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Wi-Fi & Bluetooth LE MCU Board (WBR3)

Last Updated on : 2022-10-26 07:00:02download

The Tuya Sandwich Wi-Fi and Bluetooth LE combo wireless communication board has a WBR3 chip as a microcontroller, which is designed to help you easily prototype your IoT ideas. It can work with functional boards or circuit boards to implement specific features.

Wi-Fi & Bluetooth LE MCU Board (WBR3)

Applications

  • This board applies to a wide range of prototypes implemented with Tuya’s custom solutions, such as lights, dimmers, remote controls for lights, power strips, switches, home appliances, sensors, and much more.
  • Develop with the board to build your IoT projects easily and fast.
  • You can use this board for different development purposes.
    • Embedded program development and debugging
    • App development and debugging
    • Creating connected devices that can be controlled with a mobile phone
    • Getting started with IoT development and learning how the Wi-Fi-based control system works

Components

The development board is integrated with Tuya’s proprietary high-performance Wi-Fi and Bluetooth LE combo module WBR3. It has on-board buttons, LED, and more. For more information, see the WBR3 Module Datasheet.

I/O port and pin description

Wi-Fi & Bluetooth LE MCU Board (WBR3)

  • 1: LED indicator (LED1): When GPIOA_2 outputs high, the LED is on.

  • 2: LED indicator (LED2): When the 3.3V power is on, the LED is on.

  • 3: Button (SW1): Module’s enable pin that is active low. When the button is pressed, the pin outputs low.

  • Pin description

    No. Symbol Description
    1 NC Leave it floating.
    2 NC Leave it floating.
    3 NC Leave it floating.
    4 3V3 3.3V power pin.
    5 NC Leave it floating.
    6 GND Ground pin.
    7 GND Ground pin.
    8 NC Leave it floating.
    9 NC Leave it floating.
    10 NC Leave it floating.
    11 NC Leave it floating.
    12 NC Leave it floating.
    13 NC Leave it floating.
    14 NC Leave it floating.
    15 TXD GPIOA_14, which can be reused as the UART0_TXD pin for serial communication.
    16 RXD GPIOA_13, which can be reused as the UART0_RXD pin for serial communication.
    17 NC Leave it floating.
    18 NC Leave it floating.
    19 NC Leave it floating.
    20 NC Leave it floating.
    21 NC Leave it floating.
    22 NC Leave it floating.
    23 NC Leave it floating.
    24 NC Leave it floating.
    25 NC Leave it floating.
    26 NC Leave it floating.
    27 NC Leave it floating.
    28 NC Leave it floating.
    29 GND Ground pin.
    30 NC Leave it floating.
    31 NC Leave it floating.
    32 NC Leave it floating.
  • The reserved pin
    You can use the reserved pin for license activation, firmware updates, or log printing.

    No. Symbol Description
    1 RXD GPIOA_13, which can be reused as the UART0_RXD pin to activate the license.
    2 TXD GPIOA_14, which can be reused as the UART0_TXD pin to activate the license.
    3 GND Ground pin.
    4 3.3V 3.3V power pin.
    5 LOG The pin for log printing.
    6 RST Module’s enable pin that is active low.

Power requirements

  • Power is input through the 3.3V pin. The operating voltage is from 3.0V to 3.6V.

  • Consumption

    Mode Status (Ta = 25°C) Average Peak Unit
    Pairing in EZ mode The module is being paired in EZ mode. 75 324 mA
    Idle mode The module is connected to the internet. 64 314 mA
    Working mode The module is connected to the internet. 66 305 mA
    Disconnected mode The module is disconnected from the internet. 66 309 mA

Schematic diagram and PCB

  • The schematic diagram of the board:

    Wi-Fi & Bluetooth LE MCU Board (WBR3)

  • The PCB board:

    Wi-Fi & Bluetooth LE MCU Board (WBR3)

Connection for flashing

For flashing license and firmware, connect pins following the table and figure shown below.

Communication board Reserved pins Pins on USB-to-serial chip Connector
Wi-Fi & Bluetooth LE Communication Board (WBR3) 3.3V 3.3V Jumper wires
TXD USB-RX
RXD USB-TX1
GND GND

Connection for viewing logs

For flashing license and firmware, connect pins following the table and figure shown below.

Communication board Reserved pins Pins on USB-to-serial chip Connector
Wi-Fi & Bluetooth LE Communication Board (WBR3) LOG USB-RX Jumper wires
GND GND

Things to note

  • This board does not have a built-in power supply, so an additional power board is necessary.
  • This board only supports 3.3V input voltage with a supply current of at least 350 mA.