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Tuya Sandwich Wi-Fi SoC Board (E3S)

Last Updated on : 2022-10-26 06:59:32download

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

Scenarios

The Tuya Sandwich Wi-Fi SoC master control board (E3S) applies to many prototypes developed by Tuya IoT plug and play solutions, including sockets, power strips, and switches.
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 (E3S) 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 (E3S) adopts the high-performance Wi-Fi module TYWE3S developed by Tuya Smart. The development board contains Wi-Fi module TYWE3S, buttons, LED indicators, user-defined I/O interfaces, 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: You can customize their functions. See the following table.

No.	Symbol	Description
1	RST	I/O. The hardware reset pin, which is active low.
2	3.3V	3.3V power input pin.
3	5V	NC.
4	GND	Power ground.
5	VIN	NC.
6	ADC	10-bit SAR ADC.
7	IO4	GPIO. It can be configured as PWM output or IIC_SDA.
8	IO5	GPIO. It can be configured as PWM output or IIC_SCL.
9	IO3/RX	UART0, user serial port.
10	IO1/TX	UART0, user serial port.
11	IO16	GPIO, pulled up.
12	IO2	O, UART0_TXD, used to print the internal information of the module.
13	IO14	GPIO. It can be configured as PWM output to serve as the indicator control pin and is pulled down.
14	IO0	GPIO. It is pulled up and used in the process of module power-on initialization. Take caution to use it.
15	IO13	GPIO. It can be configured as PWM output pin.
16	IO12	GPIO.
17	IO15	O. It is used in the process of module power-on initialization. Take caution to use it.

Schematic diagram and PCB

Schematic diagram of Tuya Sandwich Wi-Fi SoC master control board (E3S):
PCB of Tuya Sandwich Wi-Fi SoC master control 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 350mA.

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