NodeMCU

The NodeMcu V2 is an open-source WiFi development board with an ESP8266-12E WIFI module.

Perfectly for doing things over WiFi, for examples see the ESPEasy wiki.

ESPEasy

Features:

Memory: 512kb, processor werkt op 40 MHz
WiFi protocols: 802.11 b / g / n standard
Works with: STA / AP / STA + AP
Standard on 9600 BAUD

Built-in TCP / IP protocol stack to support multiple TCP Client connections (5 MAX)
D0 ~ D8, SD1 ~ SD3: used as GPIO, PWM, IIC, etc., port driver capability 15mA
AD0: 1 channel ADC
Power input: 4.5V ~ 9V (10VMAX), USB-powered
Current: continuous transmission: ≈70mA (200mA MAX), Standby: <200uA
Transfer rate: 110-460800bps
Support UART / GPIO data communication interface
Remote firmware upgrade (OTA)
Support Smart Link Smart Networking