In this alternate method, same temperature monitoring system can be viewed on a web browser such as google chrome.
Some data files also have be uploaded to the NodeMCU. Data files includes CSS and JQuery files. Data files can be uploaded by Tools -> ESP8266 Sketch Data Upload. if your Tools menu have no ESP8266 Sketch Data Upload option watch my video of installing ESP8266FS on NodeMCU (https://youtu.be/kSOSOzqSS8o).
If uploading successful, connect your mobile device to NodeMCU through WiFi and open the URL 192.168.4.1 on a web browser to get the same temperature monitoring system.