The WiFi shield is a CC3000 and an LCM1602 LCD display is used to show the status and IP address so the thermostat configuration can be set. The relay controller used is a 4-relay HL-54S.

LCM1602-14 LCD Arduino Library for NodeMCU, Official Arduino and Maker These libraries support LCM1602A-14 LCD module I2C and SPI communication with NodeMCU ESP8266, official Arduino and Maker (Cytron ...