Specifications:
- ESP8266 in ESP-12 package
- 80MHz, 1MB flash, 82kB RAM
- programmable from Arduina!
- 9 GPIO pins of which all support PWM
- 1 analog input(ADC), max. voltage 1V i 5V
- I2C, SPI, serial communication
- CP2102 USB to UART bridge with micro USB connector
- 3.3V voltage regulator
- LEDs: power, tx, rx, GPIO13
- automatical hardware reset before upload of code
- two pushbuttons: reset i GPIO0
- FCC i CE certificates for ESP-12