Uart WiFi Board

Uart WiFi Board(SKU-3849)

Uart WiFi Board has been launched! It is available in the Switch Science store.

The Uart WiFi Board designed as the transparent WiFi-serial bridge.
There are some updates from the former Uart WiFi Board.

• The 128x32 pixels SSD1306 OLED display
• The 3 user switches(a switch used as power switch too)

Thanks to add the 128x32 pixels OLED display, we can show IP address, SSID and Serial BaudRate.
You don't need remember IP address and Baud Rate, you can see them in the display. The Uart WiFi Board can be programmed using the Arduino IDE.

Some highlights of the Uart WiFi Board:

1. Main core: ESP-WROOM-02(ESP8266).
2. Voltage regulator(3.3V) with control pin.
3. Opto-isolated UART interface(Uart interface circuit accepts 3.3V and 5.0V).
4. On board WiFi-controller can use following functions.
   • LED1(IO2), SW1(IO12/POW_ON), SW2(IO16) and SW3(IO13)
   • Control voltage regulator's control pin connected to "IO14" H:Enable L:Disable(normally)
   • Voltage detection circuit(for CN1) connected to "TOUT"
5. Measures 50mm x 60mm x 20mm

Some highlights of the Sample software:

1. Totally transparent WiFi-serial bridge.
2. IP address, SSID, Serial baud-rate and input-voltage can be displayed.
3. Low voltage detection.

Sample software use the esp8266-oled-ssd1306 library.

Repository Contents

• /Hardware - All Eagle design files (.brd, .sch)
• /Software - Software files for this hardware

Description(Pin Interfaces)

CN1(Primarily) Pin Descriptions:

This connector is the supply voltage.

Pin	Name	Description
1	VBAT	Up to 12.0VDC convert to 3.3VDC
2	GND	GND

CN3(Primarily) Pin Descriptions:

This connector is for uploading software to WiFi-controller.
To be selected BOOT MODE before supply voltage when you upload software.

Pin	Name	Description
1	VCC	3.3VDC
2	TX	UART TX
3	RX	UART RX
4	GND	GND
5	BOOT	Connected to "IO0" H:Flash boot(normally) L:UART download

CN2(Secondary) Pin Descriptions:

This connector is for your target board UART-interface.

Pin	Name	Description
1	VIN	2.7VDC to 5.5VDC
2	TX	UART TX(Open collector output)
3	RX	UART RX
4	GND	GND

How to upload program

See this page.

How to use the Uart WiFi Board

An example is here.

License

The repository is released under Creative Commons ShareAlike 4.0 International.

Distributed as-is; no warranty is given.