Tuya Sandwich Wi-Fi SOC Board (WB3S)

The Tuya Sandwich Wi-Fi SoC master control board (WB3S) helps you quickly implement various smart hardware prototypes. You can use the Tuya Sandwich Wi-Fi SoC master control board (WB3S) with other functional circuit modules or circuit boards to implement corresponding functions.

Scenarios

• The Tuya Sandwich Wi-Fi SoC master control board (WB3S) applies to many prototypes developed by Tuya IoT custom solutions, including sockets, power strips, switches, and light products.

• You also can implement diversified smart hardware demos with this development board.

• The common scenarios of the Tuya Sandwich Wi-Fi SoC master control board are as follows:

  • Embedded systems engineers can use the board to perform preliminary embedded programming and debugging.
  • App developers can use the board to develop and debug apps.
  • Makers can use the board to quickly implement hardware demos and device control with the mobile phone.
  • IoT technology enthusiasts can use the board to learn about the Wi-Fi control principle and smart device development.

Introduction to key components

The Tuya Sandwich Wi-Fi SoC master control board (WB3S) adopts the high-performance Wi-Fi module WB3S developed by Tuya Smart. The development board contains Wi-Fi module WB3S, buttons, LED indicators, user-defined I/O interfaces, power supply, and more. For more information, see WB3S Module Datasheet.

I/O ports and function definitions

• CN5 serial port for UART upgrade: Used for system upgrade and debugging.

• LED indicator LED2: 3.3V power indicator.

• LED indicator LED1: You can customize functions.

• Button SW1: You can customize functions. It is detected by P14. Its logic level is high when initialized and is low when pressed.

• Other GPIO ports: You can customize functions.

  No.	Symbol	Description
  1	CEN	The hardware reset pin, which is active low.
  2	3V3	3.3V power input pin.
  4	GND	Power ground.
  5	ADC	ADC input pin.
  6	TXD2	Log port TXD2.
  7	RXD2	Log port RXD2.
  8	RXD	User serial port RXD.
  9	TXD	User serial port TXD.
  10	PWM0	GPIOP_6, which is corresponding to IC-P6. It can be configured as PWM output or IIC_SCL.
  11	PWM1	GPIOP_7, which is corresponding to IC-P7. It can be configured as PWM output or IIC_SCL.
  12	PWM2	GPIOP_8, which is corresponding to IC-P8. It can be configured as PWM output.
  13	PWM3	GPIOP_9, which is corresponding to IC-P9. It can be configured as PWM output.
  14	PWM4	GPIOP_24, which is corresponding to IC-P24. It can be configured as PWM output.

Schematic diagram and PCB

• Schematic diagram of Tuya Sandwich Wi-Fi SoC master control board (WB3S):

  

• PCB of Tuya Sandwich Wi-Fi SoC master control board (WB3S):

  

Things to note

• The development board in this solution must be used with a power board.
• The development board in this solution only supports 3.3V power input, and the supply current is not less than 400mA.