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                          USR-WIFI232-B2 Hardware Manual                                                 

www.usriot.com

 

 

 
Jinan USR IOT Technology Limited                                                    9 / 9                                                                     

 

h.usriot.com

 

Frequency   

2.4~2.5GHz 

Impedance 

50 Ohm 

VSWR 

2 (Max) 

Return Loss 

-10dB (Max) 

Connector 

I-PEX or populate directly 

 

 

 

 

 

3. Contact 

Company: Jinan USR IOT Technology Limited 

Address:   Floor  11,  Building  No.1,  No.1166,  Xinluo  Street,  Gaoxin  District,  Jinan  city,  Shandong  province, 

250101 China 

Tel: 86-531-88826739 

Web: 

www.usriot.com

 

 

Support: 

h.usriot.com

   

 

Email: 

[email protected]

 

 

4. Disclaimer 

This document provide the information of USR-WIFI232-B2 

products, it hasn’t been granted any intellectual 

property license by forbidding speak or other ways either explicitly or implicitly. Except the duty declared in 
sales terms and conditions, we don’t take any other responsibilities. We don’t warrant the products sales and 
use explicitly or implicitly, including particular purpose merchantability and marketability, the tort liability of any 

other patent right, copyright, intellectual property right. We may modify specification and description at any 

time without prior notice.     

5. Update History   

2017-07-27    V1.0.0 created.   

Summary of Contents for USR-WIFI232-B2

Page 1: ...USR WIFI232 B2 Hardware Manual www usriot com Jinan USR IOT Technology Limited 1 9 h usriot com USR WIFI232 B2 Hardware Manual File version 1 0 0 ...

Page 2: ...w 3 1 1 Dimension 3 1 2 Encapsulation 3 1 3 Pin Defination 4 2 Hardware Design 5 2 1 Typical Connection 5 2 2 Power Interface 5 2 3 UART Interface 5 2 4 10 100M Ethernet Interface 6 2 4 1 Ethernet Interface with Transformer 6 2 4 2 Ethernet Interface without Transformer 7 2 5 Reset and Reload 8 2 6 Antenna 8 3 Contact 9 4 Disclaimer 9 5 Update History 9 ...

Page 3: ...t com Jinan USR IOT Technology Limited 3 9 h usriot com 1 Product Overview 1 1 Dimension Module dimension diagram as follows 1 2 Encapsulation You can download PCB library from http www usriot com pcb library usr wifi232 a2b2 pcb library file ...

Page 4: ... 4 UART_RXD I GPIO4 I O 5 UART_RTS O GPIO5 I O 6 UART_CTS I GPIO6 I O 7 RESET I Take effect in low level 8 nLink O Output high level WIFI connection available Output low level WIFI connection not available Can be configured as GPIO GPIO8 I O 9 nReady O After module starting output high level or heartbeat signal Can be configured as GPIO GPIO9 I O 10 nReload I Take effect in low level Press over 3s...

Page 5: ...sleep mode current is 100mA The power filter is recommended to be used near the connector of the user board and it is recommended to use two parallel decoupling capacitors with 100uF and 10uF to improve the stability of the system and wireless performance 2 3 UART Interface UART is serial data interface that can connect the RS 232 chip and transfer to the RS 232 level UART interface includes TXD R...

Page 6: ...of MCU and RXD of module to TXD of MCU When communicate to MCU with 5V switching circuit is necessary Switching circuit diagram as follows 2 4 10 100M Ethernet Interface 2 4 1 Ethernet Interface with Transformer Put the Ethernet transformer and RJ45 connector on the circuit board can get the standard 10 100M Ethernet interface The reference circuit diagram as follows ...

Page 7: ... can t be saved Circuit diagram as follows Note VCC signal at reference design shall base on user board PHY chipset voltage level such as 2 5V power supply for general Ethernet PHY chipset USR WIFI232 B2 Ethernet interface default is for the application with transformer connection If user need PHY PHY directly connection please refer to above diagram and use follows AT commands AT VEW enable CR to...

Page 8: ...port direct cross self adaption 3 PHY chip on board should better to be forced into 100M work mode 2 5 Reset and Reload nReload nReload pin can connect to external button or configuration pin Press button over 3s to restore factory settings nReload pin should connect to external 4 7k 10k Ohm pull up resistor Circuit diagram as follows nReset Reseting the module and taking effect in low level nRese...

Page 9: ...usr cn 4 Disclaimer This document provide the information of USR WIFI232 B2 products it hasn t been granted any intellectual property license by forbidding speak or other ways either explicitly or implicitly Except the duty declared in sales terms and conditions we don t take any other responsibilities We don t warrant the products sales and use explicitly or implicitly including particular purpos...

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