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1 Quick Start.................................................................................................................................................. 7
1.1 Hardware connect.......................................................................................................................... 7
1.2 Network connection........................................................................................................................7
1.3 communication test........................................................................................................................ 9
2 Product Overview...................................................................................................................................... 9
2.1 General Description..................................................................................................................... 10
2.2 Device Features........................................................................................................................... 10
2.3 Device Paremeters.......................................................................................................................11
2.4 Key Application............................................................................................................................. 11
2.5 Package Information....................................................................................................................12
2.5.1 Recommended Reflow Profile........................................................................................ 12
2.5.2 Device Handling Instruction (Module IC SMT Preparation)........................................12
2.5.3 Shipping Information.........................................................................................................13
3 Hardware Introduction............................................................................................................................ 13
3.1 Pins Definition...............................................................................................................................13
3.1.1 USR-WIFI232-A/B Pins Definition.................................................................................. 13
3.1.2 USR-WIFI232-Ca/Cb Pins Definition............................................................................. 15
3.2 Mechanical Size........................................................................................................................... 16
3.2.1 USR-WIFI232-A/B.............................................................................................................16
3.2.2 USR-WIFI232-Ca/Cb........................................................................................................17
3.3 Antenna..........................................................................................................................................18
3.3.1 On-board Chip Antenna................................................................................................... 18
3.3.2 External Antenna...............................................................................................................18
3.4 Evaluation Kit................................................................................................................................ 19
3.5 Hardware Reference Design...................................................................................................... 21
3.5.1 Hardware Typical Application.......................................................................................... 21
3.5.2 10/100M Ethernet Interface.............................................................................................22
3.5.2.1 Ethernet Connection with Transformer...............................................................22
3.5.2.2 Ethernet Connection without Transformer......................................................... 23
3.5.3 UART Interface..................................................................................................................25
3.5.4 Power Interface................................................................................................................. 25
4 Modules Function Description............................................................................................................... 25
4.1 User configuration process......................................................................................................... 26
4.2 Working mode...............................................................................................................................26
4.2.1 Transparent Mode.............................................................................................................26
4.2.2 Serial command mode..................................................................................................... 27
4.2.3 GPIO mode........................................................................................................................ 28
4.2.4 HTTPD Client mode......................................................................................................... 28
4.3 Wireless Networking.................................................................................................................... 29
4.3.1 STA......................................................................................................................................30
4.3.2 AP........................................................................................................................................ 30
4.3.3 AP+STA.............................................................................................................................. 31
4.4 Ethernet Interface Communication............................................................................................ 32
Jinan USR IOT Technology Limited
USR-WIFI232-A/B/C User Manual
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