This ESP-01S DHT11 Module is based on the ESP8266 and DHT11 temperature & humidity sensor, Which is a little node you can put anywhere you like to use in your smart home IoT project. ESP8266 collection environment temperature and humidity upload to the server. 

This module is mainly controlled by ESP8266-01/ESP-01S, and DHT11 is a temperature and humidity sensor. The temperature and humidity in the ESP acquisition environment are uploaded to the server. Support 3.7v-12V DC power supply (3.7V lithium battery). Can be used as a temperature and humidity collection node for smart homes or IoT projects.