WBR1 Module

WBR1 is a low power embedded Wi-Fi and Bluetooth LE combo module developed by Tuya Smart.

Scope of application

This topic describes relevant information about WBR1 module during MCU connection development.

WBR1 is a low power embedded Wi-Fi and Bluetooth LE combo module developed by Tuya Smart. The module consists of a highly integrated radio-frequency identification (RFID) chip RTL8720CF, with a built-in Wi-Fi network protocol stack and various library functions. WBR1 also has low-power KM4 MCU, WLAN MAC, and 1T1R WLAN. The highest basic frequency is 100 MHz. The module has 256 KB built-in static random access memory (SRAM), 2 MB flash, and numerous peripheral resources. As a real time operating system (RTOS) platform, WBR1 integrates all function libraries of Wi-Fi MAC and TCP/IP protocols. You can develop your own embedded Wi-Fi products.

For more information, see WBR1 Module Datasheet.

Typical application diagram

• Reference diagram of coordinated processing mode of the module and 3.3 V MCU:

  

• Reference diagram of coordinated processing mode of the module and 5 V MCU:

  

Design specification

• Module power supply:

  • When the module is in the working mode, the maximum transient current reaches 324 mA. It is recommended that the supply current of the 3.3 V module should exceed 400 mA.
  • In the PCB layout, capacitors C1 and C2 at the power input pin shall be arranged near the power supply pin. The capacitance shall exceed 10 uF.

• Module pin:

  • There are no special pins. For more information, see WBR1 Module Datasheet.

• Radio frequency (RF) of the module:

  • The module supports two types of antennas, PCB onboard antenna and external antenna. By default, PCB onboard antenna is used. The PCB onboard antenna or external antenna can be selected by configuring the resistor.

  • When a PCB onboard antenna is used in the Wi-Fi module, it is recommended that the distance between the module antenna and other metal parts should be at least 15 mm, in order to optimize the Wi-Fi performance.

  • The parameters of the antenna connector are shown in the figure below: