ITEM NAME:1x ESP8266 DHT11 esp-01S Temperature and Humidity Wifi module Shield Sensor A3D2 Description&Preview.This module uses ESP8266-01/ESP-01S as the master and DHT11 as the temperature and humidity sensor. 1x ESP8266 ESP-01 esp-01S DHT11 Temperature and Humidity WiFi Node Module Wireless Module Not Included.