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WB2S Datasheet 

1 Product Overview 

WB2S is a low-power embedded Wi-Fi module that Tuya has developed. It consists of a 

highly integrated RF chip (BK7231D) and several peripheral components, with an 

embedded Wi-Fi network protocol stack and robust library functions. WB2S also 

contains a low-power Arm Cortex-M4 microcontroller unit (MCU), 1T1R WLAN module, 

256 KB static random-access memory (SRAM), 2 MB flash memory, and extensive 

peripherals. 

WB2S is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and 

TCP/IP protocols. You can develop embedded Wi-Fi products as required. 

1.1 Features 

  Embedded low-power 32-bit CPU, which can also function as an application 

processor 

  Clock rate: 120 MHz 

  Working voltage: 3.0 V to 3.6 V 

  Peripherals: five GPIOs, one universal asynchronous receiver/transmitter (UART), 

and one analog-to-digital converter (ADC) 

  Wi-Fi connectivity 

  802.11b/g/n20/n40   

  Channels 1 to 14 at 2.4 GHz 

  WPA and WPA2 security modes 

  Up to +16 dBm output power in 802.11b mode 

  EZ net pairing mode for Android and iOS devices 

  Onboard PCB antenna 

Tuya WB2S Wi-Fi Module 

Version: 1.0.0 

Date: 2019-11-23 

No.: 0000000001 

Product 
Manual 

Global Intelligent Platform 

Содержание WB2S

Страница 1: ...nction libraries of the Wi Fi MAC and TCP IP protocols You can develop embedded Wi Fi products as required 1 1 Features Embedded low power 32 bit CPU which can also function as an application processo...

Страница 2: ...Bm EIRP Onboard PCB antenna with a gain of 1 dBi 1 2 Application Scenarios Intelligent building Smart household and home appliances Healthcare Industrial wireless control Baby monitor Network camera I...

Страница 3: ...tion 9 3 4 RX Current Consumption 9 3 5 Working Current 9 4 RF Features 10 4 1 Basic RF Features 10 4 2 WB2S TX Power 11 4 3 WB2S RX Sensitivity 11 5 Antenna Information 12 5 1 Antenna Type 12 5 2 Ant...

Страница 4: ...WB2S Datasheet 4 7 Reference Circuit 18 7 1 Schematic Diagram 18 8 MOQ and Packing Information 19...

Страница 5: ...ven temperature curve 16 Figure 7 1 WB2S schematic diagram 18 Tables Table 2 1 WB2S interface pins 6 Table 3 1 Absolute electrical parameters 7 Table 3 2 Normal working conditions 8 Table 3 3 Current...

Страница 6: ...sional tolerance is 0 35 mm and the tolerance for some measurements is 0 1 mm The PCB thickness is 1 0 0 1 mm 2 2 Interface Pin Definition Table 2 1 WB2S interface pins Pin No Symbol I O Type Function...

Страница 7: ...the internal IC 9 PWM4 I O Common GPIO which is connected to the P24 pin on the internal IC 10 CEN I O External enabled reset pin which is active at a low level and is connected to the CEN pin on the...

Страница 8: ...Normal working conditions Parameter Description Minimum Value Typical Value Maximum Value Unit Ta Working temperature 20 N A 85 C VCC Power supply voltage 3 0 3 3 3 6 V VIL I O low level input 0 3 N...

Страница 9: ...m 200 mA IRF 12 dBm 185 mA IRF 802 11n BW40 MCS7 12 dBm 190 mA IRF 11 dBm 190 mA 3 4 RX Current Consumption Table 3 4 Current consumption during constant receiving Symbol Mode Typical Value Unit IRF C...

Страница 10: ...i indicator is steady off 60 110 mA 4 RF Features 4 1 Basic RF Features Table 4 1 Basic RF features Parameter Description Frequency band BT 2 400 GHz to 2 4835 GHz WIFI 2 412 GHz to 2 484 GHz Wi Fi st...

Страница 11: ...dBm Average RF output power 802 11n OFDM mode MCS7 N A 12 N A dBm Frequency error 2 N A 2 ppm EVM under 802 11b CCK 11 Mbit s 16 dBm 23 dB EVM under 802 11g OFDM 54 Mbit s 14 0 dBm 27 dB EVM under 802...

Страница 12: ...enna it is recommended that the antenna be at least 15 mm away from other metal parts To prevent adverse impact on the antenna radiation performance avoid copper or traces along the antenna area on th...

Страница 13: ...onal tolerance is 0 35 mm If a customer has other requirements clearly specify them in the datasheet after communication 5 3 Antenna Connector Specifications WB2S does not use an antenna connector 6 P...

Страница 14: ...2S pins Figure 6 3 Top and bottom views of the PCB to which WB2S applies 6 3 Production Instructions 1 Use an SMT placement machine to mount the stamp hole module that Tuya produces onto the PCB withi...

Страница 15: ...a dry packaged product is 12 months from the date when the product is packaged and sealed 3 The package contains a humidity indicator card HIC Figure 6 4 HIC for WB2S 3 Bake a module based on HIC stat...

Страница 16: ...ya is not liable for such problems and consequences 6 Before SMT placement take electrostatic discharge ESD protective measures 7 To reduce the reflow defect rate draw 10 of the products for visual in...

Страница 17: ...WB2S Datasheet 17 6 5 Storage Conditions...

Страница 18: ...WB2S Datasheet 18 7 Reference Circuit 7 1 Schematic Diagram Figure 7 1 WB2S schematic diagram...

Страница 19: ...Packing Information Table 8 1 Packing information MOQ and packing information Product Model MOQ Packing Method Number of Modules in Each Reel Pack Number of Reel Packs in Each Box WB2S 4000 Carrier t...

Страница 20: ...ent does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or mor...

Страница 21: ...ed between the antenna and users and 2 The transmitter module may not be co located with any other transmitter or antenna As long as 2 conditions above are met further transmitter test will not be req...

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