High Flying Electronics Technology HF A21 User Manual
HF-A21 Embedded WiFi Module User Manual
1
HF-A21
Embedded WiFi Module User Manual
V1.0
Overview of Characteristic
Support IEEE802.11b/g/n Wireless Standards
Support TCP/UDP/HTTP Network Protocols
Support UART/Ethernet Data Interface
Support Work As STA/AP/AP+STA Mode
Support Router/Bridge Mode Networking
Support Internal/External Antenna Option
Support AT+ Instruction Set for Configuration
Support Friendly Web Configuration Page
Support Heatbeat Signal
Support Smart Link Application Tools
Support UART Free/Auto-Frame Function
Single +3.3V Power Supply
Small Size: 25 x 40mm
FCC/CE Certificated
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
HF-A21 Embedded WiFi Module User Manual
2
TABLE OF CONTENTS
1. PRODUCT OVERVIEW ............................................................................................................... 6
1.1. General Specification ............................................................................................................. 6
1.2. Hardware Introduction ............................................................................................................ 7
1.2.1. Pins Definition .................................................................................................................... 7
1.2.2. Mechanical Size ................................................................................................................. 9
1.2.3. On-board Chip Antenna ..................................................................................................... 9
1.2.4. External Antenna ............................................................................................................. 10
1.2.5. Evaluation Kit ................................................................................................................... 10
1.2.6. Order Information ............................................................................................................. 12
1.3. Hardware Reference Design ................................................................................................ 12
1.3.1. Hardware Typical Application .......................................................................................... 12
1.4. Typical Application ............................................................................................................... 13
2. PACKAGE INFORMATION ....................................................................................................... 14
5.1 Shipping Information ............................................................................................................ 14
APPENDIX A: EVB REFERENCE DESIGN ................................................................................... 15
APPENDIX B: CONTACT INFORMATION ..................................................................................... 16
Shanghai High-Flying Electronics Technology Co., Ltd
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HF-A21 Embedded WiFi Module User Manual
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LIST OF FIGURES
Figure 1. HF-A21 Appearance .............................................................................................................. 7
Figure 2. HF-A21 Pins Map .................................................................................................................. 7
Figure 3. HF-A21 Mechanical Dimension ............................................................................................. 9
Figure 4. HF-A11 Chip Antenna Keep Out Region............................................................................... 9
Figure 5. Suggested Module Placement Region ................................................................................ 10
Figure 6. HF-A21 Evaluation Kit ......................................................................................................... 11
Figure 7. HF-A21 Order Information ................................................................................................... 12
Figure 8. HF-A11 Hardware Typical Application ................................................................................ 12
Figure 9. Shipping Information ............................................................................................................ 14
LIST OF TABLES
Table 1 HF-A21 Module Technical Specifications............................................................................... 6
Table 2 HF-A21 Pins Definition ........................................................................................................... 7
Table 3 HF-A11 External Antenna Parameters ................................................................................. 10
Table 4 HF-A21 Evaluation Kit Interface Description ........................................................................ 11
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
HF-A21 Embedded WiFi Module User Manual
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HISTORY
Ed. V1.0 Created on 5-09-2016.
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
HF-A21 Embedded WiFi Module User Manual
5
Class
Item
Parameters
Wireless
Parameters
Certification
FCC/CE
Wireless standard
802.11 b/g/n
Frequency range
Transmit Power
802.11b: +20 dBm (Max.)
802.11g: +18 dBm (Max.)
802.11n: +15 dBm (Max.)
802.11b: -89 dBm
802.11g: -81dBm
802.11n: -71dBm
External:I-PEX Connector
Internal:On-board PCB antenna
Hardware
Parameters
Data Interface
UART: 1200bps - 230400bps
Ethernet: 10Mbps/100Mpbs
GPIO,I2C
Operating Voltage
3.3V (+/-5%)
Operating Current
Avg:170mA Peak:400mA
Operating Temperature
-40℃- 85℃
Storage Temperature
-45℃- 125℃
Dimensions and Size
25×40×8mm
Software
Parameters
Network Type
STA /AP/AP+STA mode
Security Mechanisms
WEP/WPA-PSK/WPA2-PSK/WAPI
Encryption
WEP64/WEP128/TKIP/AES
Work Mode
Transparent Transmission
Serial command
AT+instruction set
Network Protocol
TCP/UDP/ARP/ICMP/DHCP/DNS/HTTP
Max. TCP Connection
32
User Configuration
Web Server＋AT command config.
User Application SW
Support customized application SW
Provide SDK package
Provide smart link tools
1. PRODUCT OVERVIEW
1.1. General Specification
Table 1 HF-A21 Module Technical Specifications
2.412GHz-2.462GHz
Receiver Sensitivity
Antenna Option
Shanghai High-Flying Electronics Technology Co., Ltd
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HF-A21 Embedded WiFi Module User Manual
6
Pin
Description
Name
Direction
Note
1
Ground
GND
Power
2
VCC
3.3V
Power
3.3V @ 350mA power input
3
UART Data Transmit
UART_TXD
NOTE1
O
GPIO
GPIO12
I/O
4
UART Data Receive
UART_RXD
NOTE2
I GPIO
GPIO13
I/O
5
GPIO
GPIO4
I/O
6
GPIO
GPIO5
I/O
7
Module reset signal
RESET
I
“Low ( 0 )” effective reset input.
The reset duration should be
kept more than 300ms
8
WiFi status Indication
nLink
O
“1”- WIFI connection available,
“0”- No WIFI connection
Can be configured as GPIO.
GPIO
GPIO0
I/O
1.2. Hardware Introduction
Figure 1. HF-A21 Appearance
1.2.1. Pins Definition
Figure 2. HF-A21 Pins Map
Table 2 HF-A21 Pins Definition
Shanghai High-Flying Electronics Technology Co., Ltd
www.hi-flying.com
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