Link to diagram and codes:
https://akuzechie.blogspot.com/2021/09/arduino-dht11-web-server-using-ajax.html
Link to my tutorials on HTML & JavaScript programming:
https://www.youtube.com/watch?v=cdzW0gaxoMQ&t=330s
https://www.youtube.com/watch?v=9NG2Ys9Sa_o&t=9s