The development kit based on esp8266, integrates gpio, PWM, it, 1-wire, and ADC all in one board. Power your developement in the fastest way combinating with nodemcu firmware usb-ttl included, plug&play 10 gpio, every gpio can be pwm, i2c, 1-wire fcc certified wi-fi module(coming soon) pcb antenna. Packing details: 1pcs.