We’ve already seen the Arduino IDE supports ESP8266(-EX) WiFi SoC, and some companies have designed Arduino shields for ESP8266 modules, but so far I had never seen an ESP8266 board with Arduino UNO form factor supporting Arduino shields, and that’s exactly what showed up in DX new arrivals RSS feed with a white label ESP-12E UNO board selling for $11.75 including shipping.
The “D1” board has the following specifications:
- ESP8622 Module – AI-Thinker ESP12-E module (as found in NodeMCU) based on ESP8266-EX SoC @ 80 or 160 MHz with 4MB flash
- Connectivity – 802.11 b/g/n with PCB antenna. Supports station / softAP / SoftAP + station modes, WPA/WPA2 security.
- 11x Digital I/O pins
- 1x Analog Input pin
- I/O logic level: 3.3V
- ADC pin (A0) input voltage: 0-3.3V
- Debugging – Via micro USB using CH340G USB-TTL serial chip
- Misc – Reset button
- Power Supply – 6-24VDC via DC jack, 5V via micro USB port
- Dimensions – 7 cm x 5.4 cm x 1.5 cm
The board is said to come with a user’s manual in English, and DealExtreme provides a download link, but there’s only a guide to install CH340 in Windows. The board is supported by Arduino 1.6.5 IDE, and the firmware can be updated over WiFi.
Beside DealExtreme, you can also find ESP8266 D1 board on Aliexpress for $9 and up including shipping, and even less (about $8) if you order 10 pieces or more.