Technical summary
SPECIFICATIONS:
Microcontroller: ESP8266EX
Operating Voltage: 3.3V
Digital I/O Pins: 11 (all I/O pins have interrupt/pwm/I2C/one-wire capability, except for D0)
Analog Input Pins: 1
Flash Memory: 4MB
On-Board Switching Power Supply:
Input Voltage Range: 9V to 12V
Output: 5V at 1A Max
Board Dimensions: 68.6mm x 53.4mm (2.701 x 2.102) / Long x Wide
Weight: 21.8g (0.769oz)
RESOURCES:
ESP8266 with Arduino IDE:
Arduino IDE Board Manager URL: https://arduino.esp8266.com/stable/package_esp8266com_index.json
CH340G Driver Download
ESP8266:
ESP8266EX Datasheet
ESP8266 Technical Reference
ESP8266 AT Instruction Set
ESP8266 AT Command Examples
D1 R2 Board Schematic
