Temperature monitoring using esp8266 using wifi the project contains 3 files. one for leaf nodes, one for middle nodes, and one for sink node. I have used ESP8266 12E as micro-controller, DHT11 temperature sensor and Raspberry PI as Base station. I have used ARDUINO IDE and follwing libraries. #include <ESP8266WiFi.h> #include <ESP8266WiFiMulti.h> #include <ESP8266WiFiAP.h> #include <DHT.h> First the last node trasmites the data packet to middle node and after that middle node will forward packet to sink node and then finally packet arrived at base station.