This module uses ESP8266-01/ ESP-01S as main controller, and the temperature humidity sensor is DHT11. ESP8266 collects the environment temperature and humidity then upload to the server.
This module can be used as a temperature and humidity acquisition for smart home or IOT project.
Features
Master: ESP-01/ ESP-01S
Temperature and humidity sensor: DHT11
Specifications
Working voltage: DC 3.7V-12V (it can be powered by 3.7v lithium battery)