link - https://www.electrodragon.com/product/esp8266-wifi-arduino-uart-extension-board/
Current Version 2
Version 1
Configuration
| Jumper Name | Set | Description |
|---|---|---|
| Flash | ON or OFF | Set flash mode, flash LED will turn on |
| Arduino Serial | D1/D0 or D3/D4 | Arduino serial switch between softserial or hardware serial |
| Serial Switch | Arduino or standalone output |
ESP Serial Part
- ESP-12F-dat
- Serial selectable connect to arduino Serial D0/D1 or D3/D4
Lora SPI Part
- D13 - CLK
- D12 - DO
- D11 - DI
- D10 - CS
- DIO0 / IRQ - D2
Reserved DIO (via jumpers)
- DIO1 - D6
- DIO2 - D7
- DIO5 - D8
- DIO3 - x
- DIO4 - x
Other
- D5 - Flash_CS
DHT11
- Selectable to ESP IO13 or Arduino A0, by backside jumper
Demo code
- arduino_uart_esp_at -> arduino send AT commands to ESP8266
- arduino_uart_esp_wifi -> "transparent" communicatino in TCP client mode
- in https://github.com/Edragon/arduino-esp8266/tree/master/Sketchbook/Hardware