WBR1D Module

WBR1D 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 WBR1D module during MCU connection development.

WBR1D 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 RTL8720DN and a few peripheral components, with a built-in Wi-Fi network protocol stack and various library functions. WBR1D also has a low power 32-bit CPU, 512 KB static random access memory (SRAM), 4MB external flash, and rich peripheral resources.

As a real time operating system (RTOS) platform, WBR1D 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 WBR1D 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 392 mA. It is recommended that the supply current of the 3.3 V module should exceed 450 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:

  • RST pin only resets the module hardware, but cannot clear Wi-Fi network configuration information. For more information, see WBR1D Module Datasheet.

• Radio frequency (RF) of the module:

  • The module has a PCB onboard antenna.

  • 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. Wiring and copper pour are not allowed in the antenna area of the PCB, in order not to affect the antenna performance. Layout: make sure that no substrate medium exists directly below or above the printed antenna, and the printed antenna is away from the copper sheet. In this way, the antenna radiation effect is guaranteed to the maximum extent.