Tuya Sandwich Wi-Fi MCU Board (E3S)

The Tuya Sandwich Wi-Fi MCU communication board (E3S) helps you quickly implement various smart hardware prototypes. You can use the Tuya Sandwich Wi-Fi MCU communication board (E3S) with other functional circuit modules or circuit boards to implement corresponding functions.

Scenarios

• The Tuya Sandwich Wi-Fi MCU communication board (E3S) applies to many product prototypes developed by Tuya IoT custom solutions, including lighting, desk lamps, filament lamps, dimmers, lighting remote controls, power strips, switches, home appliances, exercise and health, and sensors.

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

• The common scenarios of the Tuya Sandwich Wi-Fi MCU communication 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 a 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 MCU communication board (E3S) adopts the high-performance Wi-Fi module TYWE3S developed by Tuya Smart. The development board contains Wi-Fi module TYWE3S, buttons, LED indicators, UART ports, power supply, and more. For more information, see TYWE3S Module Datasheet.

I/O ports and function definitions

• CN13 serial port for UART upgrade: Mainly used for system upgrade and debugging.

• LED indicator LED1: You can customize its functions. The indicator is controlled by I/O14 and is active high.

• Button SW1: You can customize its functions. The button is detected by I/O0. Its logic level is high when initialized and is low when pressed.

• Other GPIO ports: Serial ports and power ports. See the following table.

  No.	Symbol	Description
  1	3.3V	3.3V power input pin
  2	GND	Power ground
  3	IO1/TX	UART0, user serial port
  4	IO3/RX	UART0, user serial port

Schematic diagram and PCB

• Schematic diagram of Tuya Sandwich Wi-Fi MCU communication board (E3S):

  

• PCB of Tuya Sandwich Wi-Fi MCU communication board (E3S):

  

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 350 mA.

Reference

• Demos

• Overview of the Tuya Sandwich Evaluation Kit