications equipment
⚫ Data display devices
⚫ Handheld instruments
⚫ Modems
⚫ Time/attendance clocks and terminals
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2. HARDWARE INTRODUCTION
The HF2221 unit is a complete solution for serial port device connecting to network. This powerful
device supports a 10/100BASE-T Ethernet connection, a reliable and proven operating system stored
in flash memory, an embedded web server, a full TCP/IP protocol stack,and standards-based (AES)
encryption.
Through Ethernet cable connect router with HF2221 serial server for data transfer, which makes the
data transformation very simple. HF2221 meet EMC Class B security level,It can pass every countries
relevant certification test
Figure 1. HF2221 Appearance
HF2221 Serial Server Device User Manual
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2.1. Pins Definition
Figure 2. HF2221 Interface
Figure 3. HF2221 Side View
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Table 2. HF2221 Interface Definition
Function
Name
Description
External
Interface
Ethernet 1
10/100M Ethernet
LAN function
Ethernet 2
10/100M Ethernet
Default is WAN function in AP mode (Can be
configured to LAN Function), connect to router
LAN port for network access.
In STA mode, it works in LAN function.
Wi-Fi Antenna
SMA Antenna Interface
RS232/RS422/
RS485-1
UART1 Channel
RS232/RS422/
RS485-2
UART2 Channel
Earth
Protect Earth
DC Power
Input
DC Power 5~36V
LED
Indicator
Power
Internal Power Supply Indicator
On: Power is OK
Off: Power is NG
LAN(Net-2)
Ethernet 1 Connection Indicator
On: Ethernet connection is OK
Off: No Ethernet connection
Active-1
UART1 channel data transfer Indicator
Flash: Send data
Off: No data sent
Active-2
UART2 channel data transfer Indicator
Flash: Send data.
Off: No data sent
Link(WiFi)
Network Connection Indicator
On: Include the following condition.
⚫ Ethernt 2 connection OK
⚫ Wi-Fi STA connect to AP
⚫ Wi-Fi AP being connected by other STA
device
Off: No network connection
Button
Reload(Reset)
Press down for 4 seconds and then up, the device
will restore to factory setting and reboot.
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2.2. RS232 Interface
Device serial port is male(needle), RS232 voltage level(can connect to PC directly), Pin Order is
cosistent with PC COM port. Use cross Cable connected with PC(2-3 cross, 7-8 cross, 5-5 direct, 7-8
no connection), see the following table for pin defination.
Figure 4. RS232 Pin Defination(Male/Needle Type)
Table 3. RS232 Interface
Pin Number
Name
Description
2
RXD
Receive Data
3
TXD
Send Data
5
GND
GND
7
RTS
Request to Send
8
CTS
Clear to Send
2.3. RS485 Interface
RS485 use two wire links, A(DATA+), B(DATA-). Connect A(+) to A(+), B(-) to B(-) for communication.
The RS485 interface support maximum 32 485 device, special hardware version can support max 255
device. The cable maximum length is 1200 meters. Need to add 120Ohm terminal resistor for over
300 meters.
2.4. RS422 Interface
RS422 interface use T+/T-/R+/R-, cross connect to device as the following picture.
Name
Description
TX+
Transfer Data+
TX-
Transfer Data-
RX+
Receive Data+
RX-
Receive Data-
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Figure 5. HF2221 RS422 Connection
2.5. RJ45 Interface
Ethernet port is 10M/100M adaptive, support AUTO MDI/MDIX which means it support direct
connecting to PC with Ethernet cable.
Figure 6. RJ45 Pin Defination
Table 4. RJ45 Interface
Pin Number
Name
Description
1
TX+
Transfer Data+
2
TX-
Transfer Data-
3
RX+
Receive Data+
4
PHY-VCC
Transformer Tap Voltage
5
PHY-VCC
Transformer Tap Voltage
6
RX-
Receive Data-
7
N.C.
None Connect
8
N.C.
None Connect
2.6. Mechanical Size
The dimensions of HF2221 are defined as following picture (mm):
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Figure 7. HF2221 Mechanical Dimension
2.7. Rail Mounting
We support to provide rail for mounting as the following picture.
Figure 8. HF2221 Rail
2.8. Order Information
HF2221 is defined as following.
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Figure 9. HF2221 Product Order Information
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3. NETWORK STRUCTURE
3.1. Wireless Network
HF2221 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. It can provide flexible networking method and network topology. Functions is as follow:
Figure 11. HF2221 Function Structure
<Introductions>
AP: Wireless access point which is the central joint. Usually, wireless router is AP, other STA devices
can connect with AP to join the network.
STA: Wireless station which is terminal of a wireless network. Such as laptop and pad etc.
3.1.1. AP Network
HF2221 can construct a wireless network as AP. All the STA devices will consider the AP as the
centre of the wireless network. The mutual communication can be transponded by AP shown as follow:
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Figure 12. General AP Network
3.1.2. STA Wireless Network
Take the following picture as example. When router works in AP mode, HF2221 connects to the user’s
devices by RS232/RS485 interface. In this topology, the whole wireless network can be easily
stretched.
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r
Figure 13. STA Application
3.1.3. AP+STA Wireless Network
HF2221 can support AP+STA method. It can support AP and STA interface at the same time shown
as follow:
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Figure 14. AP+STA Wireless Network
In this picture, HF2221 open the AP+STA function and the STA interface can be connected to the
remote server by the router. Similarly, the AP interface can also be used. Phone/PAD can be
connected to the AP interface and to control the serial devices or set itself.
Through AP+STA function, it is convenient to use Phone/PAD to monitor the user’s devices and not
change its original settings.
Through AP+STA function, it is convenient to configure the product. and it solves the problem that the
formal product can only configure by serial port.
Notes that:
When the AP+STA function is opened, the STA interface needs to connect to router. Otherwise,
STA interface will endlessly scan the router information nearby. When it is scanning, it will
bring bad effects to the AP interface, like losing data etc.
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Note:
AP and STA parts must set to the different sub-network.
3.1.4. IOTService Software
Open the IOTService after connect to the AP hotspot generated by HF2221 or PC and HF2221
connect to same router (WAN port connect to router LAN port). Then configure the parameter.
Figure 16. Configure Wi-Fi Parameter
HF2221 Serial Server Device User Manual
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Figure 17. STA Scan Parameter
3.1.5. Webpage Configuration
Use PC to connect with HF2221 through its AP SSID (IP:10.10.100.254) or PC and HF2221 connect
to same router (WAN port connect to router LANN port, IP is assigned by router). Type the product IP,
default username and password: admin/admin) to login the webpage to configure the parameter.
Figure 18. Configure the Wi-Fi Parameter
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Figure 19. STA Scan
3.2. Ethernet Interface Function
HF2221 provides with a 100M Ethernet interface. Through the 100M Ethernet interface, user can
achieve the connection among WIFI, serial port and Ethernet port.
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3.2.1. Ethernet Port with Wi-Fi
Figure 20. Ethernet Interface Function (AP)
HF2221 servers as AP and generate a central network. The IP addresses of all the devices and
modules are in the same network segment.
3.2.2. Ethernet Interface Router Function
Figure 21. Ethernet Interface Function 1 (Router)
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The HF2221 device Ethernet interface work in router mode. When connect to router, it will get IP
address from router (as picture 192.168.1.100). The product itself generate a subnet (10.10.100.254
default). The device from the Ethernet interface is assigned with IP address by module
(10.10.100.101). The device and the PC1 are in the same subnet for network communication. A
connection fro PC1 to PC2, but PC2 cannot actively connect to PC1.
Figure 22. Ethernet Interface Function 1 (Router)
The HF2221 device Ethernet interface work in router mode. Default Ethernet 2 is WAN which is used
to IP addres s(as figure 192.168.1.100 ). Default Ethernet 1 is LAN, and the device itself constitute a
subnet (10.10.100.254 default). The device IP is assigned by module(as figure 192.168.1.100).
3.2.3. Ethernet Port Bridge Function
Figure 23. Ethernet Port Function1 (Bridge)
The HF2221 device Ethernet interface work in bridge mode. When connect to router, it will get IP
address from router (as picture 192.168.1.101). AT the whole network, the product is like an invisible
device. PC1 ad PC2 can communicated mutually without any constraint. But if product needs to
connect with other devices, it needs set LAN IP address (192.168.1.10 as picture)
HF2221 Serial Server Device User Manual
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Figure 24. Ethernet Port Function2 (Bridge)
The HF2221 device Ethernet interface work in bridge mode. Default Ethernet 2 is WAN for connecting
to the router while the Ethernet 1 is LAN to connect to the PC. PC acquire the IP address
(192.168.1.101 as figure). In the whole network, device is like a transparent. PC1 and PC2 can
connect each other without any constraint. But iif need to connect other device, it will set as LAN IP
address (192.168.1.10 as figure).
Notes:
Webpage, IOTService, or Cli command to set working mode, by default is router mode.
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3.2.4. Cascade Mode
Figure 24 Cascade Mode
Devices can work as cascade to add connection nodes. Multiple HF2221 LAN and gateway address is
not constraint each other (LAN1: 192.168.2.1, LAN2: 192.168.3.1 as figure). By ethernet connection,
modules can acquire upper router IP address to become cascade mode.
HF2221 Serial Server Device User Manual
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4. FUNCTION DESCRIPTION
Refer to “IOT_Device_Series_Software_Funtion” document for more detailed function.
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APPENDIX A:REFERENCES
A.1．Test Tools
IOTService Configure Software:
http://www.hi-flying.com/download-center-1/applications-1/download-item-iotservice
UART、Network Test software:
http://www.hi-flying.com/index.php?route=download/category&path=1_4
A.2．Quick Start Manual
See our product application on website:
http://www.hi-flying.com/network-device/hf2221
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APPENDIX B: CONTACT INFORMATION
-----------------------------------------------------------------------------------------------------------Address: Room 1002,Building 1,No.3000,Longdong Avenue,Pudong New
Area,Shanghai,China,201203
Web: www.iotworkshop.com or www.hi-flying.com
Contact:
Sales: sales@iotworkshop.com
Support: support@iotworkshop.com
Service: service@iotworkshop.com
Business: business@iotworkshop.com
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For more information about IOTworkshop modules, applications, and solutions, please visit our web
site www.iotworkshop.com
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