Based on ESP-8266EX
Arduino compatible, using the Arduino IDE to program
11 x I/O pins
1 x ADC pin (input range of 0-3.3V)
Supports OTA wireless upload
Onboard 5V 1A switching power supply (highest input voltage 24V)
After installing the hardware package,
you can directly use the Arduino IDE for development; the operation is the same as with an Arduino UNO.