There's a sensor sending data to the ESP8266. That data needs to be transmitted to a web server, process that data, and make a visualization based on that data.

Step 1: set up the ESP client software

Step 2: set up the node.js server software

Step 3: marry the client code with the sensor code

https://diyprojects.io/esp8266-web-client-tcp-ip-communication-examples-esp8266wifi-esp866httpclient/#.WVZxFhOrrR1

Public IP: Google what's my public IP and it will be first result

Private IP: on Mac, it is in Network Settings, right at the top